Technique                       Total|Mean Sep. (as)|Median Sep. (as)
 A  Adaptive Optics                  23744          3.254          1.393 
 C  CCD (long focus)                116781         20.923          8.896 
 D  Heliometer                        1702         30.619         10.475 
 E  Wide-field CCD                  569570         46.130         14.640 
 H  Space-based technique           642639         41.161          8.760 
 I  Interferometry                     907          0.273          0.164 
 J  Visual Interferometer             4180          0.213          0.128 
 K  Long-Baseline Interferometer      5102          0.431          0.048 
 M  Micrometer                      425346         10.250          2.140 
 O  Occultation                       2430          0.573          0.100 
 P  Photography                     185290         32.948         13.300 
 S  Speckle Interferometer          133427          1.272          0.476 
 T  Transit Instrument               10916        145.787         42.022 
 V  Visual Estimate                     62         54.657         12.600 
 X  Spectroscopy                       536         14.060         10.000 
 Z  Photometer                       99984         37.102         19.480 
 -  Unknown                           2413         76.493         13.805