This SAOimage display shows the alignment of USNO-B1.0 Stars with a test image with a world coordinate system. immatch can be run to list matches between USNO-B1.0 stars and sources found in the image. The command used was
saoub1 test.fts -zoom 0.5 -histeqwhere saoub1 is
saoimage -reg `imub1 -r 10 $1` -wcscom sub1_-ha_%s $*Clicking the w key on the star closest to the center returns the following:
sub1 2.5, 8 December 1998, Doug Mink SAO Find closest star USNO B1 number RAJ2000 DecJ2000 MagB MagR Plate Arcsec 1575.03025735 09:55:23.431 +69:00:49.26 16.4 16.9 38 2.00