NGC797 (also known as NGC 797 NED02) 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.
Supernova One supernova has been observed in NGC 797: SN2025pel (TypeIa, mag. 18.41) was discovered by GOTO on 17 June 2025.
See also List of NGC objects (1–1000)
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