WCSTools

susa1
USNO-SA1.0 Catalog Search Program

 WCSTools programs
susa1 finds objects in the U.S. Naval Observatory SA1.0 Catalog within a specified region of the sky and lists their sky positions or lists specific entries in that catalog. It is a symbolic link to scat, and is equivalent to running scat -c usa1 ....

By default, only the brightest 100 objects (or closest 100, if the -p option is used) are returned. Use the -n option to increase this number.

Output is to standard out, unless the -w flag is set, in which case it goes to objectname.usa1 or search.usa1. It is somewhat similar to RGSC, which can search from lists of coordinates but cannot sort the output. The USA1 number is the zone ((90 + declination in degrees) * 10) followed by the sequence number of the star within the RA-sorted zone. This number will change with each release of the SA catalog.

Set the environment variable USA1_PATH to the directory containing the CDROM. If the environment variable is not set, the default is to look at /data/usnosa10.

The USNO-SA1.0 has been superceded by the USNO-SA2.0. Use susa2.

Command Line Arguments

Examples

Search with results to standard output
Search with results to a file
Find closest star
Find stars by number

Last updated 30 July 2002 by Doug Mink dmink@cfa.harvard.edu

Telescope Data Center