Cydonia

NGC 3697 is a spiral galaxy in the constellation of Leo.^[2] It was discovered on 24 February 1827 by John Herschel.^[4] It was described as "extremely faint, very small, extended 90°" by John Louis Emil Dreyer, the compiler of the New General Catalogue.^[4] It is a member of HCG 53, a compact group of galaxies.^[3]

One supernova, SN 2020aavb (type Ia, mag. 16), was discovered in NGC 3697 on 23 November, 2020.^[5]

References

^ ^a ^b Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W.; Chester, Thomas; Elias, Jonathan H.; Huchra, John P.; Liebert, James W.; Lonsdale, Carol J.; Monet, David G.; Price, Stephan; Seitzer, Patrick; Jarrett, Thomas H.; Kirkpatrick, J. Davy; Gizis, John E.; Howard, Elizabeth V.; Evans, Tracey E.; Fowler, John W.; Fullmer, Linda; Hurt, Robert L.; Light, Robert M.; Kopan, Eugene L.; Marsh, Kenneth A.; McCallon, Howard L.; Tam, Robert; Van Dyk, Schuyler D.; Wheelock, Sherry L. (1 February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131 (2): 1163–1183. Bibcode:2006AJ....131.1163S. doi:10.1086/498708. ISSN 0004-6256. S2CID 18913331.
^ ^a ^b ^c ^d ^e ^f ^g ^h "NED results for object NGC 3697". National Aeronautics and Space Administration / Infrared Processing and Analysis Center. Retrieved 9 November 2017.
^ ^a ^b ^c ^d "NGC 3697". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 9 November 2017.
^ ^a ^b "New General Catalog Objects: NGC 3650 - 3699". cseligman.com. Retrieved 9 November 2017.
^ Transient Name Server entry for SN 2020aavb. Retrieved 24 March 2023.