NGC 24 is a
spiral galaxy in the southern
constellation of
Sculptor, about 23.8
megalight-years distant from the
Milky Way.[3] It was discovered by British astronomer
William Herschel in 1785, and measures some 40,000 light-years across.[7] The general shape of this galaxy is specified by its
morphological classification of SA(s)c,[5] which indicates it is an
unbarred spiral with no ring-like structure and moderate to loosely-wound
spiral arms. This galaxy is positioned in the vicinity of the
Sculptor Group, but is actually a background object that is more than three times as distant. It may form a pair with another background galaxy,
NGC 45.[8]
References
^
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.
ISSN0004-6256.
S2CID18913331.