Technique                       Total|Mean Sep. (as)|Median Sep. (as)
 A  Adaptive Optics                  23687          3.257          1.396 
 C  CCD (long focus)                115915         20.950          8.887 
 D  Heliometer                        1702         30.619         10.475 
 E  Wide-field CCD                  569077         46.146         14.640 
 H  Space-based technique           641122         41.028          8.755 
 I  Interferometry                     907          0.273          0.164 
 J  Visual Interferometer             4180          0.213          0.128 
 K  Long-Baseline Interferometer      5035          0.437          0.049 
 M  Micrometer                      425136         10.246          2.140 
 O  Occultation                       2430          0.573          0.100 
 P  Photography                     184975         32.912         13.290 
 S  Speckle Interferometer          133247          1.201          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                       99779         37.102         19.480 
 -  Unknown                           2421         76.220         13.620