Use sgsc
to identify the closest HST Guide Star
Run SAOimage
saoimage -wcscom sgsc_-har_15_%s test.fit
Whenever you click w, sgsc will be called to find
the closest star within 15 arcseconds of the current cursor location,
giving the distance from the cursor in the last column:
sgsc 2.5, 29 October 1998, Doug Mink SAO Find closest star
GSC number RAJ2000 DecJ2000 Mag Type Arcsec
4383.0434 09:54:31.937 +69:01:26.94 12.00 0 0.90
sgsc 2.5, 29 October 1998, Doug Mink SAO Find closest star
GSC number RAJ2000 DecJ2000 Mag Type Arcsec
4383.0863 09:54:19.037 +69:02:38.62 12.34 0 1.62
sgsc 2.5, 29 October 1998, Doug Mink SAO Find closest star
GSC number RAJ2000 DecJ2000 Mag Type Arcsec
4383.0613 09:54:45.578 +68:56:59.46 11.93 0 1.28
[SAOimage]
[SAOimage WCS]
[SAOimage WCS Cursor Commands]
[WCSTools]
[sgsc]