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sua1
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sua1
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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.uac or search.uac. It is somewhat similar to RGSC, which can search from lists of coordinates but cannot sort the output. The UA1 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 USNO A catalog.
Set the environment variable UA1_PATH to the directory containing the region files or UA1_ROOT to the directory below which the CDROMs (ua001, ua002,...ua010) are mounted. If neither environment variable is set, the default is to look at /data/ua.
The USNO-A1.0 has been superceded by the USNO-A2.0. Use sua2.
