--- name: "sua2" section: "1" platform: "linux" package: "wcstools" version: "3.9.7-1.1+b1" release: "Debian 13 (Trixie)" platforms: ["linux"] url: "https://new.carta.tech/sua2" --- # sua2(1) Find USNO-A2.0 Catalog stars in a square on the sky ## Name sua2 - Find USNO-A2.0 Catalog stars in a square on the sky ## Synopsis sua2 \[options\] ra dec system ## Description *suac* finds all of the U.S. Naval Observatory A2.0 Catalog objects in a specified region of the sky and lists their sky positions and magnitudes in order of brightness. Output is to standard out, unless the -w flag is set, in which case it goes to objectname.uac or search.uac. It is a link to scat. ## Options **-a** list single closest catalog source **-b** Output B1950 (FK4) coordinates **-d** Sort by distance from center instead of flux **-e** Output ecliptic coordinates **-f** Output search center for other programs **-g** Output galactic coordinates **-h** Print heading, else do not **-i** Print catalog object name, not catalog number (=ua2\_region\_number) **-j** Output J2000 (FK5) coordinates **-l** Print center and closest star on one line **-m \[\\] \** Limiting catalog magnitude(s) (default none, bright -2 if only faint is given) **-n \** Number of brightest stars to print **-o \** Object name used to name output file **-p** Sort by distance from search center instead of brightness **-q \** Equinox of output positions in years **-r \** Search box half-width in arcsec or dd:mm:ss If negative, this is a radius; if two numbers, first is in right ascension, second is in declination. (default is 10, that is a 20x20 arcsec box) **-s** Sort by right ascension instead of flux **-t** Tab table output **-u \** Print X Y instead of number in front of non-tab entry **-v** Verbose listing of processing intermediate results **-w** Write tab table output file imagename.uac **-y** Epoch of output positions in years ## See Also [scat(1)](/scat/1.md), susac(1), imuac(1), [sgsc(1)](/sgsc/1.md) ## Author Jessica Mink, SAO (jmink@cfa.harvard.edu)