Technique                       Total|Mean Sep. (as)|Median Sep. (as)
 A  Adaptive Optics                  24423          3.154          1.190 
 C  CCD (long focus)                117068         20.931          8.890 
 D  Heliometer                        1732         31.211         10.525 
 E  Wide-field CCD                  569672         46.130         14.640 
 H  Space-based technique           643925         41.123          8.760 
 I  Interferometry                     907          0.273          0.164 
 J  Visual Interferometer             4181          0.213          0.128 
 K  Long-Baseline Interferometer      5175          0.427          0.048 
 M  Micrometer                      425348         10.250          2.140 
 O  Occultation                       2443          0.580          0.100 
 P  Photography                     185724         32.997         13.313 
 S  Speckle Interferometer          135640          1.267          0.478 
 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                      100000         37.102         19.480 
 -  Unknown                           2408         76.656         13.900