xy2sky(1) on Linux
The text 845f43ec7ac0, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch) shipped it. The page shows this text now.
Compute RA Dec from X Y using WCS in FITS and IRAF image files
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