NGC 251 is a spiral galaxy in the constellation of Pisces. It was discovered on October 15, 1784, by Frederick William Herschel.
One supernova has been observed in NGC 251: SN 2023rky (type II, mag. 18.6).[4]
^ abSkrutskie, 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.
^ abcdef"NED results for object NGC 0251". National Aeronautics and Space Administration / Infrared Processing and Analysis Center. Retrieved 5 May 2017.
^ ab"NGC 251". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 5 May 2017.
^Transient Name Server entry for SN 2023rky. Retrieved 7 September 2023.
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NGC251 is a spiral galaxy in the constellation of Pisces. It was discovered on October 15, 1784, by Frederick William Herschel. One supernova has been...
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Caldwell Objects (2nd ed.). Cambridge University Press. p. 251. ISBN 9781316033531. "NGC 2506". SIMBAD. Centre de données astronomiques de Strasbourg...
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