NGC 797
NGC797 is a barred spiral galaxy in the constellation of Andromeda. Its velocity with respect to the cosmic microwave background is, which corresponds to a Hubble distance of. However, three non-redshift measurements give a much farther mean distance of. It was discovered by German-British astronomer William Herschel on 21 September 1786.
In 1971, Fritz Zwicky and his daughter, Margrit A. Zwicky, published Catalogue of Selected Compact Galaxies and of Post-Eruptive Galaxies, which showed that NGC 797 has an elliptical compact companion galaxy at the tip of its southwest spiral arm, and catalogued the galaxy pair as CGPG 0200.4+3753. The companion galaxy is catalogued as NGC 0797 NED01 and PGC 212899, among other designations.
NGC 797 and NGC 801 form a galaxy pair, and the distance between the two is about 150 kiloparsecs.