20000+1911 RUC  13     CW Sge. Spectral type of resolved companion estimated at G5V.           Ruc2007 
20001+2410 POU4173/4   Aka POU4176/7.                                                                  
                       Unresolved measures were at the old POU4176/7 position.                 Bko2010b
20001+1737 S   730     B is BD+17@4187.                                                                
                       A is variable.                                                                  
20001+1731 H 4 100     AB: H IV 100. Also known as STF2608. B is BD+17@4184.                           
           BU 1477     13 Sge. A is the irregular variable VZ Sge.                                     
20001+1313 BPMA224     [PM2000] 2124918 + [PM2000] 2124127.                                    Gvr2010 
20001+1245 BPM1919     [PM2000] 2124608 + [PM2000] 2124970.                                    Gvr2010 
20001+1111 HJ 1458     B is BD+10@4133.                                                                
20002+3625 STT 394     AB: SEI 778.                                                            Nsn2017b
20002+1454 BPM1920     AB: [PM2000] 2125495 + [PM2000] 2125884.                                Gvr2010 
20002-5522 I  1041     BC: Rapid direct motion.                                                        
           B   459     BC: Gomez et al. (2016) derive dynamical parallax and  component                
                       masses: 15.36 +/- 0.24 mas, 0.655 +/- 0.005 Msun, 0.643 +/- 0.005 Msun  Doc2016i
20005+5921 JNN 124     Aside from the close companion detected in the AstraLux data, 2MASS             
                       J20003177+5921289 possibly has a wide companion at 14", as noted in             
                       the WDS.                                                                Jnn2012 
20005+1643 BPMA225     [PM2000] 2127672 + [PM2000] 2129933.                                    Gvr2010 
20006+1727 BPM1923     [PM2000] 2128515 + [PM2000] 2128537.                                    Gvr2010 
20006+1657 BPM1921     [PM2000] 2128288 + [PM2000] 2127828.                                    Gvr2010 
20006+1257 BPM1922     [PM2000] 2128371 + [PM2000] 2127737.                                    Gvr2010 
20006+1112 BPM1924     [PM2000] 2129073 + [PM2000] 2128893.                                    Gvr2010 
20006-0911 BRT 554     J  1872.                                                                        
20007+3635 WEB   9     BC: SEI 783.                                                            Nsn2017b
20007+2243 BAK   1     CHARA Array Limb-darkened diameter  0.377 +/- 0.024 mas,                CIA2008c
                       R =  0.788 +/- 0.051 \rsun.                                                     
                       CHARA Array Limb-darkened diameter 0.3848 +/- 0.0055 mas,               CIA2015d
                       L = 0.328 +/- 0.011 \lsun, R = 0.805 +/- 0.016 \rsun,                           
                       Teff = 4875 +/- 43 K, Rp = 1.216 +/- 0.024 \rjup,                               
                       M = 0.846 +/- 0.049 \msun, Mp = 1.162 +/- 0.058 \mjup                           
20008+4500 DEA 468     JKA 102. KIC 8845251/8845205.                                                   
20010+3742 BU 1289     AC: SEI 787.                                                            Nsn2017b
20010+2956 L    32     Measures from Lewis were assigned to both this pair and                 L__1899a
                       19590+2953L    31 in the BDS and ADS. Published coordinates and         Bu_1906 
                       magnitudes are also similar, and only one pair is seen on POSS plates,  A__1932a
                       leading to the conclusion that these are the same system. The L 32              
                       designation was maintained, as its WDS designation was correct.                 
20010+1751 BPM1925     [PM2000] 2131567 + [PM2000] 2131286.                                    Gvr2010 
20011+1551 BPM1928     [PM2000] 2132693 + [PM2000] 2133415.                                    Gvr2010 
20011+1550 BPM1927     [PM2000] 2132620 + [PM2000] 2132660.                                    Gvr2010 
20011+1253 BPM1926     [PM2000] 2132582 + [PM2000] 2132225.                                    Gvr2010 
20012+1642 BPM1929     [PM2000] 2133126 + [PM2000] 2133286.                                    Gvr2010 
20012+1530 BPMA226     [PM2000] 2133727 + [PM2000] 2135156.                                    Gvr2010 
20012-3835 HDO 294     A premature orbit has been computed.                                            
20013+1355 BPM1930     [PM2000] 2133981 + [PM2000] 2134651.                                    Gvr2010 
20014+5006 H 5  47     H V 47. STTA197. 26 Cyg.                                                        
20014+1540 BPM1931     [PM2000] 2134829 + [PM2000] 2135352.                                    Gvr2010 
20014+1234 BPM1932     [PM2000] 2135308 + [PM2000] 2134282.                                    Gvr2010 
20014+1045 TOK  34     Aa,Ab: Close visual pair has estimated period of ~100y.                         
                       Primary is 4.5d SB1.                                                    Tok2006 
           STF2613     A premature orbit has been computed for AB. Period of 2350y.            Tok2006 
20014+0657 STF2612     B is BD+06@4402.                                                                
20015+6449 H 6  38     H VI 38. 64 Dra.                                                                
20015+4018 HJ 1468     SEI 796.                                                                Nsn2017b
20015+1556 BPMA227     [PM2000] 2135687 + [PM2000] 2136381.                                    Gvr2010 
20016+3417 SEI 793     Duplicity not apparent on POSS plate; one component may be either               
                       variable star or flaw on AC Potsdam plate.                                      
20016+1144 BPM1933     [PM2000] 2136500 + [PM2000] 2136117.                                    Gvr2010 
20017+1759 BPM1934     [PM2000] 2137252 + [PM2000] 2136464.                                    Gvr2010 
20017+1746 BPM1935     [PM2000] 2137797 + [PM2000] 2138116.                                    Gvr2010 
20017+1328 BPMA228     [PM2000] 2137438 + [PM2000] 2138515.                                    Gvr2010 
20017-0012 H 1  93     H I 93.                                                                         
20018-0354 J   154     J 1693.                                                                         
20019+4052 STTA196     B is BD+40@3983.                                                                
20019+3139 AG  245     SEI 795.                                                                Nsn2017b
20019+1651 BPM1938     [PM2000] 2139179 + [PM2000] 2140282.                                    Gvr2010 
20019+1541 BPM1939     [PM2000] 2139324 + [PM2000] 2138901.                                    Gvr2010 
20019+1458 BPM1940     [PM2000] 2139387 + [PM2000] 2139936.                                    Gvr2010 
20019+1428 BPM1936     [PM2000] 2138827 + [PM2000] 2138074.                                    Gvr2010 
20019+1114 BPM1937     [PM2000] 2139165 + [PM2000] 2138770.                                    Gvr2010 
20020+2456 STT 395     16 Vul.                                                                         
                       Additional notes may be found in Fatou (1941).                          Fat1941 
20020+1707 BPM1941     [PM2000] 2139739 + [PM2000] 2139452.                                    Gvr2010 
20020+1702 BPM1942     [PM2000] 2140266 + [PM2000] 2139243.                                    Gvr2010 
20021+5439 MLR 580     EF: Originally 20025+5437 MLR 580, but the primary is the E component           
                       of 20021+5439 ENG  68CE.                                                        
20021+1331 BPMA229     [PM2000] 2140807 + [PM2000] 2142019.                                    Gvr2010 
20021+1300 JNN 281     Estimated age 1000-10000 Myr; masses 0.41 +/- 0.11 and 0.22 +/- 0.06            
                       Msun; a ~4.3 au.                                                        Jnn2014 
20021+1253 BPM1944     [PM2000] 2140849 + [PM2000] 2140682.                                    Gvr2010 
20021+1103 BPM1943     [PM2000] 2140610 + [PM2000] 2140656.                                    Gvr2010 
20022+1543 BPM1945     [PM2000] 2141491 + [PM2000] 2142120.                                    Gvr2010 
20022+1537 BPMA230     [PM2000] 2141290 + [PM2000] 2142846.                                    Gvr2010 
20023+6438 STTA200     65 Dra. B is BD+64@1406.                                                        
20023+4547 LDS6338     NLTT 48621/48622                                                        Chm2004 
20023+1317 BPM1946     [PM2000] 2142316 + [PM2000] 2142633.                                    Gvr2010 
20024+3519 ES  202     Listed in ADS as Aa'.                                                           
                       AB: SEI 808.                                                            Nsn2017d
                       AC: SEI 805.                                                            Nsn2017d
                       AD: SEI 806.                                                            Nsn2017d
                       AN: SEI 807.                                                            Nsn2017d
20024+1744 BPM1947     AB: [PM2000] 2143503 + [PM2000] 2143519.                                Gvr2010 
           BPM1948     BC: [PM2000] 2143519 + [PM2000] 2142464.                                Gvr2010 
20024+1609 BPM1949     AB: [PM2000] 2143229 + [PM2000] 2143605.                                Gvr2010 
           BPM1950     BC: [PM2000] 2143605 + [PM2000] 2143142.                                Gvr2010 
20025+3341 HO  117     AB: SEI 809.                                                            Nsn2017d
           BKO 520     AC: Anon. 33.                                                           Bko2009d
20025+1557 BPM1951     [PM2000] 2144066 + [PM2000] 2143786.                                    Gvr2010 
20025+0149 HJ 5510     A very similar pair is 6s following and of the same declination         Doo1915b
                       This is likely the new DAM 384.                                                 
20026+3352 BKO 521     Anon. 34.                                                               Bko2009d
20026-6541 I  1409     Motion probably in brighter star.                                       Mlo1927A
20027+3355 BKO 522     Anon. 35.                                                               Bko2009d
20027+3349 BKO 523     Anon. 36.                                                               Bko2009d
20027+1439 BPM1952     [PM2000] 2146127 + [PM2000] 2146206.                                    Gvr2010 
20028+6752 LDS2447     rho Dra = 67 Dra                                                                
20028+3158 ES  359     Originally listed as WDS 20037+3145, due to an error in DM number. See          
                       note for WDS 20037+3145 SEI 827.                                                
20028+3142 ES  358     Aka HDS2858.                                                            Dam2012 
20028+1747 BPM1953     [PM2000] 2146475 + [PM2000] 2146201.                                    Gvr2010 
20029+1455 BPM1955     [PM2000] 2147769 + [PM2000] 2146986.                                    Gvr2010 
20029+1416 OSO 116     G023-023. None is a common proper motion pair, based on color and               
                       comparison with POSS2 red plates                                        Oso2004 
20029+1328 BPM1954     [PM2000] 2147064 + [PM2000] 2147698.                                    Gvr2010 
20029+1056 AG  397     B is BD+10@4155.                                                                
20029-2026 LDS 700     NLTT 48599/48600                                                        Chm2004 
20030+3416 BKO 524     Anon. 37.                                                               Bko2009d
20030+2818 BD+27 3593  Combined solution, based on reduction of Hipparcos intermediate                 
                       astrometric data together with spectroscopic elements from the Geneva           
                       Extrasolar Planet Search Programs home page.                            HaI2001 
                       HD 190228. Combined astrometric/spectroscopic solution, using                   
                       spectroscopic elements (P,T,e,omega) from Perrier et al. (2003 A&A              
                       410, 1039).                                                             SaJ2011 
20030+1328 BPM1956     [PM2000] 2147965 + [PM2000] 2148051.                                    Gvr2010 
20030+0544 V1295 Aql   MWC 325.  Noted as possible binary (separation > 0".020) by Baines et           
                       al. (2006)                                                              Bns2006 
20031+3421 BKO 525     Anon. 84.                                                               Bko2009d
20031+1656 BPM1957     [PM2000] 2148917 + [PM2000] 2149818.                                    Gvr2010 
20031+1221 BPM1958     [PM2000] 2148969 + [PM2000] 2149755.                                    Gvr2010 
20032+2456 L    33     BD may be +24@3987 if double star is real.                                      
20032+1712 BPM1960     [PM2000] 2149905 + [PM2000] 2149749.                                    Gvr2010 
20032+1125 BPM1959     [PM2000] 2149861 + [PM2000] 2148931.                                    Gvr2010 
20032-2229 BRT1558     CD-22@14449.                                                                    
20033+1736 BPM1962     [PM2000] 2150633 + [PM2000] 2150682.                                    Gvr2010 
20033+1354 BPM1961     [PM2000] 2150343 + [PM2000] 2150626.                                    Gvr2010 
20033+1347 BPM1963     [PM2000] 2151039 + [PM2000] 2151715.                                    Gvr2010 
20034+1631 BPM1964     [PM2000] 2151107 + [PM2000] 2151537.                                    Gvr2010 
20035+3837 COU2533     Also known as TDS1037.                                                          
20035+3601 MCA  59     The Aa,Ab pair has been resolved in only 4 of 11 observations, and              
           STF2624     the positions are discrepant (the large errors presumably result from           
                       a large magnitude difference).  The B and C components were also                
                       observed and appeared to be single.                                     Msn1998a
                       Classification of B and C components are from Hoffleit et al. (1983).   Hof1983 
                       Both A and B are SBs, and there is a small light variation.                     
                       AB: H 1  96.                                                            MEv2010 
                       AD: SEI 826.                                                            Nsn2017d
20035+1408 BPM1965     [PM2000] 2151908 + [PM2000] 2152028.                                    Gvr2010 
20036+2954 LDS6339     HIP 98767. See Allen et al. (2000) for information on metallicity,      AlC2000 
                       age, galactic orbital parameters, etc.                                          
                       CHARA Array Limb-darkened diameter  0.698 +/- 0.019 mas,                CIA2008c
                       R =  1.200 +/- 0.033 \rsun.                                                     
                       NLTT 48652/48646                                                        Chm2004 
20036+1634 BPM1966     [PM2000] 2153071 + [PM2000] 2152942.                                    Gvr2010 
20036-3315 OCC1105     Position angle ambiguous. Either the listed 290+/-10 or 235+/-10.       OCC2014d
20037+3820 HJ 1470     B is BD+37@3743.                                                                
                       SEI 831.                                                                Nsn2017d
20037+3626 SEI 830     The primary is an ellipsoidal variable, V1362 Cyg.                              
20037+3145 SEI 827     BD+31 3915. The Scheiner pair was originally listed as the AD pair of           
                       a multiple which included ES 359AB and BC. However, the Espin pair is   Es_1907a
                       actually BD+31 3905, but was incorrectly given the wrong DM number and          
                       coordinates. The Espin triple has been changed to WDS 20028+3158 and            
                       the Scheiner pair changed to a simple binary pair.                              
20038+1512 BPM1968     [PM2000] 2154916 + [PM2000] 2154870.                                    Gvr2010 
20038+1450 BPM1967     [PM2000] 2154631 + [PM2000] 2154546.                                    Gvr2010 
20039+4411 ES   85     HJ 1478.                                                                        
                       BD+43 3470                                                              Doo1915a
20039+1746 BPM1969     [PM2000] 2155125 + [PM2000] 2154574.                                    Gvr2010 
20039+1604 BPMA231     [PM2000] 2155328 + [PM2000] 2157458.                                    Gvr2010 
20040+1704 BPM1970     [PM2000] 2155941 + [PM2000] 2155917.                                    Gvr2010 
20040-6541 I  1411     LDS 698.                                                                        
20040-7847 HJ 5149     B is CPD-79@1051.                                                               
20041+5428 STI2497     MLR 581.                                                                        
20041+3815 TOR  18     Formerly known as PAN  15.                                                      
20041+1704 STT 592     15 Sge. B is BD+16@4117a.                                                       
                       AB and AC: Optical pairs, based on study of relative motion of the              
                       components using the method of apparent motion parameters.              Kiy2008 
           LIM   3     Aa,Ab: GJ 779 = 15 Sge. Due to the high proper motion of the primary,           
                       Liu et al. (2002) determine that the faint companion shares common      LiM2002 
                       proper motion. Spectral type of the companion is estimated at L4.5 +/-          
                       1.5; assuming the two components are coeval, the inferred mass of the           
                       companion is 55-78 Mjup.                                                        
                       Boccaletti et al (2003) derive spectral type for the companion of L4.5  Boc2003 
                       +/- 1.5 and a mass of 60-72 Mjup.                                               
           BUP 202     AD: Optical pair, based on study of relative motion of the components           
                       using the method of apparent motion parameters.                         Kiy2008 
           STT 592     AB, AC: Rectilinear solutions by Hurowitz et al. (2014).                USN2014b
           BUP 202     AD: Rectilinear solution by Friedman et al. (2011).                     USN2011a
20041+5428 STI2497     Rectilinear solution by Hurowitz et al. (2014).                         USN2014b
20041+1700 STF2622     PTT  28, formerly listed at 20051+1641 is in reality this object.       Hei1980a
                       AB: H 2  91.                                                            MEv2010 
20041-4547 CPO  87     B is CD-46@13365.                                                               
20042+3755 TOR  19     Formerly known as PAN  16.                                                      
20042+1148 STF2620     Primary is the eclipsing binary V1470 Aql, P = 0.83499 day.             Zas2010 
20044+3820 TOR  20     Formerly known as PAN  17.                                                      
20044+1742 BPM1971     [PM2000] 2158862 + [PM2000] 2159794.                                    Gvr2010 
20045+1638 BPM1972     AB: [PM2000] 2159565 + [PM2000] 2159415.                                Gvr2010 
           BPM1973     AC: [PM2000] 2159565 + [PM2000] 2159146.                                Gvr2010 
           BPM1974     AD: [PM2000] 2159565 + [PM2000] 2158789.                                Gvr2010 
20045+1254 BPM1975     [PM2000] 2160302 + [PM2000] 2159690.                                    Gvr2010 
20046+3213 HJ 1471     A is variable.                                                                  
20046+1729 BPM1978     [PM2000] 2160685 + [PM2000] 2160495.                                    Gvr2010 
20046+1310 BPM1976     [PM2000] 2160414 + [PM2000] 2160684.                                    Gvr2010 
20046+1159 BPM1977     [PM2000] 2160422 + [PM2000] 2160714.                                    Gvr2010 
20047+2443 BRT3354     Aka J   504.                                                            Dam2013 
                       Originally published as BRT 209.                                        Brt1928 
20047+1238 BPM1979     [PM2000] 2161532 + [PM2000] 2161581.                                    Gvr2010 
20048+1554 STT 397     Optical pair, based on study of relative motion of the components               
                       using the method of apparent motion parameters.                         Kiy2008 
                       H 5 105.                                                                MEv2010 
20048+1346 BPM1980     [PM2000] 2162289 + [PM2000] 2162775.                                    Gvr2010 
20048+1240 BPM1981     [PM2000] 2162400 + [PM2000] 2161971.                                    Gvr2010 
20049+3431 BKO 526     Anon. 38.                                                               Bko2009d
20049+1258 BPM1982     [PM2000] 2163377 + [PM2000] 2163505.                                    Gvr2010 
20050+5426 MGN   1     Primary is the sdM1.5+WD SB1 Wolf 1130 = GJ 781. Companion is a T8              
                       subdwarf which shows common proper motion. Distance to the system is            
                       15.83 +/- 0.96 pc, metallicity [FE/H] = -0.64 +/- 0.17.                 MGN2013 
20050+1544 BPM1983     AB: [PM2000] 2163894 + [PM2000] 2164598.                                Gvr2010 
           BPM1984     BC: [PM2000] 2164598 + [PM2000] 2164634.                                Gvr2010 
20051+3021 ES  497     BRT 277.                                                                Brt1929b
20051+2629 DOO  77     Misdentification by Doolittle, plus misinterpretation of his note       Doo1915a
                       ("Identified by Burnham with BD+26 3785, but this star is not double.           
                       Near BD+26 3780.") led to identification of this pair with BD+26 3785           
                       and confusion with the similar pair 20054+2716HJ 1473.                          
20051+2039 BUP 203     A is the semiregular variable X Sge, P = 196d.                                  
20051+1822 BPM1985     [PM2000] 2164770 + [PM2000] 2165133.                                    Gvr2010 
20051+1241 BPMA232     [PM2000] 2164926 + [PM2000] 2164997.                                    Gvr2010 
20051-1136 H 4   3     H IV 3.                                                                         
20052+3857 BU 1480     SEI 845.                                                                Nsn2017d
20052+1510 BPM1986     [PM2000] 2165082 + [PM2000] 2165200.                                    Gvr2010 
20052+1137 BPMA233     [PM2000] 2165463 + [PM2000] 2167166.                                    Gvr2010 
20053+1654 BPM1987     [PM2000] 2165845 + [PM2000] 2165583.                                    Gvr2010 
20053+1500 BPM1988     [PM2000] 2166204 + [PM2000] 2165684.                                    Gvr2010 
20054+5807 A   866     Aka ARG 106. B is BD+57@2131.                                                   
                       Pair correctly identified by Marco Scardia.                             Sca2018d
20054+1530 BU   57     A is a spectroscopic binary.                                                    
20054+1424 BPMA234     [PM2000] 2166851 + [PM2000] 2165507.                                    Gvr2010 
20055+5800 WSI 164     Pair assumed to be A   866 which is actually at 20054+5807.             Sca2018d
20056+1554 BPM1989     [PM2000] 2168608 + [PM2000] 2168707.                                    Gvr2010 
20057+5925 HJ 2934     This is a measure of BD+59@2175 with respect to A.                              
20057+3905 J  1072     SEI 855                                                                 Nsn2017d
20057+3536 SHJ 316     STTA199. Based on MacEvoy's (2010) conclusion that SHJ 316 and H 6  59  MEv2010 
                       were the same pair, the 1781 measure of 20097+3701 H 6  59 was merged           
                       this much more well-observed pair.                                              
20057+1719 BPM1991     [PM2000] 2169292 + [PM2000] 2170133.                                    Gvr2010 
20057+1617 BPM1992     [PM2000] 2169312 + [PM2000] 2170016.                                    Gvr2010 
20057+1548 BPM1990     [PM2000] 2168865 + [PM2000] 2168089.                                    Gvr2010 
20058+3605 SEI 853     ALI 169.                                                                        
20058+2313 POU4212     LDS1032.                                                                        
20058+1709 BPM1996     [PM2000] 2170013 + [PM2000] 2170325.                                    Gvr2010 
20058+1647 BPM1995     [PM2000] 2170011 + [PM2000] 2169623.                                    Gvr2010 
20058+1533 BPMA235     [PM2000] 2170149 + [PM2000] 2169943.                                    Gvr2010 
20058+1521 BPM1997     [PM2000] 2170045 + [PM2000] 2169500.                                    Gvr2010 
20058+1519 BPM1993     [PM2000] 2169933 + [PM2000] 2169728.                                    Gvr2010 
20058+1507 BPM1994     [PM2000] 2169976 + [PM2000] 2170120.                                    Gvr2010 
20058-1703 FEN  36     LEO 47. J 1697.                                                                 
20059+3755 ES 2119     SEI 868.                                                                        
20060+3547 BU  440     AB: A is a Wolf-Rayet binary, V1676 Cyg or WR 133, spectral types are           
           SHJ 314     WN5+O9.5I/III. The classification is from Wilson (1949).                WOC1949 
                       Spectroscopic Binary, P = 112.7d.                                               
                       Spectrum of B: B3V. Some components previously known as STF2630.                
                       Classification of the B, D, and F  components are from Hoffleit et al.  Hof1983 
                       (1983).                                                                 Msn1998a
                       STF2630.                                                                        
           BU  429     AD: SEI 859.                                                            Nsn2017d
                       AD: H 3 113.                                                            MEv2010 
           DOO  78     FH: SEI 861.                                                            Nsn2017d
20060+3546 ES   25     AB: SEI 860.                                                            Nsn2017d
           SHJ 315     AD: SEI 863.                                                            Nsn2017d
                       AD: 20060+3545 TOB 166.                                                .        
           ES   25     AF: the F component is the A component of 20060+3547BU  440AB.                  
           SEI 865     EG: Originally 20061+3546 SEI 865, but the B component found to be the          
                       E component of 20060+3546 WAL 127AE. Systems were merged, with a                
                       quadrant flip.                                                                  
20062+5310 ENG  70     B is BD+52@2626.                                                                
20063+1550 BPM1998     [PM2000] 2173542 + [PM2000] 2172670.                                    Gvr2010 
20063+1549 BPMA236     [PM2000] 2174177 + [PM2000] 2175581.                                    Gvr2010 
20063+1403 BPMA237     [PM2000] 2174184 + [PM2000] 2174362.                                    Gvr2010 
20063+1229 BPM1999     [PM2000] 2173956 + [PM2000] 2174482.                                    Gvr2010 
20063+0639 J  1337     J 2569 identical. Corrected position by Heintz.                         Hei1987a
20063-4313 I   662     HIP 99029. See Allen et al. (2000) for information on metallicity,      AlC2000 
                       age, galactic orbital parameters, etc.                                          
20064+3558 BUP 204     27 Cyg. SEI 878 is identical.                                                   
20064+1329 BPM2000     [PM2000] 2174396 + [PM2000] 2174568.                                    Gvr2010 
20065+3302 GYL  23     SEI 879. The discrepant Scheiner measure was due apparently to a 2s     Sei1908 
                       error in the Astrographic Catalog right ascension of the primary.               
20066+1311 BPM2001     [PM2000] 2176133 + [PM2000] 2175639.                                    Gvr2010 
20066+1147 J   503     BRT1335.                                                                        
20066+0735 STTA198     B is BD+07@4366.                                                                
20067+6214 TOR  22     Formerly known as PAN  19.                                                      
20068+3203 SEI 881     HAU   6.                                                                        
20068-1256 STF2625     H 3  63.                                                                MEv2010 
20068-4031 WG  250     Spectrum A7/8III/IV.                                                            
20068-5615 I  1412     LDS 702.                                                                        
20069+1630 BPM2002     [PM2000] 2178259 + [PM2000] 2177364.                                    Gvr2010 
20069-0855 HDO 156     B is the Mira-type variable RY Cap.                                             
                       Winlock includes this star in a list of new doubles; no description     Win1882 
                       is given other than a date of 1868.62.                                          
20070+1803 BPM2003     [PM2000] 2178810 + [PM2000] 2178648.                                    Gvr2010 
20070+1647 BPM2004     [PM2000] 2179019 + [PM2000] 2178022.                                    Gvr2010 
20070+1430 BPM2005     [PM2000] 2179331 + [PM2000] 2179499.                                    Gvr2010 
20071+1247 BPM2006     [PM2000] 2179892 + [PM2000] 2180002.                                    Gvr2010 
20073+1718 BPM2008     [PM2000] 2181023 + [PM2000] 2181292.                                    Gvr2010 
20073+1605 STF2629     H 2  70.                                                                MEv2010 
20073+1418 BPM2010     [PM2000] 2181515 + [PM2000] 2181473.                                    Gvr2010 
20073+1354 BPM2009     [PM2000] 2181026 + [PM2000] 2181994.                                    Gvr2010 
20073+1331 BPM2011     [PM2000] 2181586 + [PM2000] 2180641.                                    Gvr2010 
20073+1236 BPM2007     [PM2000] 2180996 + [PM2000] 2181711.                                    Gvr2010 
20074+3819 POP 187     Aka POP 214.                                                            Dam2016d
20074+3751 POP 191     Aka POP 188.                                                            Skf2016 
20074+3543 STT 398     A is a spectroscopic binary.                                                    
                       AB: The classification and orbit are from Burkholder et al. (1997 ApJ           
                       490, 328).                                                              Msn1998a
20074+1442 BPM2012     [PM2000] 2181875 + [PM2000] 2182120.                                    Gvr2010 
20074-2943 HJ 5168     B is CD-30@17665.                                                               
20075+3236 SEI 895     Neither component seen on POSS plate; may be flaws on AC Potsdam plate          
20075+3053 ES  360     Aka TDS1997.                                                                    
20075+1522 BPMA238     [PM2000] 2182947 + [PM2000] 2184083.                                    Gvr2010 
20075-0037 H 4  34     H IV 34.                                                                        
20076+3837 A  1416     Aka STH   8.                                                            Dam2016d
20076+1741 JEF   3     Recurrent nova WZ Sge. Also a W UMa variable.                                   
20076+1700 BPMA239     [PM2000] 2183254 + [PM2000] 2183058.                                    Gvr2010 
20077+1459 BPM2013     [PM2000] 2184218 + [PM2000] 2184866.                                    Gvr2010 
20077+0446 STF2627     C is BD+04@4349.                                                                
20078+1800 BPM2015     [PM2000] 2185135 + [PM2000] 2186050.                                    Gvr2010 
20078+1548 BPM2014     [PM2000] 2184789 + [PM2000] 2185273.                                    Gvr2010 
20078+0924 STF2628     H 2  29.                                                                MEv2010 
                       Additional notes may be found in Fatou (1941).                          Fat1941 
                       B is SB2, P=23.844d                                                     Tok2014d
20079+3605 SEI 908     J 1162.                                                                         
20079+3111 WAK  16     SE of ADS 13406.                                                                
20080+3235 STF2633     AB: SEI 902.                                                            Nsn2017d
20080+1816 BPM2016     [PM2000] 2186666 + [PM2000] 2185982.                                    Gvr2010 
20080-0041 SHY 325     HIP  99171 + HIP  99100. Primary is 64 Aql.                                     
20081+3241 SEI 906     Neither component seen on POSS plate; may be flaws on AC Potsdam plate          
20081-3929 RST2134     Gomez et al. (2016) derive dynamical parallax and component masses:             
                       7.35 +/- 0.33 mas, 0.993 +/- 0.021 Msun, 0.909 +/- 0.019 Msun.          Doc2016i
20082+1339 BPM2017     [PM2000] 2187618 + [PM2000] 2187742.                                    Gvr2010 
20083+1533 BPM2018     [PM2000] 2188723 + [PM2000] 2188172.                                    Gvr2010 
20084+3808 HJ  606     B is BD+37@3783.                                                                
20084+3528 ES  203     SEI 909.                                                                Nsn2017d
20084+1627 BPM2020     [PM2000] 2189479 + [PM2000] 2189621.                                    Gvr2010 
20084+1558 BPM2019     [PM2000] 2189115 + [PM2000] 2188480.                                    Gvr2010 
20084+1503 OSO 117     G143-033. None of the OSO components is a common proper motion pair,            
                       based on comparison with POSS2 red plates                               Oso2004 
20085+1806 BPM2021     [PM2000] 2190025 + [PM2000] 2190679.                                    Gvr2010 
20086+1307 BPM2022     [PM2000] 2190578 + [PM2000] 2190710.                                    Gvr2010 
20086-4618 CPO  88     B is CD-46@13400.                                                               
           UC 4100     BD: Originally 20087-4618 UC 4100, but primary was found to be B                
                       component of 20086-4618 CPO  88.                                                
20087+1603 BPM2023     [PM2000] 2191132 + [PM2000] 2190353.                                    Gvr2010 
20087+1223 J  1338     Pair measured in 1948 is indeed the same one measured in 1914. It is            
                       -17s, +0' from BD+11 4154.                                              J__1949a
                       Rectilinear solutions by Cvetkovic (2015)                               Cve2015b
                       and Cvetkovic et al. (2016).                                            Cve2016 
20088+1605 BPM2025     [PM2000] 2192282 + [PM2000] 2192439.                                    Gvr2010 
20088+1537 BPM2024     [PM2000] 2192024 + [PM2000] 2191750.                                    Gvr2010 
20088+1201 BPM2026     [PM2000] 2192296 + [PM2000] 2191695.                                    Gvr2010 
20089+7743 STF2675     kap Cep = 1 Cep                                                                 
                       AB: H 3  70.                                                            MEv2010 
                       AB: Additional notes may be found in Dembowski (1883).                  D__1883 
20089+3450 SEI 918     Secondary not seen on Aladin images; typo or plate flaw in AC Catalog.          
20089+2520 AG  247     This is a distant companion. Original star single.                              
20089+1230 BPMA240     [PM2000] 2192722 + [PM2000] 2190971.                                    Gvr2010 
20089+1127 BPM2027     [PM2000] 2192644 + [PM2000] 2191882.                                    Gvr2010 
20089+1111 BPM2028     [PM2000] 2192677 + [PM2000] 2191969.                                    Gvr2010 
20090+4252 OSO 118     G125-064. Neither is a common proper motion pair, based on comparison           
                       with POSS2 red plates.                                                  Oso2004 
20090+3516 SEI 919     ALI   8.                                                                        
20090+3258 SEI 916     Neither component seen on POSS plate; may be flaws on AC Potsdam plate          
20090+2718 BRT 210     Misidentified in ADS catalog.                                                   
20090+1535 BPM2029     [PM2000] 2193402 + [PM2000] 2193844.                                    Gvr2010 
20090+1355 BPM2030     AB: [PM2000] 2193571 + [PM2000] 2193636.                                Gvr2010 
           BPM2031     AC: [PM2000] 2193571 + [PM2000] 2192886.                                Gvr2010 
           BPM2032     BC: [PM2000] 2193636 + [PM2000] 2192886.                                Gvr2010 
20090+0127 BAL1544     J 1698.                                                                         
20091+1638 BPM2034     [PM2000] 2194255 + [PM2000] 2194438.                                    Gvr2010 
20091+1117 BPM2033     [PM2000] 2194221 + [PM2000] 2194724.                                    Gvr2010 
20091-2613 MET  88     All seven faint companions appear to be background stars.                       
           VIG  19                                                                             Vig2012 
20092-4105 GRV1264     Both A and B have approximately the same radial velocity.               Gvr2019b
                       Also known asKPP3108.                                                           
20093+1549 BPM2035     [PM2000] 2195432 + [PM2000] 2195376.                                    Gvr2010 
20093-1925 HU   80     SEE 406.                                                                        
20094+3630 SEI 928     D is BD+36@3905.                                                                
           ABH 131     AF: BKO  96AO.                                                                  
20094+3309 GIC 162     G125-066/G125-065.                                                              
                       NLTT 48819/48820                                                        Chm2004 
20094+3244 SEI 925     Secondary not seen on POSS plate; may be flaw on AC Potsdam plate.              
20094+1613 BPM2036     [PM2000] 2196152 + [PM2000] 2196147.                                    Gvr2010 
20095+4752 BLL  45     A is the irregular variable SV Cyg. B is BD+47@3034.                            
20096+1648 STF2634     Mt. Wilson spectral type of B is K5.                                            
                       Aka H 2  70 = S   734.                                                  Bu_1906 
20096+1540 BPM2037     [PM2000] 2197958 + [PM2000] 2197337.                                    Gvr2010 
20096-8248 SHY 766     HIP  99318 + HIP  96923.                                                        
20097+3240 SEI 933     Neither component seen on POSS plate; may be flaws on AC Potsdam plate          
20097-2216 BRT1561     CD-22@14512.                                                                    
20097-4522 RSS  35     This previously uncataloged double star was a Hipparcos double entry            
                       system.  The first measure is determined from the individual positions          
                       listed by Rousseau et al.                                               Rss1996 
                       Optical pair, based on study of relative motion of the components               
                       using the method of apparent motion parameters.                         Kiy2008 
20098+3130 SEI 932     Neither component seen on POSS plate; may be flaws on AC Potsdam plate          
20098+1215 TOR  21     Formerly known as PAN  18.                                                      
20099+2055 STF2637     the Sge = 17 Sge. STTA201 = STFA 49. B is BD+20@4455.                           
                       AC: Optical pair, based on study of relative motion of the components           
                       using the method of apparent motion parameters.                         Kiy2008 
                       BC: Mt. Wilson spectral type of B is G3, C is K1.                               
                       AB: HJL 272.                                                            HJL1986 
                       AB: H 3  24.                                                            MEv2010 
20100+7711 PLT   8     SZ Cep.                                                                 Plt1934 
20100+1457 BPM2039     [PM2000] 2200353 + [PM2000] 2200006.                                    Gvr2010 
20100+1216 BPM2038     [PM2000] 2200118 + [PM2000] 2199900.                                    Gvr2010 
20100+1021 A  1199     A is the Algol-type system V346 Aql.                                            
20100-2802 BRG  30     Given the relatively small separation (~0.62") and the similar                  
                       brightnesses of the two components in the 2MASS J20100002-2801410               
                       system, it is likely that they form a physical pair. However, only one          
                       epoch of imaging exists at this point.                                  Jnn2012 
20102+4357 STT 400     Pourbaix gives combined solution for this resolved SB2, yielding        Pbx2000b
                       orbital parallaxes and component masses.                                        
                       Eccentricity incorrectly given as 0.468 by Heintz (1985); correct       Hei1985d
                       value 0.486 (Erratum noted in Inf. Circ. 98, 1986)                              
                       Incorrect value of omega given by Burnham (1898); corrected by          Bu_1898 
                       Doberck (1898)                                                          Dob1898c
                       Malkov et al. (2012) derive dynamical, photometric, and spectroscopic           
                       masses of 1.67 +/- 0.26, 2.08, and 0.98 Msun, respectively.             Mlk2012 
20102+3644 ES   87     SEI 940.                                                                Nsn2017d
20102+1723 BPM2040     AB: [PM2000] 2201513 + [PM2000] 2202022.                                Gvr2010 
           BPM2041     BC: [PM2000] 2202022 + [PM2000] 2202081.                                Gvr2010 
           BPM2042     CD: [PM2000] 2202081 + [PM2000] 2202900.                                Gvr2010 
20102+1646 BPMA241     [PM2000] 2201645 + [PM2000] 2201527.                                    Gvr2010 
20103-2147 PRB   8     Primary is WD 2007-21 = GJ 781.3 = NLTT 48815, secondary is NLTT                
                       48706. Possible CPM pair, according to Probst (1983).                   Prb1983 
20104+3644 SEI 946     AC. Very faint object seen on POSS plate near purported position of C           
                       component; uncertain whether Scheiner's tertiary is a variable star or          
                       a flaw on AC Potsdam plate.                                                     
                       C may be at 292 deg & 15.1" with a 120 deg error by Scheiner.           Dam2011 
20105+4923 ES 1099     Appears to be the same as FOX  34.                                      Dam2013 
20105+3225 SEI 943     Secondary not seen on POSS plate; may be flaw on AC Potsdam plate.              
20105+2920 BRT  46     W Uma (EW) type eclipsing binary, P = 0.63757 d.                        Zas2011 
20106+3751 SEI 949     SLE 951.                                                                        
20106+3338 S   738     B is BD+33@3780.                                                                
20106+1701 BPM2043     [PM2000] 2204551 + [PM2000] 2204361.                                    Gvr2010 
20106+0632 LUH  15     LSPM J2010+0632 + 2MASS J20103539+0634367.                              Luh2012b
20107+3703 STT 399     AB: SEI 955.                                                            Nsn2017d
20107+1750 BPM2044     [PM2000] 2204621 + [PM2000] 2204839.                                    Gvr2010 
20108+3320 SEI 952     Precise coordinates are of object observed by Heintz, who notes that    Hei1985a
                       nothing was seen at IDS position. Identification with the SEI pair is           
                       uncertain.                                                                      
20108+2358 OSO 119     Not a common proper motion pair, based on comparison with POSS2 red             
                       plates                                                                  Oso2004 
20108+1614 BKO 527     Anon. 39.                                                               Bko2009d
20108+1541 BPM2045     [PM2000] 2205696 + [PM2000] 2205391.                                    Gvr2010 
20110+5717 ARG  36     HJL 273.                                                                HJL1986 
20111+4131 HJ 1491     20102+4130WFC 229.                                                              
                       Pair is BD+41 3634 and is about 1.5mag brighter than stated.            Brt1939a
20111+1611 GIC 163     Aa = G143-034/G143-035 = GJ 783.2AB.                                            
                       Aa,Ab: NLTT 48851/48854                                                 Chm2004 
           HZG  15     AD: Rectilinear solution by Friedman et al. (2011).                     USN2011a
20111-1252 HO  119     J 2299.                                                                         
20111-5731 HDO 295     Spectroscopic triple.                                                           
20112-3606 HJ 5173     Proper motion +465 -1581.                                                       
                       HIP 99461. See Allen et al. (2000) for information on metallicity,      AlC2000 
                       age, galactic orbital parameters, etc.                                          
20113+3550 HJ 1489     AD: SEI 967.                                                            Nsn2017d
20113+1209 BPM2046     [PM2000] 2208957 + [PM2000] 2208828.                                    Gvr2010 
20113-0008 S   735     B is BD-00@3935.                                                                
                       H 5 136.  H 6  27.                                                      McE2010 
20113-0049 ISO  12     the Aql = 65 Aql. A is a spectroscopic binary, P = 17.12d.                      
                       The Aa,Ab pair cannot be this object.                                           
           BU 1540     AB: Incorrectly identified as H 6  27 in BDS. Error noted by MacEvoy.   McE2010 
           MKT  10     the Aql.                                                                        
                       Visual orbit by Hummel et al. (1995) based on astrometry from Mark III  MkT1995 
                       interferometer. Additional spectroscopic data yield component masses,           
                       luminosities, radii, effective temperatures, and distance.                      
                       Pourbaix gives combined solution for this resolved SB2, yielding        Pbx2000b
                       orbital parallaxes and component masses.                                        
                       Hipparcos astrometric solution adopted some elements from the orbit of  HIP1997d
                       Hummel et al. (1995).                                                   MkT1995 
                       Aa,Ab: Malkov et al. (2012) derive dynamical, photometric, and                  
                       spectroscopic masses 10.09 +/- 0.66, 9.08, and 2.88 Msun, respectively. Mlk2012 
20114+3552 HJ 1490     SEI 969.                                                                        
20114+1102 BPM2047     [PM2000] 2209600 + [PM2000] 2210110.                                    Gvr2010 
20115+3539 SEI 968     HLM  37.  BRT3253.                                                      Brt1951 
                       SEI 970.                                                                Nsn2017d
20115+1524 BPM2048     [PM2000] 2209955 + [PM2000] 2209806.                                    Gvr2010 
20116+6205 LDS2791     Primary is 68 Dra, X-ray source, SB. Rapid rotator?                     Tok2014d
20116+3853 A  1418     SEI 981.                                                                Nsn2017d
20116+1417 BPM2050     [PM2000] 2210831 + [PM2000] 2211559.                                    Gvr2010 
20116+1336 BPM2049     [PM2000] 2210557 + [PM2000] 2210979.                                    Gvr2010 
20117+1221 BPM2051     AB: [PM2000] 2211498 + [PM2000] 2211470.                                Gvr2010 
           BPM2052     BC: [PM2000] 2211470 + [PM2000] 2211313.                                Gvr2010 
20118+7614 MLR 232     No significant movement since first resolution.                         Drd2009 
20118+1117 BPM2053     [PM2000] 2212269 + [PM2000] 2212364.                                    Gvr2010 
20118-1205 H 6  92     H VI 92. B is BD-12@5662.                                                       
20119+6431 STF2660     LDS2448. B is BD+64@1424.                                                       
20119+3612 BLL  46     A is the irregular variable V1042 Cyg.                                          
20119+3551 SEI 983     J  1164.                                                                Nsn2016 
20119+3510 SEI 988     J 127.                                                                          
20119+2351 POU4262     J 1768.                                                                         
20119+2020 HRL   1     A is the Mira-type variable FG Sge.                                             
20120+3429 HO  121     AB,C: SEI 986.                                                          Nsn2017d
20120+3227 SEI 984     Not found by Heintz at IDS position.                                    Hei1990b
20120-0039 J   548     Aka J  2402.                                                                    
20120+2350 POU4263     J 1769.                                                                         
20121+4618 OSO 120     G209-020. Neither AB nor AD is a common proper motion pair, based on            
                       comparison with POSS2 red plates                                        Oso2004 
20122+3827 STT 401     H N  86.                                                                MEv2010 
20122+3810 SEI 998     J 1166.                                                                         
20122+1712 BPM2054     [PM2000] 2214471 + [PM2000] 2214253.                                    Gvr2010 
20122+1534 BKO 528     Anon. 40.                                                               Bko2009d
20122+0255 BAL2019     J 1387.                                                                         
20123+3205 STF2649     B is BD+31@3989.                                                                
                       AB: SEI 993.                                                            Nsn2017d
20123+1650 BPM2056     [PM2000] 2215567 + [PM2000] 2215701.                                    Gvr2010 
20123+1525 BPM2055     [PM2000] 2215401 + [PM2000] 2215107.                                    Gvr2010 
20124+2224 GRV 322     AC: Also known as GRV 321AB.                                                    
20124-1237 BUP 206     xi 2 Cap = xi Cap = 2 Cap                                                       
           TDT2085     AC: SHY 326. Bayesian analysis by Shaya & Olling (2011) indicates very  Shy2011 
                       high (near 100%) probability pair is physical.                                  
20124-2237 RST3250     CD-22@14551.                                                                    
20125+1634 BPM2057     [PM2000] 2216856 + [PM2000] 2216408.                                    Gvr2010 
20126+4016 HD 192281   Barannikov (1993 SvAL 19, 420) suggests a possible low-amplitude orbit          
                       with a period of 5.5d, but we have placed the star in the "C" category  Gie1986 
                       based on the constancy found by Gies & Bolton (1986).                   Msn1998a
20126+2529 BRT3355     Originally published as BRT 211.                                        Brt1928 
20126+1616 CHE  67     Error in transcribing original 1910 coordinates led to this system              
                       being listed in WDS as 02136+1626.                                              
           BKO 529     Anon. 41.                                                               Bko2009d
20126+1553 BKO 530     Anon. 42.                                                               Bko2009d
20126+0052 STF2644     H 2  96.                                                                MEv2010 
20127+1514 BPM2058     [PM2000] 2217990 + [PM2000] 2218378.                                    Gvr2010 
20128+2725 MLB 706     One of a group of faint stars = BD+27 3650.                             Mlb1932 
20128+2312 POU4276     LDS1034.                                                                        
20129+3429 AG  250     SEI1009.                                                                Nsn2017d
20129+1548 CHE 201     AB: Same as 20128+1548SMA 113                                                   
           CHE 202EF   Aka BKO 531 or Anon. 43.                                                Bko2009d
20129+1246 BPM2059     [PM2000] 2219265 + [PM2000] 2218952.                                    Gvr2010 
20130+1624 BPM2061     [PM2000] 2220054 + [PM2000] 2219442.                                    Gvr2010 
20130+1211 BPM2060     [PM2000] 2220051 + [PM2000] 2219881.                                    Gvr2010 
20130+1029 J   549     J 176.                                                                          
20131+3411 STT 203     B is BD+33@3809.                                                                
20131+1713 BPM2062     [PM2000] 2220519 + [PM2000] 2221274.                                    Gvr2010 
20131-1111 BRT2771     Aka J  2304.                                                                    
20132+1541 BKO 532     Anon. 44.                                                               Bko2009d
20133+1529 BKO 533     Anon. 45.                                                               Bko2009d
20134+3844 BLL  47     A is the semiregular variable RS Cyg.                                           
                       B is BD+38@3956.                                                                
20134+1536 BKO 534     Anon. 46.                                                               Bko2009d
20134-1526 KUI  96     B has negative V-K but J-K=0.69. Is B a white dwarf?                    Tok2014d
20134-4612 CD-4613445  HD 191760. Combined astrometric/spectroscopic solution, using                   
                       spectroscopic elements (P,T,e,omega) from Jenkins et al. (2009 MNRAS            
                       398, 911).                                                              SaJ2011 
20136+5307 STF2658     Mt. Wilson spectral type of A is F4s, of B K2.                                  
                       AB: H N  72.                                                            MEv2010 
                       AC: Optical pair, based on study of relative motion of the components           
                       using the method of apparent motion parameters.                         Kiy2008 
                       BC: Rectilinear solution by Friedman et al. (2012).                     USN2012a
20136+4644 WRH  33     Aa,Ab: 31 Cyg = omi 1 Cyg. A spectroscopic, eclipsing, astrometric,             
                       interferometric binary. A is the zeta Aurigae-type binary V695 Cyg.             
                       It is spectrum K4Ib+B3-4.                                                       
                       Aa,Ab: Star D noted as single. See Wilson (1950) for extensive notes            
                       on comparison of measures with orbits, mass estimates, etc.             WRH1950a
                       Aa,Ab: Reality of these measures would seem more questionable than              
                       those published in 1950.                                                WRH1951 
                       Aa,Ab: Attempted to observe visually this 10yr binary which passed              
                       eclipse late in 1951.                                                   WRH1954b
                       Aa,Ab: Correction for magnitude difference should increase this                 
                       estimated separation.                                                   WRH1955 
                       Aa,Ab seen single in 1953, resolved once again by McAlister in 1980.    McA1983 
                       1983.4905: Our ACFs do not resolve the system with much confidence              
                       (theta ~168 deg, rho ~0".029).                                          Bag1984a
                       Hipparcos astrometric solution adopted some elements from the orbit of  HIP1997d
                       Wright (1970).                                                          Wri1970 
                       Mk III Limb-darkened diameter  4.47  +/- 0.06  mas.                     MkT2001 
                       Mk III Limb-darkened diameter  4.362 +/- 0.044 mas.                     MkT2003 
                       NPOI Limb-darkened diameter    4.49  +/- 0.06  mas.                     NOI2001b
           GUI  30     D: 30 Cyg.                                                                      
           STFA 50     STTA204.                                                                        
                       AC: H 6  10.                                                            MEv2010 
20136+1537 BKO 535     Anon. 47.                                                               Bko2009d
20136+1205 BPM2063     [PM2000] 2224188 + [PM2000] 2224790.                                    Gvr2010 
20136-1521 HJ 5511     Originally assigned to KUI  96.                                         WSI2011b
                       Correct ID provided by Friedrich Damm.                                  Dam2013 
20136-3827 GC 28055    Hipparcos astrometric solution assumed circular orbit (e = omega = 0)   HIP1997d
20137+4050 DOO  13     A  1385.                                                                        
20137+1609 SHY 768     AC: HIP  99689 + HIP 100451. C component = B component of 20222+1623.           
20138+2021 HJ 2941     HJL 274.                                                                HJL1986 
20138+1609 BKO 536     Anon. 48.                                                               Bko2009d
20138+1450 BKO 537     Anon. 49.                                                               Bko2009d
20138+1342 BPM2064     [PM2000] 2225094 + [PM2000] 2224508.                                    Gvr2010 
20139+2358 POU4290     Also known as NYS   6.                                                          
20139+1806 BPMA242     [PM2000] 2225750 + [PM2000] 2225233.                                    Gvr2010 
20139+1751 BPM2067     [PM2000] 2225937 + [PM2000] 2225475.                                    Gvr2010 
20139+1611 BPM2065     AB: [PM2000] 2225681 + [PM2000] 2225995.                                Gvr2010 
           BPM2066     BC: [PM2000] 2225995 + [PM2000] 2225512.                                Gvr2010 
20139+0641 GIC 164     G024-010/G024-009 = GJ 784.2AB.                                                 
20140+5557 TOK   5     1984.778: This object, first resolved here, was suspected to be an              
                       astrometric binary with period about 11 years and semiamplitude about           
                       0".1 by A.A. Voltchkov.  The observed orbital motion is not                     
                       incompatible with the astrometric data.                                 Tok1985 
20140-0052 BU 1485     A,BC: Optical pair, based on study of relative motion of the                    
                       components using the method of apparent motion parameters.              Kiy2008 
           J   551     BC: Not seen after 1916.                                                        
           BU 1485     BC,D: Additional notes may be found in Jonckheere (1949).               J__1949b
           GC 28080    Combined solution, based on reduction of Hipparcos intermediate                 
                       astrometric data together with spectroscopic elements from Vogt et al.  CPS2000c
                       (2000).                                                                 HaI2001 
           BU 1485     No comoving objects found within separation/magnitude range listed.             
                       However, Chauvin et al. (2006) note finding at least one faint          Cvn2006 
                       background object.                                                              
20140-1640 HIP  99708  No RV data, the acceleration could be spurious. Elongated image?        Tok2013b
20141+2213 STF2655     AB: H N  55.                                                            MEv2010 
20141+1553 BPM2068     [PM2000] 2227104 + [PM2000] 2227074.                                    Gvr2010 
20141+1222 BPM2069     [PM2000] 2227475 + [PM2000] 2227524.                                    Gvr2010 
20142+3522 ES  204     Optical pair, based on study of relative motion of the components               
                       using the method of apparent motion parameters.                         Kiy2008 
                       SEI1032.                                                                Nsn2017d
20142+1508 BKO 538     Anon. 50.                                                               Bko2009d
20142+1202 HJ 1494     Obvious discrepancy in separation between Doolittle and WFC measures    Doo1915a
                       versus those of other observers suggest they did not observe the        WFC1998 
                       Herschel pair. Precise coordinates are those of the 9" pair; no 3"              
                       pair is found in the vicinity of Burnham's coordinates.                         
20142+0635 S   740     B is BD+06@4479.  Also known as LDS1036.                                        
                       HJL 275.                                                                HJL1986 
                       SHY 770. Bayesian analysis by Shaya & Olling (2011) indicates very      Shy2011 
                       high (near 100%) probability pair is physical.                                  
           TOK 627     AC: C and D components comprise 20156+0615 HJL 277.                             
20143+4648 ES   27     Also known as WFC 230.                                                          
20143+1648 BPM2070     [PM2000] 2228160 + [PM2000] 2227349.                                    Gvr2010 
20143+1507 BKO 539     Anon. 51.                                                               Bko2009d
20144+3822 SEI1038     J 1230. Probably J 1167. See ADS.                                       A__1932a
20144+1608 BKO 540     Anon. 52.                                                               Bko2009d
20144+1505 BKO 541     Anon. 53.                                                               Bko2009d
20144+1242 BPM2071     [PM2000] 2229049 + [PM2000] 2228314.                                    Gvr2010 
20145+3648 ENG  72     29 Cyg. A Delta Scuti-type variable, V1644 Cyg.                                 
20145+3640 RJJ   1     Aa,Ab: Primary is Wolf-Rayet WR 137, distance 1300pc. First resolved            
                       with IOTA array by Rajagopal (2010), later confirmed with  CHARA Array  RjJ2010 
                       by Richardson et al. (2016). Richardson et al. infer the following              
                       stellar parameters for the WR star and its close companion:                     
                          Spectral types:    WC7pd                 O9 V                                
                          T* (K)             60000 +/- 5000        32000 +/- 2000                      
                          log L (Lsun)       5.22  +/-0.05         4.75  +/- 0.05              .     
                          R* (Rsun)          3.8   +/- 1           7.7   +/- 1                 CIA2016b
20145+1555 BKO 542     Anon. 54.                                                               Bko2009d
20145+1502 TOB 309     Anon. 55.                                                               Bko2009d
20145+1418 BPM2072     [PM2000] 2229844 + [PM2000] 2229727.                                    Gvr2010 
20148+1439 BPM2074     [PM2000] 2231769 + [PM2000] 2231916.                                    Gvr2010 
20148+1214 BPM2073     [PM2000] 2231608 + [PM2000] 2230912.                                    Gvr2010 
20149+1808 BPM2075     [PM2000] 2232092 + [PM2000] 2232962.                                    Gvr2010 
20149-5659 RMK  25     Rectilinear solution by Letchford et al. (2018).                        Whi2018 
20150+3500 ES  205     SEI 1042. J 128.                                                                
20150+1239 BPM2076     [PM2000] 2233220 + [PM2000] 2232453.                                    Gvr2010 
20150+0835 J   552     HJL 276.                                                                HJL1986 
20151+4118 A   387     A 7" faint pair is in the field about 22" from A in 220@.               A__1932a
20151+3742 COU2416     Systemic mass is estimated at 2.8 +/- 0.7 Msun, assuming a dynamical            
                       parallax of 10.69 +/- 0.30 mas.                                         Doc2008a
20151+1552 BKO 543     Anon. 56.                                                               Bko2009d
20151+1450 BPM2077     [PM2000] 2233525 + [PM2000] 2233870.                                    Gvr2010 
20152+5409 HO  455     Hough's (1894) original component designations were altered by the      Ho_1894b
                       time the ADS was published; his A,B,C,D, and E components are now       A__1932 
                       designated A,E,D,B, and C.                                                      
20152-0330 STF2654     B is BD-03@4824.                                                                
                       Additional notes may be found in Muller (1950).                         Mlr1950b
20153+2536 BU  983     The primary may be a long-period spectroscopic binary.                          
20153+1807 BPM2079     [PM2000] 2234918 + [PM2000] 2234586.                                    Gvr2010 
20153+1145 BPM2078     [PM2000] 2234765 + [PM2000] 2234892.                                    Gvr2010 
20154+6412 SHY 772     AD: HIP  99832 + HIP  98613.                                                    
           MLR  60     AB: Malkov et al. (2012) derive dynamical, photometric, and                     
                       spectroscopic masses 1.60 +/- 0.87, 2.37, and 0.95 Msun, respectively.  Mlk2012 
20154+4743 omi2 Cyg    Hipparcos astrometric solution adopted some elements from the orbit of  HIP1997d
                       Wright (1970).                                                          Wri1970 
                       Ren & Fu (2013) calculated an astrometric orbit, combining Hipparcos    Ren2013 
                       Intermediate Astrometric Data with spectroscopic elements by                    
                       Griffin (2008).                                                         Grf2008 
20155+4743 S   743     32 Cyg = omi 2 Cyg = the 2 Cyg. A is the zeta Aurigae-type binary V1488         
                       Cyg. With a period of 1148d this cannot be this pair. B is BD+47@3060.          
                       H 6  33.                                                                MEv2010 
20155+1455 BKO 544     Anon. 57.                                                               Bko2009d
20155+1452 BKO 545     Anon. 58.                                                               Bko2009d
20156+3910 SEI1046     J 1148. ES 2048.                                                                
20156+1958 ROE 101     AB: HJL 278.                                                            HJL1986 
20156+1527 BKO 546     Anon. 59.                                                               Bko2009d
20157+4339 A  2095     Variability of one component has been suspected.                                
                       Ling (2004) derived an orbital parallax 0".01636                        Lin2004a
                       AB,C: Also known as SCA 182.                                            Sca2018b
20157+1534 BKO 547     Anon. 60.                                                               Bko2009d
20157+1509 BKO 548     Anon. 61.                                                               Bko2009d
20157+1508 BKO 549     Anon. 62.                                                               Bko2009d
20157+1457 BKO 550     Anon. 63.                                                               Bko2009d
20157+1003 J   135     J 175. J 2190. OL  193.                                                         
20158+5230 STT 404     ADS 13616a.                                                                     
20158+2749 CHR  94     23 Vul.                                                                         
                       Aa,Ab: 1991.893: These two observations confirm the discovery                   
                       measurement of this close component, made in 1985, and indicate         McA1987b
                       considerable motion during this interval.                               Hrt1994 
                       Aa,Ab: Malkov et al. (2012) derive dynamical, photometric, and                  
                       spectroscopic masses 2.39 +/- 0.73, 6.47, and 2.40 Msun, respectively.  Mlk2012 
20158+1628 BPM2080     [PM2000] 2237900 + [PM2000] 2238465.                                    Gvr2010 
20158+1536 BKO 551     Anon. 64.                                                               Bko2009d
20158+1510 BKO 552     Anon. 65.                                                               Bko2009d
20159+1505 BKO 553     Anon. 66.                                                               Bko2009d
20159+1457 BKO 554     Anon. 67.                                                               Bko2009d
20160+1819 BPMA243     [PM2000] 2239594 + [PM2000] 2238354.                                    Gvr2010 
20160+1510 BKO 555     Anon. 68.                                                               Bko2009d
20161+3854 CHR  95     Hipparcos Acceleration Double Solution.                                         
                       This system, first announced by McAlister and recalled in a later       McA1984b
                       McAlister paper after repeated attempts at confirmation, has been       McA1993 
                       restored. While perhaps still spurious, the subsequent confirmation or          
                       suspected duplicity (by another technique) makes the discovery                  
                       measurement somewhat more probable.                                             
20161+1553 BKO 556     Anon. 69.                                                               Bko2009d
20161+1552 BKO 557     Anon. 70.                                                               Bko2009d
20163+1407 BPM2082     [PM2000] 2241196 + [PM2000] 2241835.                                    Gvr2010 
20163+1353 BPM2081     [PM2000] 2241007 + [PM2000] 2241190.                                    Gvr2010 
20163+1343 BPM2083     [PM2000] 2241217 + [PM2000] 2241516.                                    Gvr2010 
20164-1220 BU  294     3 Cap.                                                                          
20165+4339 ES 1439     FOX 40.                                                                         
20165+3739 BU  442     R is BD+37@3859.                                                                
           SLE 982     AL:  Soulie (2006) measure corrected for an apparent 30" error in       Sle2006b
                       declination of L component.                                                     
                       AQ: Additional notes may be found in Doolittle (1901).                  Doo1901 
                       Confusion is component designations: BO was initially listed as BD,             
                       BD as BW, and CD as CW.                                                         
20165+3739 BU  442     Confusion is component designations: BO was initially listed as BD,             
                       BD as BW, and CD as CW.                                                         
                       AB: SEI1055.                                                            Nsn2017d
           SLE 982     AL:  Soulie (2006) measure corrected for an apparent 30" error in       Sle2006b
                       declination of L component.                                                     
           BU  442     AP: SEI1052.                                                            Nsn2017d
                       AQ: Additional notes may be found in Doolittle (1901).                  Doo1901 
                       AR: SEI1053.                                                            Nsn2017d
                       BC: SEI1054.                                                            Nsn2017d
                       BD: SEI1057.                                                            Nsn2017d
                       BT: SEI1058.                                                            Nsn2017d
                       BU: SEI1056.                                                            Nsn2017d
20165+1602 BKO 558     Anon. 71.                                                               Bko2009d
20165+1601 BKO 559     Anon. 72.                                                               Bko2009d
20165-7011 HEI 274     CD given, not in CPD.                                                   Hei1985a
20166+1431 BPM2085     [PM2000] 2243469 + [PM2000] 2242918.                                    Gvr2010 
20166+1138 BPM2084     [PM2000] 2243057 + [PM2000] 2242845.                                    Gvr2010 
20166+0405 J  1641     BAL 2530.                                                                       
20166-0712 JNN 125     Due to the very small separation of the detected companion to 2MASS             
                       J20163382-0711456, this is likely to be a physical binary, although a           
                       second epoch to confirm common proper motion has not been acquired.     Jnn2012 
20167+2932 OSO 121     G186-018. Neither AB nor AC is a common proper motion pair              Oso2004 
20167+2425 BRT3356     POU4333. Originally published as BRT 212.                               Brt1928 
20167+1925 GCB  52     Heintz confirm J  3069 as identical, and corrects both positions.       Hei1983a
20167+1459 BPM2086     [PM2000] 2243647 + [PM2000] 2243201.                                    Gvr2010 
20168+4158 ES 1568     A is a W UMa-type system, V1191 Cyg.                                            
20168+3943 STF2663     AB: SEI1062.                                                            Nsn2017d
                       WDS 20167+3938 = HO  590AB and AC were incorrectly merged with this             
                       system and designated as the CD and CE pairs.                                   
20168-0329 TOK 337     AC: C is white dwarf candidate (Tokovinin & Lepine (2012))              Tok2012c
20169+5017 ENG  73     AB, AC, and AE: Optical pairs, based on study of relative motion of             
                       the components using the method of apparent motion parameters.          Kiy2008 
                       A: Hipparcos astrometric solution assumed circular orbit (e=omega=0).   HIP1997d
                       A: Ren & Fu (2013) calculated an astrometric orbit, combining                   
                       Hipparcos Intermediate Astrometric Data with spectroscopic elements by          
                       Griffin (2002). They derived component masses 0.90 and 0.74 Msun and    Grf2002a
                       an estimated semimajor axis of 38.89 mas.                               Ren2013 
                       AB: A is SB1 (CfA: P=418.6d=1.146yr) and astrometric binary (Ren & Fu   Ren2013 
                       2013). B is SB1, P=3.616d                                               Tok2014d
           GIC 155     AF: G230-032/G230-031. A typographical error led to this pair being             
                       originally entered in the WDS as 19168+5014.                                    
           BUP 243     DF: Originally listed in the WDS erroneously as DH.                             
20169+3307 OSO 122     G210-012. Neither AC nor AD is a common proper motion pair, based on            
                       comparison with POSS2 red plates                                        Oso2004 
20170+3725 CIA   9     Aa1,Aa2: Primary is Wolf-Rayet WR 138, distance 1380pc. Resolved with           
                       CHARA Array by Richardson et al. (2016), who infer the following                
                       stellar parameters for the WR star and its close companion:                     
                          Spectral type      WN5o                  O9 V                                
                          T* (kK)            56000 +/- 5000        31000 +/- 2000                      
                          log L (Lsun)       5.35  +/- 0.05        4.82  +/- 0.05              .     
                          R* (Rsun)          4.8   +/- 2           8.9   +/- 2                 CIA2016b
20170+3153 SEI1061     Heintz identifies this with ES 2432.                                    Hei1995 
20170+1716 OSO 123     G143-043. None is a common proper motion pair, based on comparison              
                       with POSS2 red plates.                                                  Oso2004 
20171+1641 BPM2087     [PM2000] 2246373 + [PM2000] 2246561.                                    Gvr2010 
20171+1434 BPMA244     [PM2000] 2246248 + [PM2000] 2248348.                                    Gvr2010 
20172+1553 BKO 560     Anon. 73.                                                               Bko2009d
20172+1446 BPM2088     [PM2000] 2246994 + [PM2000] 2246829.                                    Gvr2010 
20173+3420 SEI1064     B is BD+33@3839.                                                                
20173+2604 BRT3357     Originally published as BRT 213.                                        Brt1928 
20174+1430 BPM2089     [PM2000] 2248646 + [PM2000] 2248440.                                    Gvr2010 
20175+3205 SEI1065     BRT 278.                                                                Brt1929b
                       J  1169.                                                                Nsn2016 
20176+3835 ALI 927     Aka MLB 952.                                                                    
20176+1224 BPM2090     [PM2000] 2249560 + [PM2000] 2249051.                                    Gvr2010 
20176-1230 WZ   15     Aa,Ab: Previously known as HDS2895Aa,Ab. The Wirtz measure which had    Wz_1912 
                       been assigned to Aa,Ab belongs here.                                            
           BU  295     A: alp 1 Cap = 5 Cap, a spectroscopic binary. Wilson measured a star            
                       nearby: 1882.62, 96.3@, 8.32", 9.0-9.5. Not found by Burnham in 1902.           
           HJ  607     Also known as DA   16EF (as part of the system HJ  608 = ADS 13645).            
20177+1755 J  1340     Published in JO XXIV, 21 as J 1370. Jonckheere calls it 1340 in his     J__1941a
                       1962 catalogue.  Thorel (private comm.) says J 1370 is a novae,         J__1962a
                       however.                                                                        
20177+1739 BPMA245     [PM2000] 2250029 + [PM2000] 2249323.                                    Gvr2010 
20177+1504 BPM2091     [PM2000] 2250170 + [PM2000] 2250690.                                    Gvr2010 
20177+1429 BPM2092     [PM2000] 2250573 + [PM2000] 2250205.                                    Gvr2010 
20178+3956 HJ 2951     AB: SEI1074.                                                            Nsn2017d
20178+3802 P Cyg       1975.636: Disk unresolved in H alpha emission but resolved (0".020              
                       +/- 0".008) in H beta emission.                                         Bla1977a
                       1976.402: Disk resolved (0".022 +/- 0".006) in H beta emission.         Bla1977a
20178+1417 BPM2093     AB: [PM2000] 2251022 + [PM2000] 2251813.                                Gvr2010 
           BPM2094     BC: [PM2000] 2251813 + [PM2000] 2251414.                                Gvr2010 
20179+1520 SMA 116     It was initially thought that SMA 116 = CHE 290, but SMA 116 has been           
                       assigned to another, more likely pair.                                          
20179+0040 BAL1214     J  3207.                                                                        
20180+3613 SEI1073     J  1147.                                                                        
20180+3311 HO  592     BAR  54.                                                                        
20180+1325 BPM2095     [PM2000] 2252360 + [PM2000] 2252349.                                    Gvr2010 
20181+4122 ES 1674     The listed spectral type for this system is B0, however, colors from            
                       Daley suggest a very red primary with a closely matching secondary.     Dal2007 
                       V-I for primary (secondary) is 1.72(1.71).                                      
20181+4044 CHR  96     Aa,Ab: 1985.8396, 1988.6630, 1989.7061: These new observations were             
                       found from reprocessing unpublished archival data. We are currently     McA1993 
                       undertaking a duplicity survey of all bright (V<8) galactic O stars;            
                       this is one of four new binaries found by us so far in this survey.     McA1987a
                       This system is also a known spectroscopic binary, and we are                    
                       reanalyzing archival radial velocity data in an attempt to derive               
                       masses via a combined interferometric/spectroscopic orbit (see Gies et  Gie1993 
                       al. 1993 for a similar combined solution of the O star 15 Mon).                 
                       The estimated period of the speckle binary orbit (CHR 96 Aa) is 31 y.           
                       The orbit quality rating in Table 1 is our own.  The system is                  
                       currently unresolved with the Mt. Wilson Hooker telescope, but we               
                       continue to observe this target.  The brighter star of the speckle              
                       pair is also a 311-day, single-lined spectroscopic binary (McKibben et  Bgn1998 
                       al. 1998).  The classifications of the C and D components are from      Hof1991 
                       Hoffleit & Warren (1991).                                               Msn1998a
                       Cluster/Main-Sequence fitting determines a cluster distance of          Rbr2010b
                       741 +/- 36 pc.                                                                  
           CHR  96     ten Brummelaar et al. (2011) use a combination of spectroscopic and     CIA2011b
           CIA   6     astrometric data, including speckle and CHARA Array long-baseline               
                       interferometry, to derive orbits for both the Aa,Ab and Ab1,Ab2 pairs.          
                       Masses for Aa, Ab1, and Ab2 are 21, 23, and 9 Msun, respectively,               
                       effective temperatures are 33, 32.5, and 20 kK.                                 
                       Distance to Collinder 419 is 1006(+37-34) pc, yielding a mass sum of    MzA2019b
                       76.1(+9.9-7.4) \msun.                                                           
20181+1605 BKO 561     Anon. 74.                                                               Bko2009d
20181+1555 J   553     Also known as CHE 288.                                                          
20181+1519 CHE 290     It was initially thought that SMA 116 = CHE 290, but SMA 116 has been           
                       assigned to another, more likely pair.                                          
20181+1452 BPM2096     [PM2000] 2253046 + [PM2000] 2253052.                                    Gvr2010 
20181-1233 HJ  608     A: alp 2 Cap = 6 Cap = Algedi                                                   
                       Aka H 6   4 = SHJ 319.                                                  Bu_1906 
           STFA 51AE   E component is A of 20176-1230 but non-physical, so not merged.                 
20182+2319 POU4348     AB: Rectilinear solution by Friedman et al. (2011).                     USN2011a
20182+1504 BPM2097     [PM2000] 2253336 + [PM2000] 2253310.                                    Gvr2010 
20183+3825 ES 2049     OL  181.                                                                        
20183+2539 BU  985     A is a spectroscopic binary.                                                    
20183+1508 BPM2098     [PM2000] 2254089 + [PM2000] 2254981.                                    Gvr2010 
20184+5524 STF2671     AB: H 1  95.                                                            MEv2010 
                       Both A and B are spectroscopic binaries.                                        
20184+1719 BPM2099     [PM2000] 2254727 + [PM2000] 2255457.                                    Gvr2010 
20185+6313 HJ 2958     STI 963.                                                                        
20185+1519 BPM2100     [PM2000] 2255235 + [PM2000] 2255961.                                    Gvr2010 
20185+0626 J  2191     J 3219.                                                                         
20186+4136 ES 1675     Not found by Heintz.                                                    Hei1995 
                       Aka TDT2156.                                                            Dam2013 
20186+1711 BPM2101     [PM2000] 2256011 + [PM2000] 2255598.                                    Gvr2010 
20186+1600 BPM2102     [PM2000] 2256240 + [PM2000] 2256598.                                    Gvr2010 
20188+5212 ES 2692     B is BD+51@2832.                                                                
20188+3620 SEI1077     A is the Beta Lyrae-type system V382 Cyg.                                       
20188+3507 A   286     AB: Rectilinear solution by Rica & Zirm (2012).                         FMR2012i
20189+3817 A  1425     AB: The classification is from Conti et al. (1977) and refers to the    Cti1977 
                       combined AB pair.                                                       Msn1998a
20189+3635 BKO 562     Anon. 75.                                                               Bko2009d
20190+1540 BPM2103     [PM2000] 2258256 + [PM2000] 2258261.                                    Gvr2010 
20190+1530 BKO 563     Anon. 76.                                                               Bko2009d
20190+1526 BPM2104     [PM2000] 2258557 + [PM2000] 2257972.                                    Gvr2010 
20191+1647 BPM2105     [PM2000] 2259092 + [PM2000] 2258511.                                    Gvr2010 
20191-1947 BHA  38     CPD-20@7832.                                                                    
20192+3235 KLT  21     A has a hot jupiter with P ~ 3.613d and a radius of 1.586(0.040) \rJup  KLT2018 
                       A properties: Teff = 7598 +/- 83 K, M = 2.458 +/- 0.029 \msun,                  
                       R = 1.638 +/- 0.034 \rsun.                                                      
                       Projected separation of AB, AC, BC = 523(62), 504(60), 22.9(7.1) au.            
                       Mass of B,C = 0.13(0.02), 0.11(0.01) \msun.                                     
20192+1753 BPM2106     [PM2000] 2259658 + [PM2000] 2259767.                                    Gvr2010 
20192+1517 BPM2107     [PM2000] 2259927 + [PM2000] 2259448.                                    Gvr2010 
20193+3641 BKO 564     Anon. 77.                                                               Bko2009d
20193+3635 AG  253     AB: SEI1082.                                                            Nsn2017d
20193+1705 BPM2109     [PM2000] 2260163 + [PM2000] 2259940.                                    Gvr2010 
20193+1619 BPM2108     [PM2000] 2260136 + [PM2000] 2259430.                                    Gvr2010 
20194+5607 STF2669     B is BD+55@2372.                                                                
20194+3644 BKO 565     Anon. 78.                                                               Bko2009d
20194+1507 BPM2110     [PM2000] 2260873 + [PM2000] 2260336.                                    Gvr2010 
20194+1422 STF2665     A, HD 193349/50, is a 1071 d spectroscopic binary whose secondary may   REG2018 
                       be a former binary who is now merged.                                           
20194-1907 H 5  87     H V 87. SHJ 380. sig Cap = 7 Cap. B is BD-19@5777.                              
20195+1223 BPM2111     [PM2000] 2261276 + [PM2000] 2260645.                                    Gvr2010 
20196+6215 GUL   2     Also an unresolved 5.298d spectroscopic binary.                         Mug2017b
20196+4754 BLL  49     A is the Mira-type variable U Cyg. B is BD+47@3078.                             
20196+3820 A  1426     A is the Algol-type system V478 Cyg.                                            
20196+1502 BPM2112     [PM2000] 2262181 + [PM2000] 2262893.                                    Gvr2010 
20197+4108 STTA205     B is BD+40@4120.                                                                
20197+1507 BPM2113     [PM2000] 2262593 + [PM2000] 2262628.                                    Gvr2010 
20197+1333 BPM2114     [PM2000] 2262698 + [PM2000] 2262468.                                    Gvr2010 
20197-2138 BRT1562     CD-22@14621.                                                                    
20198+4522 STT 406     Malkov et al. (2012) derive dynamical, photometric, and spectroscopic           
                       masses of 2.33 +/- 1.30, 2.47, and 1.35 Msun, respectively.             Mlk2012 
20199+3933 HO  593     Also known as SEI1086.                                                          
20199-0215 STF2661     B is BD-02@5239.                                                                
20200+1412 BPM2115     [PM2000] 2264323 + [PM2000] 2264225.                                    Gvr2010 
20201+3700 SEI1087     AC: Also known as ALI 422.                                                      
20201+2338 HD193554    Hipparcos astrometric solution assumed circular orbit (e = omega = 0)   HIP1997d
                       Spectroscopic solution to these astrometric pairs given by Griffin      Grf2013a
                       (2013). Periods match "tolerably well," other common elements less so.          
20202+1734 BPM2116     [PM2000] 2265784 + [PM2000] 2266248.                                    Gvr2010 
20202-1046 J  1389     J 1771.                                                                         
20202-2908 GLP  18     B is CD-29@16976.                                                               
20203+3924 A  1427     Spectral types and masses of components assigned by ten Brummelaar et           
                       al., based on adaptive optics observations.                             TtB2000 
20203+3919 BKO 566     Anon. 79.                                                               Bko2009d
20203+1525 BPM2117     [PM2000] 2265937 + [PM2000] 2266480.                                    Gvr2010 
20203+1350 BPM2118     [PM2000] 2266391 + [PM2000] 2266776.                                    Gvr2010 
20203+1036 TOR  23     Formerly known as PAN  20.                                                      
20204+1447 BPM2119     [PM2000] 2266622 + [PM2000] 2266983.                                    Gvr2010 
20204+1427 BPM2120     [PM2000] 2266848 + [PM2000] 2267027.                                    Gvr2010 
20205+4351 BU 1207     Spectrum: WC6/7+O5/6; classification from Smith (1968 MNRAS 138, 109).  Msn1998a
                       Variable, V1687 Cyg = WR 140. Large IR variations associated with               
                       circumstellar dust shell.                                                       
                       May be a long-period spectroscopic binary.                                      
                       AB and TRN  29AC: The image rotator was in an unknown state, so no              
                       theta values were determined for the 2001.7447 observations.            Trn2008 
                       Dust forms near periastron and quickly dissipates. Polarization appears IAU2014b
                       related to the dust formation.                                                  
20205+4351 IOT   2     Aa,Ab: Monnier et al (2011) derive a distance of 1.60 +0.11/-0.07 kpc;          
                       masses for the WR and O star are 13.9 +1.9/-1.2 and 33.1 +4.5/-2.8              
                       Msun, respectively.                                                     CIA2011d
20205-2912 HJ 5188     B is BD-29@16981.                                                               
20206+3917 BKO 567     Anon. 80.                                                               Bko2009d
20206+3726 SEI1093     No Astrographic Catalog objects near Scheiner's coordinates and         Sei1908 
                       no obvious binary in field - typo in original catalog?                          
20206+1519 BPM2122     [PM2000] 2267984 + [PM2000] 2268719.                                    Gvr2010 
20206+1254 BPM2121     [PM2000] 2267950 + [PM2000] 2267350.                                    Gvr2010 
20206-5844 HJ 5185     Optical pair, based on study of relative motion of the components               
                       using the method of apparent motion parameters.                         Kiy2008 
20207-1246 LAM   5     nu Cap = 8 Cap = Alshat                                                         
20208+3922 BKO 568     Anon. 81.                                                               Bko2009d
20209+1604 BPM2123     [PM2000] 2269461 + [PM2000] 2269687.                                    Gvr2010 
20210+4437 A   725     Erratum to Ling (1989) orbit noted in IAU Circ 113, 1991: Omega = 50.2  Lin1989a
20210+1033 TOR  24     Formerly known as PAN  21.                                                      
20210+1028 J   838     Pair is 4s after BD+10 4257.                                            J__1948 
20210-1447 BLA   7     Aa,Ab: bet 1 Cap = Dabih. A is an occultation and interferometric               
                       binary, and is physical with the multiple system STFA 52 at 205".               
                       First detected as an occultation binary by Evans & Fekel (1979),        Evn1979 
                       who derive an orbit based upon spectroscopic, occultation, and                  
                       interferometric observations.                                                   
                       Period and eccentricity for Mason et al. (1994) orbit adopted from      Msn1994 
                       Evans & Fekel (1979); other elements generated from occultation and             
                       speckle data.                                                                   
                       Hipparcos astrometric solution adopted some elements from the orbit of  HIP1997d
                       Evans & Fekel (1979).                                                           
                       Alden (1936) orbit adopted P, T, and e from the spectroscopic orbit     Ald1936b
                       of Spencer Jones (Ann. Cape Obs. 10, pt. 8, 76, 1928)                           
                       Alden orbit rejected from Fourth Orbit Catalog                          Wor1983 
                       ("object still suspected to be binary by some, but no even                      
                       approximately reliable or complete elements yet available")                     
           STFA 52     AB: H 6  28.                                                            MEv2010 
                       A: bet 1 Cap = 9 Cap                                                            
                       B: bet 2 Cap                                                                    
           HJ 2948     AD: mistakenly listed as BD pair.                                               
           BAR  12     Ba,Bb: Physical with bet Cap. A is an 8.7d SB and may eclipse; it is            
                       also an occultation double.                                                     
                       Ba,Bb: Additional notes may be found in Barnard (1898).                 Bar1898b
20212+1553 BPM2124     [PM2000] 2271412 + [PM2000] 2271833.                                    Gvr2010 
20213+3758 LDS1040     AC: Originally 20214+3758 LDS1040; found to share primary with                  
                       20213+3758 SEI1098, so systems merged.                                          
20213+0250 HLD 158     Misidentified in IDS as BD+02 4138 rather than +02 4139. Position and           
                       proper motion corrected.                                                        
                       Pair called "too close" by van den Bos in 7 nights in 1961 and 1962.    Wor1967b
                       Confirms comment by Couteau that BD+02 4138 7s s is single.             Mrl1968a
                       Meas attributed to ADS 13738 = BD+02 4138 appear to match this pair.    Mrl1970d
                       This is BD+02 4139, observed my Morel (1968). Coordinates are those             
                       given by Aitken for ADS 13738 = HLD 158 = BD+02 4138 -7s, which was             
                       found to be single. Probably ADS 13738 = BD+02 4139.                    Cou1970c
20214+3656 BLL  50     A is the irregular variable BI Cyg. B is BD+36@4028.                            
20215+1511 BPM2125     [PM2000] 2272762 + [PM2000] 2272661.                                    Gvr2010 
20216+1930 COU 327     Measures by ISM are anomalous. A preliminary visual orbit gives:        Ism1992 
                       P =35y, a = 0.16", motion direct.                                               
                       One component is a spectroscopic binary, P = 70.53d.                            
                       Systemic mass is estimated at 3.0 +/- 0.7 Msun, assuming an estimated           
                       parallax of 8 +/- 2 mas.                                                Doc2008a
20216+1556 BPM2127     [PM2000] 2273651 + [PM2000] 2273461.                                    Gvr2010 
20216+1546 BPM2126     [PM2000] 2273365 + [PM2000] 2273135.                                    Gvr2010 
20216-5449 COO 239     A is SB, no orbit.                                                      Tok2014d
20218+1729 BPM2128     [PM2000] 2274797 + [PM2000] 2274310.                                    Gvr2010 
20219+1504 BPM2129     [PM2000] 2274995 + [PM2000] 2275260.                                    Gvr2010 
20220-1854 DON1119     BHA 39.                                                                         
20221+4548 HR 7798     Ren & Fu (2013) calculated an astrometric orbit, combining Hipparcos    Ren2013 
                       Intermediate Astrometric Data with spectroscopic elements by                    
                       Griffin & Eitter (2000).                                                Grf2000 
20221+1501 BPM2130     [PM2000] 2276024 + [PM2000] 2275965.                                    Gvr2010 
20221+1117 BPM2131     [PM2000] 2276098 + [PM2000] 2276075.                                    Gvr2010 
20222+4015 BU  665     gam Cyg = 37 Cyg = Sadr                                                         
20222+2116 BRT2470     Not found by Heintz at IDS position.                                    Hei1990b
20222-1647 H N 138     BDS 10151 same star.                                                            
20223+4748 HJ 1510     E is A of HJ 1511. Opik also measures a wide pair 5'in 90@ from AD:     Opi1927 
                       230@ +/-, 35" +/-, 9.1-10.6.                                                    
20223+3326 OSO 124     G210-016. None is a common proper motion pair, based on comparison              
                       with POSS2 red plates.                                                  Oso2004 
20224+2006 BUP9009     Primary is variable NT Del, central star of planetary nebula NGC 6905.          
20224+1745 BPM2132     [PM2000] 2277987 + [PM2000] 2277362.                                    Gvr2010 
20224-1841 B   479     SEE.                                                                            
20224-2014 ARG  38     CPD-20@7864.                                                                    
20225-4203 HJ 5190     kap 1 Sgr                                                                       
                       AC: Optical pair, based on study of relative motion of the components           
                       using the method of apparent motion parameters.                         Kiy2008 
20226+1529 BPM2133     [PM2000] 2278642 + [PM2000] 2278714.                                    Gvr2010 
20226-1223 H N 127     See BDS Vol. II for note.                                                       
20227+6224 STI 973     Aka TDT2217.                                                            Dam2013 
20227+1406 BPM2134     [PM2000] 2279324 + [PM2000] 2278861.                                    Gvr2010 
20228+1156 BPM2135     [PM2000] 2279726 + [PM2000] 2279390.                                    Gvr2010 
20229+4259 HO  128     B is called variable in the Bright Star Catalogue. This is doubtful.            
           STTA207     Statistically the same parallax within the errors would indicate the            
                       components are physical.                                                        
20229+2707 ARN  50     AD: HJL 279.                                                            HJL1986 
20229+1728 BPMA246     [PM2000] 2280409 + [PM2000] 2279731.                                    Gvr2010 
20230+3913 STTA206     B is BD+38@4050.                                                                
20230+1533 BPM2136     [PM2000] 2280889 + [PM2000] 2280389.                                    Gvr2010 
20231+5745 STI2523     LDS1472.                                                                        
20231+5504 OL   74     Although listed as a measure of OL   77 by Olivier (1920), neither      Ol_1920a
                       the coordinates nor the measure agreed with that pair, so it has been           
                       assigned a new designation. Previously listed in the WDS as OL   80.            
                       Although this measure (40.7deg, 3.79") could conceivably be a measure           
                       of OL   80 with a 100deg theta error (expected values are about                 
                       140deg, 3.5"), the near-zero magnitude difference does not agree with           
                       the ~2 magnitude estimates for OL   80. Finally, the coordinates of             
                       OL   80 are 18547-1946, making such a misidentification implausible.            
20231+4047 J   787     CD. This pair was previously known as BU 1487CD, however Burnham        Bu_1913 
                       actually measured STTA207CD at 20229+4259.                                      
20231+2052 A   288     Malkov et al. (2012) derive dynamical, photometric, and spectroscopic           
                       masses of 5.25 +/- 4.58, 4.10, and 1.35 Msun, respectively.             Mlk2012 
20231+1508 BPM2137     [PM2000] 2281737 + [PM2000] 2281548.                                    Gvr2010 
20232+3542 HJ 1506     AB: SEI1108.                                                            Nsn2017d
20233+6710 LAW  19     LSPM J2023+6710 = NLTT 49224. Law et al (2008) derive a distance of     Law2008 
                       13.6 +5.9/-2.5 pc and a projected separation of 12.8 +6.5/-2.6 au.              
                       Estimated spectral types are M5 and M5.                                         
20233+1515 BPM2138     AB: [PM2000] 2282543 + [PM2000] 2282550.                                Gvr2010 
           BPM2139     AC: [PM2000] 2282543 + [PM2000] 2282527.                                Gvr2010 
           BPM2140     BD: [PM2000] 2282550 + [PM2000] 2282126.                                Gvr2010 
20234+3053 ARG  91     B is BD+30@4010a.                                                               
20236+1421 BPM2141     [PM2000] 2284047 + [PM2000] 2284166.                                    Gvr2010 
20238+3830 BUP 209     A is the irregular variable V1322 Cyg. C is BD+38@4062.                         
20239+4655 PLT   9     ZZ Cyg.                                                                 Plt1934 
20239+1107 BPM2142     [PM2000] 2286055 + [PM2000] 2286221.                                    Gvr2010 
20239-4225 BU  763     kap 2 Sgr                                                                       
20240+1443 BPM2143     [PM2000] 2286627 + [PM2000] 2286267.                                    Gvr2010 
20241+2453 POU4448     POU4450.                                                                        
20242+3516 ES 2303     Aka POP 202.                                                            Dam2013 
20243+1617 BPM2144     [PM2000] 2287920 + [PM2000] 2288313.                                    Gvr2010 
20244+2417 COU 125     1998.65: Absolute quadrant determined by triple-correlation techniques  Pru2002b
20245+0916 HJ 2959     J 1881.                                                                         
20246+4842 ES 2694     Hipparcos suspected non-single.                                                 
20246+1459 BPM2145     [PM2000] 2289896 + [PM2000] 2290028.                                    Gvr2010 
20246+0531 BU  664     H. Struve notes a 12th magnitude star at 9.2@, 20".                             
20246+0104 STF2677     Aka H 5  35. BDS 10170.                                                 Bu_1906 
20247+1747 BPMA247     [PM2000] 2290330 + [PM2000] 2291140.                                    Gvr2010 
20247+1438 HJ 1507     This is identical with BDS 10185, HJ 1508. Pair is 14s p and 7' n of            
                       BD+14 4285.                                                             Doo1915a
20248+8636 LDS1935     NLTT 49600/49597.                                                               
20248+4009 HO  278     BD+39 4172. Pair was first taken to be a new pair, as Hough (hence              
                       Burnham in BDS) identified discovery as BD+39 4186, a star of about             
                       the same mag about 1m f and 15' n of double. The doubtless accounts             
                       for Doolittle's failure to secure measures in 1905.                     A__1914d
20248+2503 OSO 125     G186-026.                                                                       
20249+1309 J   841     Not seen by any observer other than Jonckheere since discovery.         J__1912g
20250+1443 BPM2147     [PM2000] 2291857 + [PM2000] 2292356.                                    Gvr2010 
20250+1108 BPM2146     [PM2000] 2291671 + [PM2000] 2292066.                                    Gvr2010 
20251+5936 A   730     Malkov et al. (2012) derive dynamical, photometric, and spectroscopic           
                       masses of 6.38 +/- 3.96, 4.95, and 2.19 Msun, respectively.             Mlk2012 
20252+1416 BPM2148     [PM2000] 2292741 + [PM2000] 2293159.                                    Gvr2010 
20253+1609 BPM2150     [PM2000] 2293480 + [PM2000] 2292923.                                    Gvr2010 
20253+1420 BPM2149     [PM2000] 2293274 + [PM2000] 2293173.                                    Gvr2010 
20254+4014 MLR   1     Muller suggests the observation attributed by Aitken in 1906 to HO 278          
                       (34s p and 4' s) actually is of this pair.                              Baz1954a
20254-2840 CHR  97     Also a spectroscopic binary with P = 377.6d (Bopp et al. (1970 MNRAS,           
                       147, 355). The correspondence of this component with the spectroscopic          
                       system can only be established by further observation.                          
                       1983.4258: This autocorrelogram was remeasured; the new results are             
                       listed here.                                                                    
20255+5434 GIC 157     G230-039/G230-038. LDS6341. A typographical error led to this pair              
                       being originally entered in the WDS as 19252+5430.                              
20255+1555 BPM2152     [PM2000] 2294827 + [PM2000] 2294524.                                    Gvr2010 
20255+1431 BPM2151     [PM2000] 2294520 + [PM2000] 2294256.                                    Gvr2010 
20256+2723 J  2310     A is the Algol-type system BE Vul.                                              
20256+2642 BU 1488     B is BD+26@3898.                                                                
20256-5644 HJ 5193     alp Pav = Peacock. A is a spectroscopic binary.                                 
                       Intensity Interferometer Limb-darkened diameter 0.80 +/- 0.05 mas.      HBr1974 
20257+4004 TOR  25     Formerly known as PAN  22.                                                      
20257+2258 BRT2474     Not found by Heintz.                                                    Hei1995 
20257+1510 BPM2153     [PM2000] 2295705 + [PM2000] 2296242.                                    Gvr2010 
20257+0304 BAL2024     Due to a typographical error, this pair was previously listed as                
                       22058+0313.                                                                     
20259+3914 SEI1122     SEI1124.                                                                Nsn2017d
20259+1549 BPM2154     [PM2000] 2297041 + [PM2000] 2296791.                                    Gvr2010 
20260+3414 COU1953     TDT2267.                                                                        
20260+1257 BPM2155     [PM2000] 2297163 + [PM2000] 2297560.                                    Gvr2010 
20260+1102 BPM2156     AB: [PM2000] 2297545 + [PM2000] 2297853.                                Gvr2010 
           BPM2157     BC: [PM2000] 2297853 + [PM2000] 2298536.                                Gvr2010 
20261+2910 MLB 479     Heintz believes HJ 1512 is probably identical.                          Hei1985a
20262+1721 BPM2158     [PM2000] 2298374 + [PM2000] 2297717.                                    Gvr2010 
20262-6551 B   989     The middle of three stars, all given in the Draper Catalog but only             
                       one in the CPD; the preceding also G0, the following and brighter K2.   B__1928b
20263+3728 AG  255     SEI1126.                                                                Nsn2017d
20264+5638 STF2687     H N  89.                                                                MEv2010 
                       A spectroscopic binary. B is BD+56@2422.                                        
20264+5402 FRK   9     B is BD+53@2404.                                                                
20264+1103 BPM2159     AB: [PM2000] 2299757 + [PM2000] 2299966.                                Gvr2010 
           BPM2160     AC: [PM2000] 2299757 + [PM2000] 2299958.                                Gvr2010 
20266+1148 BPM2161     [PM2000] 2300858 + [PM2000] 2300664.                                    Gvr2010 
20266-3955 SCT   2     B is CD-40@13861.                                                               
20267+1431 BPM2162     [PM2000] 2301154 + [PM2000] 2300920.                                    Gvr2010 
20269+1747 BPM2163     [PM2000] 2301992 + [PM2000] 2302355.                                    Gvr2010 
20269+1727 BPM2164     [PM2000] 2302089 + [PM2000] 2302325.                                    Gvr2010 
20270+1736 BPM2167     [PM2000] 2302950 + [PM2000] 2302653.                                    Gvr2010 
20270+1541 BPM2165     [PM2000] 2302579 + [PM2000] 2302562.                                    Gvr2010 
20270+1312 BPM2166     [PM2000] 2302677 + [PM2000] 2302801.                                    Gvr2010 
20271+1549 BPM2168     [PM2000] 2303338 + [PM2000] 2303898.                                    Gvr2010 
20272+1306 BPM2169     [PM2000] 2303974 + [PM2000] 2303799.                                    Gvr2010 
20273-1813 CHR 184     Aa,Ab: pi Cap = 10 Cap. The suspected radial velocity variation may             
                       well be explained by the close pair.                                            
                       Abt & Biggs (1972) note variable RV.                                    AbH1972 
20275-0206 S   749     AB: B is BD-02@5282.                                                            
                       AB: HJL 280.                                                            HJL1986 
                       AB: SHY 331. Bayesian analysis by Shaya & Olling (2011) indicates very  Shy2011 
                       high (near 100%) probability pair is physical.                                  
                       This cannot be the close 160.8-d spectroscopic binary.                  Grf2014b
                       AB: A is SB2, P=160.83d (Halbwachs et al. 2012)                         HJL2012b
                       AC: H 5  35.                                                            MEv2010 
20275-0734 LDS5906     LDS6342.                                                                        
20277+3605 ES 2193     AD: SEI1128.                                                            Nsn2017d
20277+0803 HJ 2966     Aka J  1298.                                                            Dam2013 
20278+0311 HJ  917     BAL2026.                                                                        
20279+1515 BPMA248     [PM2000] 2307738 + [PM2000] 2307024.                                    Gvr2010 
20279+0958 AG  256     1s f and 7' n of BD-07 5308.                                            Doo1915a
20280+1624 BPM2170     [PM2000] 2308128 + [PM2000] 2307893.                                    Gvr2010 
20280-0009 SHY 333     BC: HIP 100940 + HIP 101852.                                                    
20280-4237 RSS  36     This previously uncataloged double star was a Hipparcos double entry            
                       system.  The first measure is determined from the individual positions          
                       listed by Rousseau et al.                                               Rss1996 
                       SHY 776. Bayesian analysis by Shaya & Olling (2011) indicates very      Shy2011 
                       high (near 100%) probability pair is physical.                                  
20281+0140 BAL1560     J 1774.                                                                         
20282+8125 BUP 211     75 Dra.                                                                         
20283+1846 HO  131     HIP 100970. See Allen et al. (2000) for information on metallicity,     AlC2000 
                       age, galactic orbital parameters, etc.                                          
                       AC: Optical pair, based on study of relative motion of the components           
                       using the method of apparent motion parameters.                         Kiy2008 
                       AB: Primary is exoplanet host, P=18.2d, and acceleration binary in HIP  Tok2014d
           GC 28482    A: Combined solution, based on reduction of Hipparcos intermediate              
                       astrometric data together with spectroscopic elements from Fischer      CPS1999c
                       et al. (1999).                                                          HaI2001 
20284+5430 STF2693     B is BD+54@2357.                                                                
20284+3007 OL   75     Aka TDT2310.                                                                    
20284+0746 BRT2186     Aka J  1299.                                                            Dam2013 
                       J  3345. Damm match to J  1299 believed incorrect.                      Nsn2016 
20284-0321 RST4667     68 Aql.                                                                         
20284-1309 STF2683     B is BD-13@5678.                                                                
20285+1110 BPM2171     [PM2000] 2310876 + [PM2000] 2311010.                                    Gvr2010 
20286+5039 HJ 1524     HJL 281.                                                                HJL1986 
20286+0351 HJ 2967     BAL 2534.                                                                       
20288+3810 ES  206     SEI1131.                                                                Nsn2017d
20289-0652 HJ  918     J  1391. HDO 158.                                                               
20289-1749 SHJ 323     rho Cap = 11 Cap.                                                               
                       Dob1927 DE measure earlier also erroneously attributed to BC.                   
                       AB: H 2  51.  AD: H 6  29.                                              MEv2010 
                       AB: Quadrant determined in 1994.5246 by speckle imaging analysis.       Hor1996 
                       AD: H 6  29 = SHJ 322. AB: SHJ 323 = H 2  51.                           Dam2011 
20290+0710 A   610     Malkov et al. (2012) derive dynamical, photometric, and spectroscopic           
                       masses of 1.72 +/- 1.14, 2.01, and 1.05 Msun, respectively.             Mlk2012 
20291+1622 BPM2172     [PM2000] 2313773 + [PM2000] 2313902.                                    Gvr2010 
20291+0325 HJ 2968     BAL 2535.                                                                       
20292+1735 BPMA249     [PM2000] 2314520 + [PM2000] 2315236.                                    Gvr2010 
20293+3731 WEI  35     AB: SEI1133.                                                            Nsn2017d
                       CD: SEI1135.                                                            Nsn2017d
20293+2700 DOO  93     AC: 9s p and 3' n of BD+26 3912. Many other faint stars. One was                
                       measured 6s p, which may be the HJ pair.                                Doo1915a
20293+1155 BPM2173     [PM2000] 2314838 + [PM2000] 2314955.                                    Gvr2010 
20294+4011 ALV   6     RAFGL 2591. Massive YSO associated with optical/near-IR nebula.         Alv2004 
20294+3447 GCB  53     ADP   7. ADP measures corrected from 27deg to 360-27=333deg.                    
20294+1617 BPM2174     [PM2000] 2315826 + [PM2000] 2315584.                                    Gvr2010 
20294+0330 HJ 2970     BAL 2536.                                                                       
20295+8105 STT 593     AB: 74 Dra. LDS1932. A spectroscopic binary. B is BD+80@662.                    
                       AB: HJL 283.                                                            HJL1986 
                       AB: SHY 777. Bayesian analysis by Shaya & Olling (2011) indicates very  Shy2011 
                       high (near 100%) probability pair is physical.                                  
20295+5604 KUI  97     B probably variable, according to Couteau. Not see by me 1940, 1941,            
                       1942, nor by Muller in 1953 with the 36inch at Lick, or by Couteau in           
                       1957 at Nice.                                                           Baz1972 
20295+1512 BPM2175     [PM2000] 2316202 + [PM2000] 2316059.                                    Gvr2010 
20296+6300 the Cep     Hipparcos astrometric solution adopted some elements from the orbit of  HIP1997d
                       Abt (1961).                                                             AbH1961 
20296-0650 DOO  85     J  1393.                                                                        
20296-4609 I  1422     Measures uncertain, too close. Needs speckle.                                   
20297+3808 STF2691     SEI1138.                                                                Nsn2017d
20297-2719 COO 240     WHC  20.                                                                        
20298+1154 J  1243     Not found in this position by Heintz.                                   Hei1987a
20298+0941 AST   2     AB: GJ 791.2 = HU Del. HST Fine Guidance Sensor data were used by               
                       Benedict et al. (2000) to derive perturbation orbital parameters,       AST2000 
                       distance, component masses, and absolute magnitudes for this nearby             
                       low-mass binary. Published measures are of the primary relative to the          
                       barycenter. The authors calculate a true semi-major axis of 108.8               
                       +/- 0.7 mas, while Harrington (1971) calculates a value of 0".10.       Hrr1971 
                       Harrington determined a delta-m in excess of 3, in agreement with the           
                       HST measures.                                                                   
                       See Baize & Petit (1989) catalog of doubles with variable component.    Baz1989d
                       As the measures relative to the barycenter were cataloged as measures   AST2000 
                       of AB, the first measure of AB was cataloged as JNN 282. The pair is    Jnn2014 
                       a simple binary. Identity first suggested by Knapp.                     Kpp2019n
                       Estimated age 30-300 Myr; masses 0.19+/-0.08 and 0.05+/-0.03 Msun       Jnn2014 
                       a ~1.4au.                                                                       
20299+4022 HJ 1525     There is no star in the vicinity at all corresponding to O. Stone 50.   Doo1915a
                       AB: SEI1139.                                                            Nsn2017d
20299+2624 S   750     B is BD+25@4260.                                                                
20299-1835 SHJ 324     12 Cap = omi Cap. B is BD-19@5830.                                              
                       H 4  71.                                                                MEv2010 
20300+0023 JNN 283     Estimated age 1000-10000 Myr; masses 0.28 +/- 0.07 and 0.16 +/- 0.03            
                       Msun; a ~6.7 au.                                                        Jnn2014 
20301+4857 BU  669     ome 1 Cyg = 45 Cyg = V2014 Cyg                                                  
20301+4007 ES  245     SEI1140.                                                                Nsn2017d
20301+1103 BPM2176     [PM2000] 2319298 + [PM2000] 2318980.                                    Gvr2010 
20301+0730 LDS4846     Aka GWP2962.                                                            Dam2016d
20302+2651 BUP 213     AE: Distance 1324.4".                                                           
20302+1925 S   752     C: Bidelman says a 1958 plate "shows very strong reversal at H-alpha".          
20303+1054 BU   63     1 Del.                                                                          
20306+4419 HD 195592   The star is close to and probably associated with WR 140.               Msn1998a
20306+2158 BRT2478     J 2597.                                                                         
20307+4137 CAN   1     [MT91] 5. Primary is an O6 star in the Cygnus OB2 Association.                  
                       Caballero-Nieves et al. (2014) find some suggestion that the primary            
                       may itself have a close companion.                                      CaN2014 
20307+3521 HJ 1526     A,BC: SEI1143.                                                          Nsn2017d
20307+1718 BPM2178     [PM2000] 2322413 + [PM2000] 2321986.                                    Gvr2010 
20307+1233 BPM2177     [PM2000] 2322349 + [PM2000] 2322075.                                    Gvr2010 
20308+1347 STF2688     Same as STF2689.                                                                
20308+1059 BPM2179     [PM2000] 2322753 + [PM2000] 2322972.                                    Gvr2010 
20309+4913 S   755     AB: H 4  23.                                                            MEv2010 
                       B is BD+48@3146.                                                                
20309+1126 LAU   4     BRT1344. Barton derived his measurement from a Toulouse plate observed  Brt1935a
                       as part of the Astrographic Catalogue project.  However, his secondary          
                       was apparently either a plate flaw measured as a star, a reduction              
                       error, or a typographical error in the preparation of the catalogue.            
                       Thanks to John Nanson (2014, private comm.) for alerting us to this             
                       missing measurement.                                                            
20309+0626 DAE  10     WSP   2.                                                                        
20310+3656 AC   18     44 Cyg.                                                                         
20310+2054 GCB  55     J 3090 is identical                                                     Hei1983a
                       Also appears to be the same as GCB  56 with a typo in that separation.  Dam2013 
20310+1402 BPM2180     [PM2000] 2323697 + [PM2000] 2323379.                                    Gvr2010 
20311+5814 LDS1474     LDS4849.                                                                        
20311+3935 LDS6414     NLTT 49394/49393                                                        Chm2004 
20311+3847 SEI1150     LDS1043.                                                                        
20311+3333 COU1962     More speckle obs needed to cover the orbit.                                     
                       Malkov et al. (2012) derive dynamical, photometric, and spectroscopic           
                       masses of 1.03 +/- 0.31, 1.82, and 0.85 Msun, respectively.             Mlk2012 
20311+1600 BPM2181     [PM2000] 2324585 + [PM2000] 2325030.                                    Gvr2010 
20311+1548 A  1675     A measure on 1980.7257, incorrectly attributed to ADS 13944 by                  
                       McAlister et al. (1983), actually  belongs to ADS 14761.                McA1983 
                       1980.4771: Theta was incorrectly given as 313.7 degrees                 McA1983 
                       1980.7257: This measure was incorrectly attributed to HR 8059           McA1983 
                       1986.578: Separation for this partially resolved pair was calculated            
                       under the assumption of zero or otherwise known magnitude difference.   Tok1985 
                       Malkov et al. (2012) derive dynamical, photometric, and spectroscopic           
                       masses of 5.97 +/- 2.33, 4.29, and 2.09 Msun, respectively.             Mlk2012 
20312+5653 RAO  22     Acceleration binary (Makarov & Kaplan 2005) first resolved by Riddle    Mkr2005 
                       et al. (2015). The position angle in this paper measured on 2013.8367   RAO2015 
                       differs by 27° from the 2012.7592 measurement. That is not the only     .      
                       discrepancy between the two data sets. The photometry with P3K shows            
                       large magnitude differences (dJ = 2.5 and dK = 2.3), while Robo-AO              
                       detected a binary of equal brightness. The separation between the two           
                       components is fairly small and in the P3K data, the companion lies on           
                       the Airy ring of the primary, which could increase the errors. The              
                       primary is a high PM star, the pair AB is most likely a physical                
                       binary. Additional observations are needed to understand this system.   Rbr2015d
20312+1116 STF2690     A,BC: H 3  16.                                                          MEv2010 
           DA    1     BC: STT 407.                                                                    
                       BC: Malkov et al. (2012) derive dynamical and photometric masses of             
                       0.20 +/- 0.38 and 2.46 Msun, respectively.                              Mlk2012 
20312+0513 AG  257     Primary is eclipsing binary MR Del (period 0.52169 day).                Zas2010 
20313+4913 S   756     ome 2 Cyg = 46 Cyg                                                              
20314+3833 JNN 284     LHS 3559. Estimated age 1000-10000 Myr; masses 0.21 +/- 0.04 and 0.13           
                       +/- 0.02 Msun; a ~1.8 au.                                               Jnn2014 
20314+2421 POU4563     J  3315.                                                                        
20314+2054 J   844     Heintz says GCB 54 and J 844 are identical, with erroneous position     Hei1983a
                       and angle by Jonckheere. Designation J 844 retained, based on earlier           
                       discovery.                                                                      
                       Same as GCB  57.                                                        Dam2013 
20317+3831 ES  246     AB: SEI1153.                                                            Nsn2017d
                       AC: SEI1154.                                                            Nsn2017d
20315+3347 LAF  62     Due to the large number of components (exceeding the number of upper-           
                       case letters), a non-standard component designation was necessary,              
                       hence the pairings A,Za; A,Zb; etc. For this pair, as well as LAF  59           
                       and LAF  71, the lower-case designations (such as Za and Zb) do not             
                       refer to components of a close pair.                                            
20317+2055 J  3222     Same as GCB  58.                                                        Dam2013 
20317+1124 BPM2182     [PM2000] 2327286 + [PM2000] 2326847.                                    Gvr2010 
20319+1758 BPM2183     [PM2000] 2328243 + [PM2000] 2328848.                                    Gvr2010 
20319-4054 I  1627     AC: Optical pair, based on study of relative motion of the components           
                       using the method of apparent motion parameters.                         Kiy2008 
                       AC: Rectilinear solution by Hurowitz et al. (2014).                     USN2014b
20319+3920 HJ 1531     SEI1155.                                                                Nsn2017d
20320+2548 STF2695     Absolute quadrant determined in 1998.657 and 1998.660 by                        
                       triple-correlation techniques.                                          Pru2002b
                       Malkov et al. (2012) derive dynamical and photometric masses of                 
                       4.21 +/- 1.25 and 3.12 Msun, respectively.                              Mlk2012 
20321+2051 GCB  57     Same as J  3222?                                                                
20322+1754 GWP2966     Incorrectly added as 20322+1759 due to typo in coordinates.                     
20322-2209 HJ 2973     B is BD-22@5458.                                                                
20322-4521 RST5470     The close pair may be in rapid motion.                                          
20324+4118 HER   3     Measures disagree.                                                              
                       Includes V729 Cyg, a Beta Lyr type eclipsing binary, P = 6.59787d.      Zas2012 
                       Schulte 5 = V729 Cyg was first resolved by Herbig (1967). The primary   Her1967 
                       is a short-period eclipsing binary, consisting of two luminous evolved          
                       stars.                                                                  CaN2014 
20324-0951 BU  668     CHARA Array Limb-darkened diameter of A :                               CIA2013c
                       R =  1.8673 +/- 0.0833 \rsun, L =   2.7046 +/-0.0466 \lsun,                     
                       Teff = 5421 +/- 118 K, M = 1.097 \msun, Age = 8.2 Gyr.                          
20325-1637 SEE 512     Docobo et al. (2010) derive a dynamic parallax of 10.54 +/- 0.30 mas    Doc2010h
                       and a total mass of 3.08 +/- 0.29 Msun.                                         
                       Malkov et al. (2012) derive dynamical, photometric, and spectroscopic           
                       masses of 3.93 +/- 0.91, 2.54, and 3.69 Msun, respectively.             Mlk2012 
20325-2142 SEE 420     CD-22@14788. A is the Mira-type system RU Cap.                                  
20327+4114 CAN   5     Primary is [MT91] 304 = VI Cyg 12, an early B-type hypergiant in the            
                       Cygnus OB2 Association. Ambiguity in the position of the secondary              
                       along one FGS coordinate leads to two possible position angles for the          
                       measure.                                                                CaN2014 
20327+2903 ARY  27     BC and BD: Originally 20328+2903 ARY  27AB and AC, but primary found            
                       to be B component of 20327+2903 ARY  47.                                        
20327+1932 OSO 126     G144-009. None is a common proper motion pair, based on comparison              
                       with POSS2 red plates.                                                  Oso2004 
20327+1151 BPM2184     [PM2000] 2332308 + [PM2000] 2331994.                                    Gvr2010 
20327-8155 HJ 5175     AB and AC: Additional notes may be found in van den Bos (1956).         B__1956a
20328+3954 ES 1680     BC: 20327+3995ES 1977.                                                          
20329+4154 BLA   8     Hipparcos astrometric solution adopted some elements from the orbit of  HIP1997d
                       Duquennoy & Mayor (1991).                                               Duq1991 
                       Combined spectroscopic/interferometric orbit by Torres et al. (2002),   Trr2002 
                       including visibility data from the Palomar Testbed Interferometer.              
                       Additional elements for this metal-poor binary are:                             
                          gamma    = -5.841          0.037   km/sec                                    
                          KA       = 28.926          0.046   km/sec                                    
                          KB       = 36.72           0.21    km/sec                                    
                          dm       = 1.056           0.013   mag (K band)                              
                                     1.154           0.065   mag (H band)                              
                          parallax = 46.08           0.27    mas                                       
                          masses   = 0.844           0.018   Msun                                      
                                     0.6650          0.0079  Msun                                      
                       Orbit determined by fitting revised Hipparcos intermediate astrometric          
                       data. Derived component masses 0.84 +/- 0.05 and 0.67 +/- 0.04 Msun.    Ren2010 
                       Improved resolved SB2 orbit for this pair.                              Kie2018 
                       A: Teff = 5296 +/- 19 K, M = 0.8420 +/- 0.0014 \msun.                           
                       B: Teff = 4360 +/- 87 K, M = 0.66201 +/- 0.00076 \msun.                         
                       Orbital parallax = 46.131 +/- 0.084 mas.                                        
                       Malkov et al. (2012) derive dynamical, photometric, and spectroscopic           
                       masses of 1.58 +/- 0.05, 1.73, and 0.88 Msun, respectively.             Mlk2012 
20329+1357 BU  670     AB: Additional notes may be found in Voute (1951).                      Vou1951 
           L    35     CD: Malkov et al. (2012) derive dynamical, photometric, and                     
                       spectroscopic masses 2.20 +/- 1.00, 1.66, and 0.85 Msun, respectively.  Mlk2012 
20332+4122 CAN   6     Primary is [MT91] 429 = V2186 Cyg, a short-period eclipsing binary in           
                       the Cygnus OB2 Association.                                             Can2014 
20332+4028 HJ  609     B is BD+39 4236.                                                                
20332+1659 BPM2185     [PM2000] 2334751 + [PM2000] 2335156.                                    Gvr2010 
20333+3323 HJ 1535     AB: A is SB1 (CfA: P=1342d = 3.67y) and astrometric binary (Goldin &    Gln2007 
                       Makarov 2007, P=1437d)                                                  Tok2014d
                       AC and AD: Optical pairs, based on study of relative motion of the              
                       components using the method of apparent motion parameters.              Kiy2008 
                       A new 2+2 quadruple system. The outer 17" binary HJ 1535 AB has been   .        
                       known since 1828 (Herschel 1831). If B were a background star, the PM  HJ_1831  
                       of A, 0".208/y, would have moved it by 38" in 185 yr. The pair AB is   .        
                       therefore undoubtedly physical. The discrepant PM of B reported in     .        
                       the WDS could be caused by the subsystem Ba,Bb discovered here. The A  .        
                       component has an astrometric subsystem Aa,Ab with P = 3.9 yr (Goldin   .        
                       & Makarov 2007), confirmed spectroscopically by D. Latham. The B       Gln2007  
                       component was tentatively resolved by Robo-AO, but was thought to be   .        
                       too uncertain to publish in Riddle et al. (2015). Now Ba,Bb is         RAO2015  
                       clearly resolved at 0".17. Its estimated period is ~30 yr. The field   .        
                       is extremely crowded and another faint star E is detected at 12".1     .        
                       from A by both Robo-AO and PALM-3000. Comparison with 2MASS shows      .        
                       relative motion opposite to PM(A), so AE is optical.                   Rbr2015d 
           RBR  30     Ba,Bb: incorrectly labelled RBR 29 in Table 1 of Roberts et al.        Rbr2015d 
           HJ 1535     AC: Rectilinear solution by Hurowitz et al. (2014).                     USN2014b
20333-8058 HJ 5182     B is CPD-81@900.                                                                
20334+1544 BPM2186     [PM2000] 2336060 + [PM2000] 2336338.                                    Gvr2010 
20335-1333 OCC1089     OCC9193.                                                                        
20337+4123 CAN   8     Primary is a double-lined SB in the Cygnus OB2 Association.             CaN2014 
20337+2322 JNN 285     G 186-29. Estimated age 1000-10000 Myr; masses 0.46 +/- 0.13 and 0.28           
                       +/- 0.09 Msun; a ~20.1 au.                                              Jnn2014 
20337+1222 BPM2187     [PM2000] 2337288 + [PM2000] 2336741.                                    Gvr2010 
20338+3336 HJ 1538     SEI1167.                                                                Nsn2017d
20338+1704 BPM2188     [PM2000] 2337689 + [PM2000] 2337140.                                    Gvr2010 
20339+4642 BU 1489     B is +46@2978.                                                                  
20339+3515 WRH  34     AB: 47 Cyg.                                                                     
                       Absolute quadrant determined in 1998.657 by triple-correlation                  
                       techniques                                                              Pru2002b
                       NPOI Limb-darkened diameter 4.472 +/- 0.017 mas, Sp = K4I,              NOI2018 
                       Teff = 3671 +/-304 K,                         M = 4.49 +/- 0.66 \msun,          
                       Age = 0.15 +/- 0.06 Gyr.                                                        
20339+1032 BPM2189     [PM2000] 2338021 + [PM2000] 2337651.                                    Gvr2010 
20339-2710 CBL 178     A 355d spectroscopic solution for the A component has been found        Tok2019g
                       making this a triple system.                                                    
20340+4118 CAN  10     [MT91] 696. Primary is an O9.5 eclipsing, double-lined SB in the                
                       Cygnus OB2 Association. Ambiguity in the position of the secondary              
                       along one FGS coordinate leads to two possible position angles for the          
                       measure.                                                                CaN2014 
20340+1659 BPM2190     [PM2000] 2338597 + [PM2000] 2338116.                                    Gvr2010 
20340+0433 A  2282     Not seen for certain since 1946.                                                
20341+2814 L    48     AB: BRT  49                                                                     
20342-0045 BAL 613     J 1708.                                                                         
20342-2024 BHA  40     CPD-20@7956.                                                                    
20345+3759 BKO 569     Anon. 82.                                                               Bko2009d
20345+1735 BPM2191     [PM2000] 2341006 + [PM2000] 2340720.                                    Gvr2010 
20345+1036 BPM2192     [PM2000] 2341239 + [PM2000] 2341085.                                    Gvr2010 
20346+3334 GRV 356     AC: Also known as GRV 355AB.                                                    
20346+2914 J   565     Pair observed in 1947 is indeed the same BD+28 3797 observed in 1911.           
                       Pair is +3s, -5' from BD+28 3796.                                       J__1948 
20346+1423 BPM2194     [PM2000] 2341642 + [PM2000] 2342038.                                    Gvr2010 
20346+1255 BPM2193     [PM2000] 2341441 + [PM2000] 2340925.                                    Gvr2010 
20346-2219 LDS4850     NLTT 49474/49477                                                        Chm2004 
20347+3230 STF2700     Spectrum of B: F2IV-V.                                                          
20348+1644 BPM2195     AB: [PM2000] 2342658 + [PM2000] 2342333.                                Gvr2010 
           BPM2196     BC: [PM2000] 2342333 + [PM2000] 2342607.                                Gvr2010 
20349+4651 STTA208     B is BD+46@2982.                                                                
                       Pair appears in an appendix list, not part of discoverer's regular              
                       numbering sequence.                                                             
20350+3757 BKO 570     Anon. 83.                                                               Bko2009d
20350+3419 J   791     AC: SEI1175.                                                            Nsn2017d
20350+3323 HJ 1543     SEI1174.                                                                Nsn2017d
20350+2754 FOX  95     BRT 50.                                                                         
20351+5624 HJ 1551     Burnham switched his observations of this 40" pair and the nearby 20"           
                       pair 20352+5622 HJ 1552. His coordinates agree with the relative                
                       locations of these two pairs, however.                                  Bu_1906 
20351+1439 BPM2197     AB: [PM2000] 2343723 + [PM2000] 2343678.                                Gvr2010 
           BPM2198     BC: [PM2000] 2343678 + [PM2000] 2343784.                                Gvr2010 
20351-6042 RST4670     CD-61@6424.                                                                     
20352+5622 HJ 1552     Burnham switched his observations of this 20" pair and the nearby 40"           
                       pair 20351+5624 HJ 1551. His coordinates agree with the relative                
                       locations of these two pairs, however.                                  Bu_1906 
20352+1803 BPM2200     [PM2000] 2344368 + [PM2000] 2344014.                                    Gvr2010 
20352+1659 BPM2199     [PM2000] 2344120 + [PM2000] 2343961.                                    Gvr2010 
20352+0608 HWE  98     Optical pair, based on study of relative motion of the components               
                       using the method of apparent motion parameters.                         Kiy2008 
20353+1440 DRS  32     Zet Del. De Rosa et al (2014) derive a system age of 525 +/- 125 Myr.           
                       The B component is estimated as L5 +/- 2, with mass 55 +/- 10 Mjup.     DRs2014b
20354+6454 GIC 165     B is a double-lined spectroscopic binary.                                       
                       AG = G262-021/G262-022. None of the OSO components are proper motion            
                       companions                                                              Oso2004 
20356+1315 BPM2201     [PM2000] 2345880 + [PM2000] 2345942.                                    Gvr2010 
20357+3901 SEI1185     Neither component seen on POSS plate; may be flaws on AC Potsdam plate          
20357+2741 BRT3359     Originally published as BRT 214.                                        Brt1928 
20359+3615 GII  52     Gili (2016) associates this triple with 20359+3617 TDT2405, but the             
                       systems differ in position by 1.7'. GII  52Aa,Ab = GII  69 = GII  98.   Gii2016 
20361+3852 SEI1189     Duplicity not apparent on POSS plate; one component may be either               
                       variable star or flaw on AC Potsdam plate.                                      
20362+1311 BPM2202     [PM2000] 2348831 + [PM2000] 2349269.                                    Gvr2010 
20363+1328 BPM2203     AB: [PM2000] 2348914 + [PM2000] 2348707.                                Gvr2010 
           BPM2204     AC: [PM2000] 2348914 + [PM2000] 2348886.                                Gvr2010 
20364+1651 BPM2205     [PM2000] 2349398 + [PM2000] 2349432.                                    Gvr2010 
20364+1339 BPM2206     [PM2000] 2349548 + [PM2000] 2349717.                                    Gvr2010 
20365-0311 TOR  26     Formerly known as PAN  23.                                                      
20366+6226 H 4  78     H IV 78. Same as STF2712.                                                       
20366+3825 HJ 1548     SEI1191.                                                                Nsn2017d
20366+1553 BPM2207     [PM2000] 2350503 + [PM2000] 2350667.                                    Gvr2010 
20366+0123 HJ 5513     Herschel coordinates 20 27 NPD 89 12 (1830). He notes: "Curiously       HJ_1870 
                       quadruple; four small stars alternately 15m and 18m, and very close;            
                       in a line very nearly coincident with the parallel."                            
20366-7104 DUN 231     B is CPD-71@2562.                                                               
20368+3157 J   568     BRT 282.                                                                Brt1929b
20368+1444 STF2703     AB: H 4  92.                                                            MEv2010 
20369+2538 BRT3360     Originally published as BRT 215.                                        Brt1928 
20369-1244 STF2699     BDS 10334, H N 134 and BDS 10348, WEI  36 same as this star.                    
20370+0452 SMA 118     BAL 2969.                                                                       
20371+6122 SHY 780     HIP 101719 + HIP 102727.                                                        
20371+1738 BPM2208     [PM2000] 2352538 + [PM2000] 2352821.                                    Gvr2010 
20372+1224 BPM2209     [PM2000] 2352819 + [PM2000] 2352639.                                    Gvr2010 
20372+1143 BPM2210     [PM2000] 2353126 + [PM2000] 2352937.                                    Gvr2010 
20372+0135 J  2574     BAL 1565.                                                                       
20372-4445 TOK 369     First resolution; estimated period 70yr, constant RV. This binary was           
                       not resolved by speckle interferometry, possible because the companion          
                       is too faint in the visible. It is an X-ray source and a "PMS" star             
                       according to SIMBAD.                                                    Tok2013b
20373+2157 MCT  11     Initially catalogued in error as 20273+2157.                                    
20374+7536 HEI   7     The primary is the class W eclipsing SB VW Cep, P = 0.278 d. The                
                       light amplitude is 0.5 mag. and the light curve is variable.                    
                       The Hershey (1975) orbit is astrometric; only the value of the          Hry1975 
                       semi-major axis was computed after the companion was resolved. The              
                       ascending node is tentatively identified from what appears to be a              
                       lighttime effect superimposed on intrinsic period changes in the                
                       eclipsing pair.                                                                 
                       See Baize & Petit (1989) catalog of doubles with variable component.    Baz1989d
                       BD+74@889, (mag. 7.9, G5) one degree distant, shares common proper              
                       motion and radial velocity.                                                     
                       Pribulla & Rucinski (2006) estimate the mass of the contact pair at     Pbl2006 
                       1.781 Msun and the minimum mass of the wider component at 0.42 Msun.            
20374+1735 BPM2211     [PM2000] 2353944 + [PM2000] 2353484.                                    Gvr2010 
20374+1626 BPM2212     [PM2000] 2354073 + [PM2000] 2353760.                                    Gvr2010 
20374-0254 TOR  27     Formerly known as PAN  24.                                                      
20374-4202 CPO  89     LDS 716.                                                                        
20375+3134 STFA 53     B is BD+31@4160.                                                                
20375+1557 BPM2214     [PM2000] 2354200 + [PM2000] 2354541.                                    Gvr2010 
20375+1436 BU  151     bet Del = 6 Del = Rotanev.                                              Mlr1955c
                       1975.545, 1975.956: The elements quoted by Finsen (1938) and            Fin1938a
                       Couteau (1962) each give theta and rho greater than those               Cou1962e
                       observed.                                                               BLM1978 
                       Primary is a giant, according to isochrone fit.                         Sod1999 
                       Two AO photometric analyses by ten Brummelaar et al. both include       TtB1996b
                       mass determination and spectral typing.                                 TtB2000 
           HJ 5545     AB,C: Optical pair, based on study of relative motion of the                    
                       components using the method of apparent motion parameters.              Kiy2008 
           STF2704     AB,D: Optical pair, based on study of relative motion of the                    
                       components using the method of apparent motion parameters.              Kiy2008 
                       AB,D: H 4  35.                                                          MEv2010 
           HJ 5545     AB,C: Rectilinear solution by Hurowitz et al. (2014).                   USN2014b
           STF2704     AB,D: Rectilinear solution by Friedman et al. (2012).                   USN2012a
20375+1130 BPM2213     [PM2000] 2354156 + [PM2000] 2353691.                                    Gvr2010 
20375-0303 J  1775     Barton listed at this position, from the San Fernando astrographic              
                       catalog, a triple star which does not resemble the one observed.        J__1941d
20376-4717 HJ 5209     alp Ind. Spectrum K0IIICNIII-IV.                                                
                       AB: Optical pair, based on study of relative motion of the components           
                       using the method of apparent motion parameters.                         Kiy2008 
20377+3322 STF2705     Spectrum: K0IIb/IIIBa0.2.                                                       
20377+1736 BPM2215     [PM2000] 2355077 + [PM2000] 2355402.                                    Gvr2010 
20377+0152 J  3255     Aka J  1776.                                                            Dam2016d
20378+3224 ARY  48     HJL 284.                                                                HJL1986 
20379+5144 OSO 128     G230-044. Neither is a common proper motion pair, based on comparison           
                       with POSS2 red plates.                                                  Oso2004 
20379+2522 POU4757     A is a Beta Lyrae-type system..                                                 
20379-6038 MUG   4     AB are CPM. Followup spectroscopy confirmed the B component is                  
                       a dwarf; estimated mass is 0.363 +- 0.018 Msun.                         Mug2005 
                       AB pair bound. Primary is G3, and is planet host star.                  Egn2007 
                       AB: A is exoplanet host, P=1316d                                        Tok2014d
           EGN  25     Ba,Bb pair bound; spectral types estimated as M1.5-M4.5 and M2.5-M5.5           
                       dwarfs, masses 0.29 +/- 0.02 and 0.19 +/- 0.02 Msun.                    Egn2007 
20380+3806 SEI1197     Neither component seen on POSS plate; may be flaws on AC Potsdam plate          
20381+3601 HJ 1553     SEI1200.                                                                Nsn2017d
20383+4804 ES   89     H 4  24.                                                                MEv2010 
20383+3814 SEI1202     Primary not seen on POSS plate; may be either variable star or flaw on          
                       AC Potsdam plate.                                                               
20383+1623 BPM2216     [PM2000] 2357756 + [PM2000] 2357789.                                    Gvr2010 
20383-0106 BU  672     71 Aql. A is a long-period spectroscopic binary.                                
20384-2100 RST9008     Previously known as RST5551a.                                                   
                       Measures uncertain, needs speckle.                                              
20386+1000 BRT2187     J 3100.                                                                         
20387+3838 STF2708     AB and AC: Optical pairs, based on study of relative motion of the              
                       components using the method of apparent motion parameters.              Kiy2008 
                       AB: H N  87.                                                            MEv2010 
20388+0202 HJ  920     BAL 1566.                                                                       
20390+1400 BPM2217     [PM2000] 2360815 + [PM2000] 2360528.                                    Gvr2010 
20391+3103 J  1238     BRT 284.                                                                Brt1929b
20391+1550 BU  288     AE: Kuiper (1961) lists the measure as AC, but notes "This is, of               
                       course, not the companion C measured by Burnham as given in the ADS,            
                       but, like D, a fainter and closer companion not previously seen.        Kui1961b
20391+1526 BPM2219     [PM2000] 2361308 + [PM2000] 2361380.                                    Gvr2010 
20391+1243 BPM2218     [PM2000] 2361255 + [PM2000] 2360960.                                    Gvr2010 
20391+1005 STT 533     kap Del = 7 Del. AC = LDS1044.                                                  
                       AB: Optical pair, based on study of relative motion of the components           
                       using the method of apparent motion parameters.                         Kiy2008 
                       AC: SHY 334. Bayesian analysis by Shaya & Olling (2011) indicates very  Shy2011 
                       high (near 100%) probability pair is physical.                                  
           kap Del     Gontcharov & Kiyaeva (2010 detect variation in Hipparcos data which             
                       they conclude is due to an unseen companion, orbiting the primary with          
                       a period of 45 +/- 5 years. The companion is >4 mag fainter than the            
                       primary; spectral type estimated as WD or RD, mass 0.4 +/- 0.3 Msun.    Gon2010 
20392-0609 RAS  31     Silicon star, type A0; companion close to F0.                           Ras2014 
20393-1457 HU  200     tau 2 Cap = 14 Cap.                                                             
20394+0029 HJ 2984     1 Aqr.                                                                          
20395+1812 BPM2220     [PM2000] 2362752 + [PM2000] 2362234.                                    Gvr2010 
20396+2018 WFC 257     HJL 285.                                                                HJL1986 
20396+1555 WCK   2     Aa,Ab: alp Del = 9 Del = Sualocin. Spectroscopic binary now resolved by         
                       interferometry.                                                                 
                       Uniform disk diameter  0.407 +/- 0.022 mas,                                     
                       Limb darkened diameter 0.420 +/- 0.022 mas,                                     
                       Teff = 13300 +/- 1300 K based on LDD.                                           
                       Radius is 3.02 +/- 0.19 \rsun.                                          CIA2019a
                       Aa,Ab: Malkov et al. (2012) derive dynamical, photometric, and                  
                       spectroscopic masses 6.43 +/- 3.52, 4.55, and 2.82 Msun, respectively.  Mlk2012 
20396+1120 BPM2221     [PM2000] 2363164 + [PM2000] 2362824.                                    Gvr2010 
20396+0458 KUI  99     For initial attempt I recorded 1950,497, 44.2deg, 0.31, dm 1.0 for a            
                       star 2 arcmin south of this pair. Such star was not found on later              
                       occasions when, however, the seeing was less satisfactory.              WRH1951 
           BAG  14     Visual primary is 920d SB2 (#1253 in Batten et al. 1989). There is      Bte1989 
                       some spectroscopic evidence for a third star.                                   
                       Malogolovets et al. (2007) derive spectral types for Aa, Ab, and B of   Mlg2007 
                       K5, K9, and K8, respectively. Mass of Aa+Ab is 1.28 +/- 0.15 Msun,              
                       entire triple has mass 1.69 +/- 0.27 Msun. The system is weakly                 
                       hierarchical.                                                                   
20399+1115 ENG  75     AB: Components share CPM. Spectral type of B component M1V +/- 1.       Cvn2007 
                       CHARA Array Limb-darkened diameter  0.494 +/- 0.046 mas,                CIA2008c
                       R =  1.79  +/- 0.17  \rsun.                                                     
           CVN  17     Aa,Ab: Companion is a probable late-K dwarf.                            Cvn2006 
                       Chauvin et al. (2011) make a combined astrometric/RV study of the               
                       expoplanet host binary HD 196885, and derive a mass function for the            
                       planet (M_Aa1 sin i) = 2.98 +/- 0.05 Mjup and a mass for the stellar            
                       companion M_Ab = 0.45 +/- 0.01 Msun. (Note: their paper refers to the           
                       700mas pair as AB and the planet as Ab)                                 Cvn2011 
20400+1749 BPM2222     [PM2000] 2365017 + [PM2000] 2364633.                                    Gvr2010 
20401-2411 HJ 5212     Spectrum: G6/8IIICNIV.                                                          
20402+1248 BPM2223     [PM2000] 2365687 + [PM2000] 2365276.                                    Gvr2010 
20402+1126 BPM2224     [PM2000] 2365763 + [PM2000] 2365528.                                    Gvr2010 
20403+6030 TOK 679     Estimated mass(B)=0.34. DSS2 indicates that B is physical.              Tok2014d
20403+5413 OSO 129     G230-045. None is a common proper motion pair, based on comparison              
                       with POSS2 red plates.                                                  Oso2004 
20403-4956 KRW   2     Based on a comparison of images spanning 23 years, Krawczenko (2014)            
                       determined that this pair shares common proper motion. From colors,             
                       spectral types for the primary and secondary appear to be about K0 and          
                       G8V, repectively; distances are 640 and 870 pc, masses about 0.79 and           
                       0.81 Msun.                                                              Krw2014a
20404-3251 SHY 781     HIP 102021 + HIP 101693.                                                        
20406+2948 HO  137     A is a spectroscopic binary.                                                    
20406+1559 BPM2225     [PM2000] 2367645 + [PM2000] 2367729.                                    Gvr2010 
20406+1539 HDS2947     New observations of this object indicate that the orbit is eccentric,           
                       and that we observed the system near periastron (and below the                  
                       diffraction limit of the DCT). The orbital elements obtained confirm            
                       that picture, yielding a total mass of 3.4 +/- 0.5 Msun. The composite          
                       spectral type is F5 and the system has a magnitude difference of about          
                       1, so that we might suggest that the individual spectral types are F4           
                       and F9. If so, then the total mass would be on the order of 2.5 Msun,           
                       which is about 2 sigma lower than the value implied by the current              
                       orbital elements and the parallax of 13.96 +/- 0.55 mas. However,               
                       because there is only one point near periastron at the moment, the              
                       orbital elements will of course be modified with time.                  Hor2015b
20406-2639 CHR 186     Reported by Andersen et al. (1985 AAA 59, 15) as SB2, with 13 RVs       Bvr1986 
                       measured by Beavers & Eitter (1986).                                    McA1993 
20408+1956 LDS1045     AC: NLTT 49682/49681                                                    Chm2004 
20408+1733 BPM2226     [PM2000] 2368241 + [PM2000] 2367862.                                    Gvr2010 
20410+3905 MCA  62     Also a spectroscopic binary.                                                    
20410+3218 BNU   7     Aa,Ab: 49 Cyg. B is a spectroscopic binary.                                     
           STF2716     AB: H 2  98.                                                            MEv2010 
20412+0338 BAL2543     J 1777.                                                                         
20412-1320 WSI 163     Optical/physical nature ascertained from Gaia DR2.                      FMR2019b
20413+1327 BPM2227     AB: [PM2000] 2370282 + [PM2000] 2370311.                                Gvr2010 
           BPM2228     BC: [PM2000] 2370311 + [PM2000] 2370671.                                Gvr2010 
20413+1111 BPM2229     [PM2000] 2370391 + [PM2000] 2370466.                                    Gvr2010 
20414+4517 H N  73     alp Cyg = 50 Cyg = Deneb                                                        
20414-0835 HDO 159     BD-09@5552 at 20 37.0 -09 00 has a companion 1895: 238.8@, 7.65",               
                       mags 9.3-11.6.                                                                  
20416+5730 OSO 130     G230-047. AC is not a common proper motion pair                         Oso2004 
20416+3637 SEI1218     20416+3637ALI 423                                                               
20417+1716 BPM2230     [PM2000] 2372161 + [PM2000] 2372227.                                    Gvr2010 
20417-7521 DUN 232     mu 2 Oct                                                                        
                       A is exoplanet host P=4100d                                             Tok2014d
20418+1404 J  2575     Jonckheere unable to recover                                            J__1962a
20418-1057 HIP 102130  Unresolved. SB according to both GCS and CfA.                           Tok2013b
20420+1212 BPM2231     [PM2000] 2373040 + [PM2000] 2372773.                                    Gvr2010 
20421+1341 BPM2232     [PM2000] 2373427 + [PM2000] 2373357.                                    Gvr2010 
20422+5020 BU  675     51 Cyg.                                                                         
20423+4549 STT 411     AB: Optical pair, based on study of relative motion of the components           
                       using the method of apparent motion parameters.                         Kiy2008 
20424+5611 VKI  47     Wolf 1082.                                                                      
20424+1117 OSO 131     G144-028. None is a common proper motion pair, based on comparison              
                       with POSS2 red plates.                                                  Oso2004 
20424-3031 H N 101     B is CD-30@18114.                                                               
20425+4916 ARG  39     AB: ES   92.                                                                    
20425+2310 LDS6416     NLTT 49744/49741                                                        Chm2004 
20427+2355 POU4907     AB: Original Pouteau theta value (136.1deg) appears to have been in     Pou1933 
                       error. His actual value was probably 360-136.1 = 223.9deg.                      
20427+1440 BPM2233     [PM2000] 2376049 + [PM2000] 2375997.                                    Gvr2010 
20428+1244 BPM2234     [PM2000] 2376292 + [PM2000] 2376109.                                    Gvr2010 
20429+1152 BPM2235     [PM2000] 2376640 + [PM2000] 2376989.                                    Gvr2010 
20429-1856 WOR  41     Worley (1989) measures were originally listed as confirmations of       Wor1989 
                       Kuiper's 1943 observation of 20429-1857 KUI 100AB. However, the A comp  Kui1943 
                       of KUI 100 has very high proper motion; separation and angle in 1978            
                       would be very different. We assume that Worley measured this pair near          
                       KUI 100; the separation and angle agree, but Worley's magnitude                 
                       difference estimates are rather different.                                      
20429-1857 KUI 100     See note to 20429-1856 WOR  41.                                                 
20430+1734 BPM2236     [PM2000] 2377293 + [PM2000] 2377091.                                    Gvr2010 
20431+3645 SEI1227     B is BD+36@4205.                                                                
20431+1705 BLL  51     A is the variable S Del. B is BD+16@4350.                                       
20432+5707 V379 Cep    Harmanec et al. find spectroscopic and photometric evidence to suggest  Hmn2007 
                       V379 Cep is a quadruple system comprised of two close binaries.                 
                       Components Aa+Ab orbit with a period of 99.76d and i=90deg, and have            
                       masses of 10.56 and 6.09 Msun. Components Ba+Bb orbit in 158.71d, and           
                       have a combined mass of about 11Msun. A+B orbit with an estimated               
                       period of 7878d, and assuming a distance of ~500pc may reach a                  
                       separation of roughly 50mas. Angular separations of the close pairs             
                       are each in the 1-2 mas range.                                                  
20432-2049 CHR 222     First detected as an occultation binary by Evans.                       Evn1971 
20433+5521 LLO   1     GJ 802.  Using dH and 2MASS H magnitude, plus a parallax of 64.5 +- 2           
                       mas, Lloyd et al. (2006) derive absolute H magnitudes of 8.11 +/- 0.07  Llo2006 
                       and 12.79 +/- 0.3 mag for the two components.  They also derive an              
                       orbit using this resolved measure with STEPS astrometric observations.          
                       This orbit yields dynamical masses of 0.175 +/- 0.021 and 0.064 +/-             
                       0.032 Msun for A and B, respectively.                                           
                       Ireland et al. (2008) combine spectroscopic data with aperture-masking  Llo2008 
                       observations, plus earlier astrometry by Pravdo et al. (2005; measures  Prv2005 
                       extracted from their figures) for orbital solutions of this young               
                       triple. The inner Aa,Ab pair are equal-mass stars in an orbit of                
                       period 0.795 days and an inclination in the range 74-83deg, which may           
                       indicate coplanarity with the wider orbit. The total mass of the inner          
                       pair is 0.280 +/- 0.010 Msun, that of the B component is 0.063 +/-              
                       0.005 Msun. Absolute magnitudes are determined for all components in            
                       the J-, H-, and K-bands. Data are compared with evolutionary models.            
                       GJ 802. This is a well-studied close triple system (e.g. Ireland et     Ire2008 
                       al. 2008). It consists of a spectroscopic pair with a period of only            
                       19 h, and a brown dwarf at a separation of ∼90 mas. Both are too close  .     
                       to be resolved with AstraLux, and there are no other candidates in the          
                       field of view.                                                          Jnn2014 
20433+4456 ES 2699     B is BD+44@3552.                                                                
20434+3535 ISM   5     The Cepheid X Cyg.                                                              
20435+1504 CIA  11     del Del.                                                                        
                       CHARA Array Limb-darkened diameter of A,B:                              CIA2018a
                         =   0.500 +/- 0.014,  0.507 +/- 0.014 mas,                                    
                       R =   3.43  +/- 0.11 ,  3.48  +/- 0.11 \rsun,                                   
                       L =  32.4   +/- 4.2  , 28.8   +/- 3.4  \lsun,                                   
                       M =   1.78  +/- 0.07 ,  1.62  +/- 0.07 \msun,                                   
                       Teff = 7440 +/- 210  , 7110   +/- 180 K.                                        
                       Orbital parallax = 15.72 +/- 0.22 mas.                                          
20436+4514 CBL  85     NI   41.                                                                        
20437+1635 BPM2237     [PM2000] 2379651 + [PM2000] 2380014.                                    Gvr2010 
20438+1330 BPM2238     [PM2000] 2380121 + [PM2000] 2380344.                                    Gvr2010 
20439+3119 ES  366     According to Vyssotsky & Mateer, ES 366 is probably BD+30@4155.         Vys1952 
                       Aka HDS2950.                                                            Dam2013 
                       A is also a 21d spectroscopic binary.                                   Tok2019b
20439+1113 BPM2239     [PM2000] 2380769 + [PM2000] 2381099.                                    Gvr2010 
20440+1225 HJ 1566     C component is galaxy = UGC 11620 = LEDA 65281.                         Dam2010 
20440-3147 JSP 816     Not in Michigan Vol. XI.                                                        
20442+2154 OSO 132     G144-033.  Not a common proper motion pair, based on comparison with            
                       POSS2 red plates.                                                       Oso2004 
20442+1731 BPM2241     [PM2000] 2381821 + [PM2000] 2381675.                                    Gvr2010 
20442+1209 BPM2240     [PM2000] 2381758 + [PM2000] 2381888.                                    Gvr2010 
20443+1101 BPM2242     [PM2000] 2382256 + [PM2000] 2382347.                                    Gvr2010 
20444+1500 BPM2243     [PM2000] 2382565 + [PM2000] 2382639.                                    Gvr2010 
20445+1415 BPM2244     [PM2000] 2382992 + [PM2000] 2382792.                                    Gvr2010 
20446+4041 HJ 1574     HJ 1573 and HJ 1574 are obvious on ALADIN, forming roughly 10" and 8"           
                       pairs are roughly Herschel's position angles. Burnham's observation of  Bu_1906 
                       HJ 1574 appears discrepant.                                                     
20446+4040 HJ 1573     Burnham (BDS, part II) notes that HJ 1573 and 1574 form "a double-      Bu_1906 
                       double star; a curious object".                                                 
20446+1642 BPM2246     AB: [PM2000] 2383150 + [PM2000] 2383263.                                Gvr2010 
           BPM2247     AC: [PM2000] 2383150 + [PM2000] 2383211.                                Gvr2010 
20446+1635 BPM2248     AB: [PM2000] 2383182 + [PM2000] 2383659.                                Gvr2010 
           BPM2249     AC: [PM2000] 2383182 + [PM2000] 2383425.                                Gvr2010 
           BPM2250     BC: [PM2000] 2383659 + [PM2000] 2383425.                                Gvr2010 
20446+1605 BPM2245     [PM2000] 2383050 + [PM2000] 2382885.                                    Gvr2010 
20446+1154 BPM2251     [PM2000] 2383255 + [PM2000] 2383542.                                    Gvr2010 
20447+2032 BRT2484     J  3347.                                                                Nsn2016 
20448+3022 AG  410     HJL 286.                                                                HJL1986 
20448+2500 BRT3361     Originally published as BRT 216.                                        Brt1928 
20448+1730 BPM2252     [PM2000] 2384052 + [PM2000] 2383917.                                    Gvr2010 
20448+1512 BPM2253     [PM2000] 2384091 + [PM2000] 2383815.                                    Gvr2010 
20449+1219 B  2910     Aa,Ab: Needs speckle confirmation. One component possibly variable.             
20450+1244 D    32     CD: Measures listed as new CE pair were all actually of DC.                     
20450-0140 LDS 722     NLTT 49821/49819                                                        Chm2004 
20452+1108 BPM2254     [PM2000] 2385504 + [PM2000] 2385162.                                    Gvr2010 
20452-3057 FAL  70     Upon discovery of the wide COM pair TOK 340AC by Tokovinin & Lepine,    Tok2012c
           JSP 817     the C component was found to be the primary of 20447-3102 JSP 817.              
                       The WDS designation of the JSP pair was changed to deflect its                  
                       membership in this CPM multiple.                                                
20452-3120 LDS 720     AB: Distance 4600". A is the BY Dra-type variable AU Mic, also nearby           
                       star Gliese 803. High common proper motion pair.                                
                       AB: SHY  99. Bayesian analysis by Shaya & Olling (2011) indicates very  Shy2011 
                       high (near 100%) probability pair is physical.                                  
                       BC: Due to its large distance from A, the WDS designation for BC was            
                       originally 20419-3226.  Also known as BRT1812 or HDS2953 and as nearby          
                       star Gliese 799 AB. Discovered by Barton in 1913 but later incorrectly  Brt1936a
                       called Luyten by Voute, the BC pair became known as LDS 720 despite     Vou1947a
                       having never been observed by Luyten. See also the following note for           
                       20452-3122WOR  40.                                                              
                       GJ 799. Member of the bet Pic moving group.                             Zuc2001b
                       BC: Premature orbits have been computed. A flare star, AT Mic, sharing          
                       common proper motion with -32@16135 at 34@, 77.5'.                              
                       Measure of 1927.70 made by triangulation of multiple measures.                  
                       Measure of 1928.57 made by triangulation of multiple measures.                  
                       Star A (mag 8.6, M0Ve) 1.3 deg distant; position 204509.5-312027                
                       (2000) shares the large proper motion. Star C is the flare star                 
                       AT Mic.                                                                         
                       See Baize & Petit (1989) catalog of doubles with variable component.    Baz1989d
20452-3122 WOR  40     Located ~80" south of LDS 720A, this pair has been inadvertently                
                       observed as LDS 720BC (located ~80' south of A) on numerous occasions.          
                       Preliminary orbital analysis of LDS 720BC showed discrepancy in                 
                       orbital motion beginning with Worley measure of 1978, hence the WOR             
                       designation.                                                                    
20453+6150 BU 1493     eta Cep = 3 Cep.                                                                
                       Optical pair, based on study of relative motion of the components               
                       using the method of apparent motion parameters.                         Kiy2008 
                       Rectilinear solution by Hurowitz et al. (2014).                         USN2014b
20454+5906 ES 2700     STI 2552.                                                                       
20454+5735 ENG  76     AB: A is an SB. B is BD+57@2241.                                                
                       Optical pair, based on study of relative motion of the components               
                       using the method of apparent motion parameters.                         Kiy2008 
           CIA   1     Aa,Ab: Farrington et al. (2010) present two possible orbits for this    CIA2010 
                       F8IV-V + F9IV-V pair. One is based on speckle plus K'-band CHARA Array          
                       separated fringe packet observations, the other is a combined solution          
                       including spectroscopic data.  The resulting orbital parallax is                
                       39.8+/-4.8 mas, the masses 1.071+/-0.037 and 1.047+/-0.037 Msun.                
                       The aperture and method, 8m and speckle, are set to give the                    
                       resolution capability of this technique, which is less than classical           
                       interferometric methods.                                                        
                       Aa,Ab: Orbit determined by fitting revised Hipparcos intermediate               
                       astrometric data. Derived component masses are 0.47 +/- 0.22 and                
                       0.45 +/- 0.21 Msun.                                                     Ren2010 
                       Aa,Ab: Malkov et al. (2012) derive dynamical, photometric, and                  
                       spectroscopic masses 2.72 +/- 0.16, 2.39, and 2.38 Msun, respectively.  Mlk2012 
           ENG  76     AB: Rectilinear solution by Hurowitz et al. (2014).                     USN2014b
20454+4023 OSO 133     G210-033.  None is a common proper motion pair, based on comparison             
                       with POSS2 red plates.                                                  Oso2004 
20456+3043 STF2726     52 Cyg.                                                                         
                       H 2  25.                                                                MEv2010 
20456+2553 J  1074     Precise coordinates have been corrected, following an examination of            
                       this system by Nanson & Knapp (2017).                                   Nsn2017e
20456-0853 HDO 160     J 1778.                                                                         
20457+1537 BPM2255     [PM2000] 2387348 + [PM2000] 2387644.                                    Gvr2010 
20457+1017 OSO 134     G025-001.  Not a common proper motion pair, based on comparison with            
                       POSS2 red plates.                                                       Oso2004 
20458+1405 BPM2256     [PM2000] 2387581 + [PM2000] 2387513.                                    Gvr2010 
20459+4448 ES 2701     B is BD+44@3570.                                                                
20461+4452 ES   30     A is the semiregular variable RR Cyg. BD+44@3571a.                              
20461-2516 EHR  17     Primary is psi Cap. Companion appears to be a background star.          Ehr2010 
20462+3358 CHR 100     eps Cyg = 53 Cyg = Aljanah. A spectroscopic binary.                             
                       van Maanan notes a common high-proper motion companion located 1'.3     Maa1934 
                       west and 0'.1 south of eps Cyg. The companion (photographic magnitude           
                       ~14.8) was found on two plates taken with the Mt. Wilson 60inch over            
                       an interval of 12 years.                                                        
                       1991.8987: This finally confirms the discovery observation of this              
                       component, made in 1983 (McAlister et al 1987). A number of unresolved  McA1987b
                       observations of this very close system, dating from 1979 to 1981, were          
                       published by Hartkopf & McAlister (1984).                               Hrt1984 
                       A single lined spectroscopic binary with a period of 55 yr yields an    Grf1994 
                       estimated semi-major axis of 1.05", so the companion has only escaped           
                       visual resolution only due to its faintness. MK III measures of the     MkT2003 
                       diameter and no loss of coherence rules out companions with dm < 5.7.           
                       It is possible that CHR 100 is an artifact caused by wave-front         Tok2010b
                       distortions in the dome. The star was likely observed near the zenith           
                       and the separation of the putative companion is close to the first              
                       diffraction ring, as typical for such artifacts.                                
                       Mk III Limb-darkened diameter  4.62 mas.                                MkT1991 
                       Mk III Limb-darkened diameter  4.612 +/- 0.046 mas.                     MkT2003 
           STT 594     AB: Optical pair, based on study of relative motion of the                      
                       components using the method of apparent motion parameters.              Kiy2008 
                       AB: Rectilinear solution by Friedman et al. (2012).                     USN2012a
20462+1554 STF2725     AB: H 2  66.                                                            MEv2010 
                       A premature orbit has been computed.                                            
20463+2740 BRT3362     Originally published as BRT 218.                                        Brt1928 
20463+1624 BPM2257     [PM2000] 2389395 + [PM2000] 2389229.                                    Gvr2010 
20465+2403 POU4975     Aka POU4989.                                                            Dam2016d
20465+1439 BPM2259     [PM2000] 2390103 + [PM2000] 2389732.                                    Gvr2010 
20465+1429 BPM2260     [PM2000] 2390184 + [PM2000] 2390538.                                    Gvr2010 
20465+1131 BPM2258     [PM2000] 2389941 + [PM2000] 2390160.                                    Gvr2010 
20465-2652 HJ 5220     B is CD-27@15024.                                                               
20466+5951 MLR 236     G230-049.  Not resolved in our images                                   Oso2004 
20466+4632 KUI 101     Elongation suspected by Hough in 1885.                                          
20466+1616 BPM2261     [PM2000] 2390546 + [PM2000] 2390422.                                    Gvr2010 
20466+1532 J  3110     Aka OL  219.                                                            Dam2013 
20467+2044 HJ 2999     Erroneously designated as HJ 2899 in BDS.                               Bu_1906 
20467+1607 STF2727     gam Del. A premature orbit has been computed. 1865.74 observation of    Tal1868 
                       Talmadge lists 16.537 in the Table for the separation but 11.536 in             
                       the notes. The 11.536 value is included.                                        
                       NLTT 49870/49868                                                        Chm2004 
                       H 3  10.                                                                MEv2010 
                       Toyota et al. (2009) monitored the RV of both the A and B components            
                       every 1-2 months between 2003 Mar - 2007 Nov, using a high-dispersion           
                       echelle (precision ~10 m/s).   Standard deviations of the RVs of both           
                       components are <40 m/s and velocities show no periodic variation.               
                       These results rejects the association of a planet of mass > 1.8 Mjup            
                       with either star.                                                       Toy2009 
           FYM  18     The purported AC pair was in error and has been deleted.                FyM2014b
20467+1523 BPM2263     [PM2000] 2390967 + [PM2000] 2390725.                                    Gvr2010 
20467+1343 BPM2262     [PM2000] 2390840 + [PM2000] 2390664.                                    Gvr2010 
20468+1602 BPM2264     [PM2000] 2391076 + [PM2000] 2390777.                                    Gvr2010 
20468+0733 GAA   8     NN Del.                                                                         
                       Ma,Mb = 1.4445 +/- 0.0029, 1.3266 +/- 0.0021 \msun,                     GaA2019 
                       orbital parallax =  5.953 +/- 0.023 mas.                                        
20469+3252 ARG  93     B is BD+32@3936a.                                                               
20471+1257 BPM2265     [PM2000] 2392193 + [PM2000] 2392270.                                    Gvr2010 
20472+3422 BU  677     A is the irregular variable T Cyg.                                              
20473-0408 LDS4858     NLTT 49881/49880                                                        Chm2004 
20474+3629 MCA  63     Aa,Ab: lam Cyg = 54 Cyg. A is a spectroscopic binary, which has now             
                       been resolved by interferometry into a close and rapidly moving pair.           
                       1986.567: The separation of this partially resolved pair was                    
                       calculated under the assumption of zero or otherwise known magnitude            
                       difference.                                                             Tok1985 
           STT 413     Only elements P and T have been amended by Starikova (1982) from the    Sta1982b
                       orbit of Baize (1983).                                                  Baz1983a
                       See Baize & Petit (1989) catalog of doubles with variable component.    Baz1989d
           S   765     AC: H 6  32.                                                            MEv2010 
20474+2808 BRT3363     Originally published as BRT 219.                                        Brt1928 
20477+1519 BPM2266     [PM2000] 2394416 + [PM2000] 2393992.                                    Gvr2010 
20478+4750 ES  810     A is a spectroscopic binary.                                                    
20478+2519 POU4996     DH: Originally 20476+2518 POU4996, but primary found to be D component          
                       of 20478+2519 BUP 218AD.                                                        
                       DH: DAM 514DH.                                                                  
20478+1109 BPM2267     [PM2000] 2394709 + [PM2000] 2394870.                                    Gvr2010 
20478+0600 BU   65     13 Del. Variable.                                                               
                       This system has an estimated delta m of 3.6 magnitudes; the secondary           
                       probably lies just outside the observed window in the CFHT observation          
                       of 1985.521.                                                                    
20478-3636 LWR  17     BO Mic                                                                          
20480+3917 A  1434     One component is the Beta Lyrae-type system V367 Cyg, P = 18.6d.                
                       Variability of both components suspected.                                       
                       This observation was listed in Blazit et al. (1977) under its correct   Bla1977a
                       GC number, but misidentified as ADS 14394.                                      
                       AB,C: Additional notes may be found in Aitken (1932).                   A__1932a
20480+1816 BPM2268     [PM2000] 2395534 + [PM2000] 2395797.                                    Gvr2010 
20481+2727 BU   66     Includes V402 Vul, a Beta Lyr type eclipsing binary, P = 1.49938d.      Zas2012 
20481+1601 BPM2269     [PM2000] 2395849 + [PM2000] 2395614.                                    Gvr2010 
20482+3326 ES 2377     ES 2377a. See note for 20487+3334ES 9006.                                       
20484+4002 SEI1255     AB: Also known as J  1237AB.                                                    
20484+1134 BPM2270     [PM2000] 2396972 + [PM2000] 2396824.                                    Gvr2010 
20484+0426 AG  267     HJL 287.                                                                HJL1986 
20484-1812 S   763     AB: H N  10.                                                            MEv2010 
                       B is BD-18@5778.                                                                
                       CD: ARA 501.                                                                    
20485+1628 BPM2271     [PM2000] 2397156 + [PM2000] 2397510.                                    Gvr2010 
20485+1545 BPM2272     [PM2000] 2397328 + [PM2000] 2397127.                                    Gvr2010 
20485-4359 DON 992     iot Mic                                                                         
20486+1223 BPM2273     [PM2000] 2397439 + [PM2000] 2397606.                                    Gvr2010 
20487+5155 STF2732     H 2 100.                                                                MEv2010 
20487+3334 ES 9006     This pair was not given a designation in Es_1930, but followed ES 2377          
                       in Espin's list of measures. As a result, it was erroneously listed     Es_1930 
                       as ES 2377AC. Also, ES 2377 was incorrectly assigned this pair's WDS            
                       designation.                                                                    
20488+3426 SEI1256     V2247 Cyg. Primary is eclipsing binary of Algol-type, period 1.25486d.  Zas2014 
20488+1943 JNN 286     G 144-39. Estimated age 1000-10000 Myr; masses 0.50 +/- 0.07 and 0.24           
                       +/- 0.05 Msun; a ~7.4 au.                                               Jnn2014 
20488+1106 BPM2274     [PM2000] 2398470 + [PM2000] 2398468.                                    Gvr2010 
20488+0512 OSO 135     C is not a common proper motion companion to A                          Oso2004 
20489+4607 HJ 1581     55 Cyg. Variable.                                                               
20489+1558 BPM2275     [PM2000] 2398740 + [PM2000] 2398905.                                    Gvr2010 
20489-6847 SHY 782     HIP 102725 + HIP 103917.                                                        
20491+3640 SEI1260     ALI 428.                                                                        
20493+5845 STTA211     B is BD+58@2176.                                                                
                       Optical pair, based on study of relative motion of the components               
                       using the method of apparent motion parameters.                         Kiy2008 
20493+3923 ALI 952     BC: Originally 20492+3917 ALI 952AB, but primary found to be B                  
                       component of 20493+3923 SEI1263AB.                                              
                       Hipparcos suspected non-single.                                                 
           DAM  26     BD: Originally 20492+3917 DAM  26AC.                                            
20493+3314 ES   31     A is a semiregular variable.                                                    
20493+0156 OSO 136     G025-005. Not a common proper motion pair, based on color and                   
                       comparison with POSS2 red plates.                                       Oso2004 
20493-1945 ALP  25     2MASSW J2049197-194432                                                          
                       Physical companionship to this ultracool dwarf ruled out based on I-J           
                       color, using I-band photometry taken at WIYN in August 2002.            AlP2007 
20494+1124 J   194     Triple solution together with C (HIP 102784), which is clearly                  
                       optical with a faulty HIP position.                                     Sod1999 
                       See Baize & Petit (1989) catalog of doubles with variable component.    Baz1989d
                       AB: Malkov et al. (2012) derive dynamical, photometric, and                     
                       spectroscopic masses 1.09 +/- 0.67, 1.42, and 0.65 Msun, respectively.  Mlk2012 
20495+1106 BPM2276     [PM2000] 2400680 + [PM2000] 2400282.                                    Gvr2010 
20496+5008 ES   94     Spectrum of B: F8V.                                                             
20496+1233 BU 1495     15 Del.                                                                         
20497+2825 MLB 534     Aka  J  2323.                                                           Dam2013 
20497+1331 BPM2277     [PM2000] 2401465 + [PM2000] 2401398.                                    Gvr2010 
20498-2829 LDS 725     NLTT 49943/49942                                                        Chm2004 
20499+3531 SEI1266     ALI 208.                                                                        
20500+0533 STTA210     B is BD+04@4556.                                                                
20500-1154 BRG  31     2MASS J20500010-1154092 has a close companion detected with AstraLux,           
                       but it has not yet been confirmed through common proper motion.                 
                       However, since the separation is quite small (~0.47") and the                   
                       brightness and color of the companion is consistent with expectations,          
                       the system counts as binary for statistical purposes.                   Jnn2012 
20500-3347 HJ 5224     alp Mic                                                                         
20501+4404 STT 595     AB: 56 Cyg.                                                                     
                       AB: Optical pair, based on study of relative motion of the components           
                       using the method of apparent motion parameters.                         Kiy2008 
                       AB: Rectilinear solution by Hurowitz et al. (2014).                     USN2014b
20501+1556 BPM2278     [PM2000] 2402829 + [PM2000] 2402581.                                    Gvr2010 
20501-2722 HJ 5226     B is CD-27@15066.                                                               
20503+1317 BPM2279     [PM2000] 2403584 + [PM2000] 2403791.                                    Gvr2010 
20504+1459 BPM2280     [PM2000] 2403969 + [PM2000] 2404177.                                    Gvr2010 
20506+1601 BPM2281     [PM2000] 2404763 + [PM2000] 2404604.                                    Gvr2010 
20507+1959 ROE  16     J 1141.                                                                         
20507-3116 B   997     Malkov et al. (2012) derive dynamical, photometric, and spectroscopic           
                       masses of 1.39 +/- 0.85, 2.28, and 1.10 Msun, respectively.             Mlk2012 
20509+1544 BPM2282     [PM2000] 2405705 + [PM2000] 2405767.                                    Gvr2010 
20510+3915 SEI1279     ALI 953.                                                                        
20510+3717 SEI1277     ALI 430.                                                                        
20511+3837 SEI1281     ID uncertain - no sign of SEI pair, and ALADIN only indicates one               
                       Astrographic Catalog star in vicinity of Scheiner's coordinates.        Sei1908 
20511+0526 GCB  59     Aka BAL3016.                                                                    
20511-0135 LDS 727     NLTT 50000/49999                                                        Chm2004 
20514+1619 BPM2283     [PM2000] 2407606 + [PM2000] 2407437.                                    Gvr2010 
20514-0538 STF2729     4 Aqr. Alternative spectra F5V+F7V.                                             
                       See Baize & Petit (1989) catalog of doubles with variable component.    Baz1989d
                       AB: H 1  44.  AC: H 6  58.                                              MEv2010 
                       AB: Malkov et al. (2012) derive dynamical, photometric, and                     
                       spectroscopic masses 3.78 +/- 2.08, 2.50, and 1.27 Msun, respectively.  Mlk2012 
20516-6226 RMK  26     Rectilinear solution by Letchford et al. (2018).                        Whi2018 
20517-4054 HJ 5228     B is CD-41@14265.                                                               
20519-1631 HJ 3001     Aka HJ 1590.                                                            Dam2013 
20520+1422 BRT1956     J 1891.                                                                         
20521+4438 HER  18     Additional notes may be found in Herbig (1962).                         Her1962 
20521+3439 Y Cyg       The classification is from Burkholder et al. (1997 ApJ 490, 328). This          
                       eclipsing binary is one of two known double-lined spectroscopic                 
                       binaries which are a runaway objects based on a  large absolute value   Gie1986 
                       of systemic velocity (Gies & Bolton 1986).                              Msn1998a
20522-1904 I   667     See listed this pair twice, as SEE 431 and SEE 432, both misidentified.         
                       Gogshall gave the correct BD identification, but with an erroneous              
                       position; see BDS 10561. Innes rediscovered the pair independently as           
                       I 667. See's angle for SEE 432 requires a correction of +16.9deg.               
                       This correction, the result of an erroneous position of the micrometer          
                       on the telescope, which remained unnoticed because See omitted the              
                       usual precaution of a determination of the parallel, must be applied            
                       to all measures made at the Lowell Observatory during the period                
                       1897.758 to 1897.793.                                                   B__1950c
20522-7519 HJ 5214     B is CPD-75@1660.                                                               
20523+1144 BPM2284     [PM2000] 2410767 + [PM2000] 2410355.                                    Gvr2010 
20523-0030 BAL 927     J 1712.                                                                         
20524+3724 SEI1287     No Astrographic Catalog objects near Scheiner's coordinates and         Sei1908 
                       no obvious binary in field - typo in original catalog?                          
20524+2008 HO  144     Rapid change. Distance < 0.1" 1933-1941. Quadrant uncertain.                    
20524+1353 BPM2285     [PM2000] 2411079 + [PM2000] 2411467.                                    Gvr2010 
20526-1609 SPF   2     Stumpf et al. (2011) estimate the period at 21 +/- 1 yr and the system  Spf2011 
                       mass at > 78 Mjup.  Near-IR colors suggest spectral types T1 +1/-4 and          
                       T2.5 +/- 1.                                                                     
                       SDSS J205235.31-160929.8. Bardalez Gagliuffi et al. (2015) derive a             
                       preliminary orbit for this very low-mass binary, deriving a system              
                       mass of 0.0823 +0.0037/-0.0027 Msun and spectral types L6.0 +/- 2.0             
                       and T2.0 +/- 0.05. (Note: the quoted 2453654.31 Julian date for tau_0           
                       does not appear to correspond to the best-fit T0. To was adjusted to            
                       2455054.31 for the orbit catalog figure.)                               BGg2015 
20527+4607 A   750     Only elements P and T of Muller (1955) were adjusted in computing       Mlr1955b
                       the solution of Starikova (1981).                                       Sta1981a
                       Malkov et al. (2012) derive dynamical, photometric, and spectroscopic           
                       masses of 2.02 +/- 0.42, 1.76, and 0.91 Msun, respectively.             Mlk2012 
20527+0720 STF2733     B is BD+06@4675.                                                                
20527-0859 MCA  64     mu Aqr = 6 Aqr. A long-period spectroscopic binary, P = 1782d, now              
                       resolved by speckle interferometry.                                             
20528+3925 SEI1290     ALI1149.                                                                        
20529+0529 GCB  60     J  3208.                                                                        
20531-1134 CHR 101     This system, first announced by McAlister and recalled in a later       McA1984b
                       McAlister paper after repeated attempts at confirmation, has been       McA1993 
                       restored. While perhaps still spurious, the subsequent confirmation or          
                       suspected duplicity (by another technique) makes the discovery                  
                       measurement somewhat more probable.                                             
20532-0221 JNN 126     LP 636-19.                                                                      
                       The M3.0 equal-flux binary was first resolved by Janson et al. (2012),  Jnn2012 
                       and has seen significant orbital motion. Its parallactic distance of            
                       37.9 +/- 5.7 pc (Shkolnik et al. 2012 ApJ 758, 56) implies a physical           
                       separation of ~3-5 au. The expected orbital period is 10-20y.           Bwl2015 
20533+6209 BUP 219     AB: Optical pair, based on study of relative motion of the components           
                       using the method of apparent motion parameters.                         Kiy2008 
                       AB: Rectilinear solution by Hurowitz et al. (2014).                     USN2014b
20534+3220 ES 2380     Aka BRT 285.                                                                    
20534+1742 BPM2286     [PM2000] 2414347 + [PM2000] 2414479.                                    Gvr2010 
20534-0227 BRT 509     BAL 259.                                                                        
20534-4923 SHY 784     HIP 103107 + HIP 103139.                                                        
20537+5918 A   751     Theta and rho for 1979.7699 were incorrectly given as 178.6 degrees             
                       and 0".106, respectively, by McAlister & Hendry (1982).                 McA1982d
                       Malkov et al. (2012) derive dynamical, photometric, and spectroscopic           
                       masses of 2.91 +/- 0.58, 3.41, and 2.69 Msun, respectively.             Mlk2012 
20537+2803 HJ 1589     Doolittle measure 1915.55: 2.3@, 6.65", 10.0-10.1 was assigned to       Doo1923 
                       20535+2751 MLB 572.                                                             
20538+3723 SEI1299     AB: ALI 675.                                                                    
           SEI1301     AC: No star seen on Aladin at AC2000 coordinates of primary. Published          
                       measure corresponds to difference between nonexistent primary and real          
                       B component. Thus the AC measure appears to be another AB measure but           
                       with an error in the coordinates of the A component.                            
20538+3702 SEI1300     J 1075.                                                                         
20538+1451 BPM2287     [PM2000] 2415723 + [PM2000] 2415593.                                    Gvr2010 
20539+1700 BPM2288     [PM2000] 2416138 + [PM2000] 2415981.                                    Gvr2010 
20539-5535 B   505     Measures uncertain, too close. Needs speckle.                                   
20541+4507 STT 422     Morlet et al. note that this has similar position angle, separation,    Mor2000 
                       and delta-m as HDS2979. HDS2979 removed.                                        
20542+1619 BPM2289     [PM2000] 2416997 + [PM2000] 2417339.                                    Gvr2010 
20542-2730 B   509     AC: Also known as TDT2618. The identical nature of these first                  
                       noted by Francisco Manuel Rica Romero.                                  FMR2001 
20543+2405 POU5056     30m error in transcribing epoch-1900 RA led to the incorrect WDS                
                       designation 20242+2401.                                                         
           POU5057     30m error in transcribing epoch-1900 RA led to the incorrect WDS                
                       designation 20242+2401.                                                         
20545+1054 BPM2290     [PM2000] 2417909 + [PM2000] 2417853.                                    Gvr2010 
20548+1403 BPM2291     [PM2000] 2419129 + [PM2000] 2419226.                                    Gvr2010 
20548-5827 B  2487     bet Ind                                                                         
20549+1236 BPM2292     [PM2000] 2419307 + [PM2000] 2419442.                                    Gvr2010 
20550+3929 SEI1311     ALI1150.                                                                        
20550+2805 BU  367     AB: Malkov et al. (2012) derive dynamical, photometric, and                     
                       spectroscopic masses 1.62 +/- 0.40, 2.21, and 1.02 Msun, respectively.  Mlk2012 
20550+1423 BPM2294     [PM2000] 2419657 + [PM2000] 2419593.                                    Gvr2010 
20550+1259 BPM2293     [PM2000] 2419506 + [PM2000] 2419671.                                    Gvr2010 
20551-5207 I    18     The known 3".9 pair I 18 with estimated period ~1700 yr cannot explain          
                       the acceleration.                                                       Tok2012a
                       CPM. Is the acceleration caused by this binary or sub-system?           Tok2014d
20552+3755 SEI1312     ALI 677.                                                                        
20553+4218 OSO 137     G212-007. AB, AC, AD, AF and AG are not common proper motion pairs,             
                       based on comparison with POSS2 red plates                               Oso2004 
20553+1236 BPM2295     [PM2000] 2420673 + [PM2000] 2420662.                                    Gvr2010 
20554+1442 BPM2296     [PM2000] 2420873 + [PM2000] 2420634.                                    Gvr2010 
20555-1400 LDS6418     Proper motion +1413 -459. Possible companion 2",                                
                       16th magnitude.                                                                 
                       Both components show false companions due to differential refraction    Skf2013 
                       in SDSS u-band images; but both stars are single at the resolution of           
                       the other SDSS images (well under 2" separation).                               
20556+3912 SEI1319     Primary not seen on POSS plate; may be either variable star or flaw on          
                       AC Potsdam plate.                                                               
20556+2845 BRT  53     Not found by Heintz at IDS position.                                    Hei1990b
20556+1744 BPM2297     [PM2000] 2421454 + [PM2000] 2421562.                                    Gvr2010 
20556+1234 HJ 1592     16 Del = chi Del. A is a spectroscopic binary.                                  
20557+0432 STF2735     H 1  61.                                                                MEv2010 
20558-1707 JAY   1     Upon discovery of the wide COM pair TOK 343AC by Tokovinin & Lepine,    Tok2012c
           JAY   2     the C component was found to be the primary of 20560-1711 JAY 2. The            
                       WDS designation of the JAY pair was changed to deflect its membership           
                       in this CPM multiple.                                                           
           TOK 343     AC : Also known as CAB  10.                                                     
                       Member of the bet Pic moving group.                                     Zuc2001b
20559-5555 HJ 5232     B is CPD-56@9562.                                                               
20560+0837 J  1346     J 1355.                                                                         
20561+3731 SEI1322     ID uncertain - no sign of SEI pair, and ALADIN only indicates one       Sei1908 
                       Astrographic Catalog star in vicinity of Scheiner's coordinates. Also           
                       not found by Heintz at IDS position.                                    Hei1985a
20564+5044 BU 1137     A is a spectroscopic binary.                                                    
20565-0134 HJ  927     B is BD-02@5407.                                                                
20566+4455 TRN  30     The image rotator was in an unknown state, so two possible theta                
                       values are listed for the 2001.7338 observation - one for zenith up             
                       and one for north up.                                                   Trn2008 
20567+5656 A   755     Possible quadrant change.                                                       
20567+1818 BPM2298     [PM2000] 2425028 + [PM2000] 2424959.                                    Gvr2010 
20567+1300 STF2736     HJ 1593 identified with this. Also, see Heintz.                         Hei1985a
20568+4254 ENG  77     AB and AC: Optical pairs, based on study of relative motion of the              
                       components using the method of apparent motion parameters.              Kiy2008 
20568-0449 LDS6420     NLTT 50192/50189                                                        Chm2004 
                       This star has a wide companion at about 14" as noted in e.g. the WDS            
                       catalog. It is however single in the separation range covered by the            
                       AstraLux data.                                                          Jnn2012 
20569-0942 BU 1034     7 Aqr.                                                                          
20570+2340 A   175     aka HO  639                                                                     
20571+1131 BPM2299     [PM2000] 2426496 + [PM2000] 2426811.                                    Gvr2010 
20571+0128 J  2332     BAL 1576.                                                                       
20572+4110 HDS2986     System looks triple; 1989.7114 measurement concerns the close binary.   Msn1999b
20573+1515 BPM2300     [PM2000] 2426904 + [PM2000] 2426494.                                    Gvr2010 
20573+1434 BPM2301     [PM2000] 2426917 + [PM2000] 2427177.                                    Gvr2010 
20577+5849 YSC 117     Da,Db: Originally 20572+5849YSC 117, but found to be D component of             
                       20577+5849ARN  34AD.                                                            
20577+2624 RAO  24     A new 0".6 binary detected by Robo-AO. It was targeted because of its  .        
                       variable velocity (Nordstrom et al. 2004) and astrometric              Nrd2004  
                       acceleration (Makarov & Kaplan 2005). The binary is confirmed here,    Mkr2005  
                       helped by the large PM of the primary. Our photometry places B above   .        
                       the MS. According to Guillout et al. (2009 A&A 504, 829), the target   .        
                       is young, so its companion could indeed be a PMS star. The object was  .        
                       already targeted by Metchev & Hillenbrand (2009) in their survey of    Met2009  
                       young stars, but the binary was not detected. After learning of our    .        
                       discovery, Metchev was able to extract a measurement of the star from  .        
                       the archival data (S. Metchev 2015, private communication).            Rbr2015d 
20579-3339 RED  26     M3, spectroscopic distance 73pc. 19" south of G1 dwarf HD 199410 =              
                       HIP 103481 = 2MASS J20575667-3338566. Proper motion for the G dwarf             
                       +057-079, appears to be minimal relative proper motion. Further                 
                       observations are required to confirm whether the two stars form a               
                       wide binary system.                                                     Red2007a
20580+3713 J  1076     SEI 1337.                                                                       
20580+1426 BPM2302     [PM2000] 2429096 + [PM2000] 2429082.                                    Gvr2010 
20582+1756 BPM2303     [PM2000] 2429755 + [PM2000] 2430103.                                    Gvr2010 
20582+0356 WSI  39     Aka BAL2551.                                                                    
20583+4428 GC 29274    Hipparcos astrometric solution adopted some elements from the orbit of  HIP1997d
                       Radford & Griffin (1975).                                               Grf1975b
20583+3904 SEI1340     ALI 956.                                                                        
20583+1542 JNN 154     2MASS J20581756+1541315 and J20581836+1541211, both from the Riaz et    Ria2006 
                       al. (2006) sample, are separated by only 10" and have comparable                
                       estimated distances (144 and 119 pc) as well as similar proper motions  XXX2010 
                       (e.g. Roser et al. 2010) and thus likely form a physical pair.          Jnn2012 
20584+1050 ENG  78     A is 18 Del = Musica, B is BD+10@4426. BD measures from Burnham,        Bu_1913 
                       WFC, Sturdy, and 2MASS were earlier                                     WFC1998 
                       erroneously labelled as being of the                                    Stu1994 
                       BC pair                                                                 TMA2003 
                       CHARA Array Limb-darkened diameter  1.111 +/- 0.028 mas.                CIA2009a
                       R =  9.00 +/- 0.31 \rsun, L =  47.6 +/-  1.8 \lsun,                             
                       Teff = 5054 +/-  81 K.                                                          
           MUG  16     AE: Spectral type of comoving E comp estimated M4-5, mass 0.19 Msun.    Mug2014 
20585+5028 STF2741     AB: H 1  97.                                                            MEv2010 
20585+1239 BPM2304     [PM2000] 2430706 + [PM2000] 2430642.                                    Gvr2010 
20587+3725 SEI1343     Secondary not seen on POSS plate at published coordinates; later                
                       matches assume there was a 2s error in published RA of the secondary.           
20587-7025 HJ 5231     A is the Algol-type system KZ Pav.                                              
                       Spectrum composite; F2+A2.                                                      
20588+1701 BPM2305     [PM2000] 2431836 + [PM2000] 2431563.                                    Gvr2010 
20589+1741 BRT2487     J 2335. J notes that these are two different pairs.                             
20591+0418 STF2737     eps Equ = 1 Equ. Primary is 2.03d SB1.                                  Tok2006 
                       AC: Star C (mag. 7.3, dF4) is in slow retrograde motion at 10".                 
                       Period of AC estimated at 5200y.                                        Tok2006 
                       AB,C: Hyperbolic orbit by Zeller (1965). Ephemeris covers 1831-2042.    Zel1965 
                       sigma = areal constant in the true orbit = 0.1952 arcsec^2/yr                   
                       q = periastron distance in the true orbit = 10".78                              
                       AB,C: HJL 288.                                                          HJL1986 
                       BC: H 3  21.                                                            MEv2010 
                       AB: Malkov et al. (2012) derive dynamical, photometric, and                     
                       spectroscopic masses 4.17 +/- 2.42, 2.73, and 1.33 Msun, respectively.  Mlk2012 
20591-1313 HU   83     Malkov et al. (2012) derive dynamical, photometric, and spectroscopic           
                       masses of 6.80 +/- 7.32, 3.36, and 1.45 Msun, respectively.             Mlk2012 
20592+3718 ALI 434     AC2000 position of secondary shows no star on Aladin images. Appears            
                       to be error in AC coordinates of secondary. Possibly an error in the            
                       reduction of the secondary measure. The companion at 45" appears to be          
                       the most likely intended companion.                                             
20592+1513 BPM2306     [PM2000] 2432866 + [PM2000] 2432830.                                    Gvr2010 
20592+1132 JCT   4     HJL 289.                                                                HJL1986 
20593+5303 JNN 287     Estimated age 1000-10000 Myr; masses 0.54 +/- 0.05 and 0.28 +/- 0.03            
                       Msun; a ~22.8 au.                                                       Jnn2014 
20594+1614 BPM2307     [PM2000] 2433655 + [PM2000] 2433548.                                    Gvr2010 
20596+3558 SEI1355     J 1151.                                                                         
20598+4731 MCA  65     59 Cyg. A is an irregular variable, V832 Cyg, and an interferometric            
                       binary. B is BD+46@3134.                                                        
           STF2743     AB: H 4  22.                                                            MEv2010 
                       AD: A 71" measure by Guillaume (1931) was incorrectly assigned to AD,   Gui1931 
                       resulting in later measures of that wide pair being similarly labelled          
                       as AD measures. These pairs have now been assigned to STF2743AE. A              
                       "rediscovery" of the 39" AD pair by Fay (2013) was incorrectly given    FyM2013d
                       the designation FYM 99AE. This measure has been merged with AD.                 
20598+3126 GYL  44     B is BD+30@4272.                                                                
20598+1649 STTA213     B is BD+16@4426.                                                                
                       Pair appears in an appendix list, not part of discoverer's regular              
                       numbering sequence.                                                             
20598+1455 BPM2308     [PM2000] 2434777 + [PM2000] 2434672.                                    Gvr2010 
20598-2028 TOK 370     First resolution of the close pair with acceleration. No RV data. This          
                       is an X-ray source.                                                     Tok2013b
20599+4016 COU2431     Aa: First resolution of primary, which was a known SB (period 112d).            
                       Metallicity estimates range from -0.78 to -0.14.                        Hor2012b
           LSC   1     Aa1,2: Docobo et al. (2014) use the spectroscopic elements of Goldberg          
                       et al. (2002 AJ 124, 1132), together with speckle data and Hipparcos            
                       parallax, to derive the remaining orbital elements. The resulting               
                       masses are 1.05 +/- 0.05 and 0.89 +/- 0.05 Msun.                        Doc2014h
                       Aa1,2: SB2, P=112.56d                                                   Tok2014d
           LEP  98     AD: SHY 337. Bayesian analysis by Shaya & Olling (2011) indicates very  Shy2011 
                       high (near 100%) probability pair is physical.                                  
           SEI1363     CR: Also known as BUP 221CR or LDS2480.                                         
           NLTT 50309  Combined spectroscopic/astrometric solution, based on high-resolution           
                       echelle spectra plus archival PTI visibility measurements.                      
                       Derived masses 1.1861 +/- 0.0057 and 0.9407 +/- 0.0049 Msun,                    
                       distance 40.571 +/- 0.052 pc.                                           Knc2010 
                       Malkov et al. (2012) derive dynamical, photometric, and spectroscopic           
                       masses 2.18 +/- 0.15, 2.37, and 1.10 Msun, respectively.                Mlk2012 
           HDS2989     Da,Db: Previously known as 20582+4011 HDS2989AB, but found to be the D          
                       component of the CPM pair LEP  98.                                              
                       Da,Db: Rectilinear solution by Hartkopf & Mason (2013).                 Hrt2013b