NGC 797
Galaxy in the constellation Andromeda
NGC 797 (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 5,414±17 km/s, which corresponds to a Hubble distance of 260.4 ± 18.3 Mly (79.85 ± 5.60 Mpc). However, three non-redshift measurements give a much farther mean distance of 369.64 ± 4.35 Mly (113.333 ± 1.333 Mpc). 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.
01Supernova
Sources and credits
This article is adapted from the Wikipedia article “NGC 797”, written by its contributors and licensed under CC BY-SA 4.0. Fathomly has changed the layout, removed citation markers, navigation and maintenance notices, and adjusted punctuation. This adapted version is shared under the same license. For references, see the original article.
Images, from Wikimedia Commons:
- NGC 797 PanS.jpg by Donald Pelletier, CC BY-SA 4.0
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