Technique                       Total|Mean Sep. (as)|Median Sep. (as)
 A  Adaptive Optics                  23744          3.254          1.393 
 C  CCD (long focus)                116816         20.921          8.894 
 D  Heliometer                        1732         31.211         10.525 
 E  Wide-field CCD                  569581         46.130         14.640 
 H  Space-based technique           642915         41.170          8.760 
 I  Interferometry                     907          0.273          0.164 
 J  Visual Interferometer             4181          0.213          0.128 
 K  Long-Baseline Interferometer      5102          0.431          0.048 
 M  Micrometer                      425347         10.250          2.140 
 O  Occultation                       2439          0.581          0.100 
 P  Photography                     185295         32.948         13.300 
 S  Speckle Interferometer          133937          1.268          0.474 
 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                       99989         37.102         19.480 
 -  Unknown                           2410         76.585         13.870