Man pages matching name fits-flip-endian in section 1:

fits-flip-endian.1.en	debian 10 / astrometry.net
fits-flip-endian.1.en	debian 11 / astrometry.net
fits-flip-endian.1.en	debian 12 / astrometry.net
fits-flip-endian.1.en	debian 13 / astrometry.net