imusa2 - Man Page

Find USNO-SA2.0 stars in FITS or IRAF image files


imua2 [options] FITS or IRAF file(s)


Search USNO-SA2.0 Catalog within the area described by the world coordinate system in an image header.  This is a link to imcat rather than a separate executable.


-b [<RA> <Dec>]

Output in B1950, optional new image center in B1950 (FK4) RA and Dec


Print heading, else do not

-j [<RA> <Dec>]

Output in J2000, optional new image center in J2000 (FK5) RA and Dec

-m [<bright magnitude>] <faint magnitude>

Limiting catalog magnitude(s) (default none, bright -2 if only faint is given)

-n <num>

Number of brightest stars to print

-p <scale>

Initial plate scale in arcsec per pixel (default 0)


Sort by RA instead of flux


Tab table to standard output as well as file


USNO catalog single plate number to accept


Verbose listing of processing intermediate results


Write tab table output file -z Use AIPS classic projections instead of WCSLIB; use CD matrix or CDELT instead of polynomial solution.

See Also


Web Page


Jessica Mink, SAO (

Referenced By


WCS 14 April 1998