NGC 24

NGC 24
NGC 24
	HST image of NGC 24
Observation data (J2000 epoch)
Constellation	Sculptor
Right ascension	00h 09m 56.542s
Declination	−24° 57′ 47.27″
Redshift	0.00185±0.00001
Heliocentric radial velocity	554.017±2.099 km/s
Distance	23.8 Mly (7.31 Mpc)
Apparent magnitude (V)	12.4
Absolute magnitude (V)	−17.61
Characteristics
Type	SA(s)c
Apparent size (V)	5.7' x 1.5'
Other designations
	UGCA 2, ESO 472-G016, MCG-04-01-018, ESO-LV 4720160, PGC 701, CGS 119

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

^ ^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 Koribalski, B. S.; et al. (July 2004). "The 1000 Brightest HIPASS Galaxies: H I Properties". The Astronomical Journal. 128 (1): 16–46. arXiv:astro-ph/0404436. Bibcode:2004AJ....128...16K. doi:10.1086/421744. S2CID 16229767.
^ ^a ^b Karachentsev, Igor D.; et al. (January 2017). "The Local Tully-Fisher Relation for Dwarf Galaxies". The Astronomical Journal. 153 (1): 17. arXiv:1611.02574. Bibcode:2017AJ....153....6K. doi:10.3847/1538-3881/153/1/6. S2CID 119388974. 6.
^ ^a ^b "NASA/IPAC Extragalactic Database". Results for NGC 0024. Retrieved 2010-05-04.
^ ^a ^b de Vaucouleurs, G.; et al. (1991). Third reference catalogue of bright galaxies. 9. New York: Springer-Verlag.
^ "NGC 24". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 16 January 2017.
^ "The hidden dark side of NGC 24". www.spacetelescope.org. Retrieved 26 September 2016.
^ Chemin, Laurent; et al. (December 2006). "H I Studies of the Sculptor Group Galaxies. VIII. The Background Galaxies: NGC 24 and NGC 45". The Astronomical Journal. 132 (6): 2527–2538. arXiv:astro-ph/0609148. Bibcode:2006AJ....132.2527C. doi:10.1086/508859. S2CID 947116.

External links

Media related to NGC 24 at Wikimedia Commons
NGC 24 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images

[Skrutskie2006-1] 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.

[Koribalski2004-2] Koribalski, B. S.; et al. (July 2004). "The 1000 Brightest HIPASS Galaxies: H I Properties". The Astronomical Journal. 128 (1): 16–46. arXiv:astro-ph/0404436. Bibcode:2004AJ....128...16K. doi:10.1086/421744. S2CID 16229767.

[Karachentsev2017-3] Karachentsev, Igor D.; et al. (January 2017). "The Local Tully-Fisher Relation for Dwarf Galaxies". The Astronomical Journal. 153 (1): 17. arXiv:1611.02574. Bibcode:2017AJ....153....6K. doi:10.3847/1538-3881/153/1/6. S2CID 119388974. 6.

[ned-4] "NASA/IPAC Extragalactic Database". Results for NGC 0024. Retrieved 2010-05-04.

[vaucoulerus1991-5] Vaucouleurs, G.; et al. (1991). Third reference catalogue of bright galaxies. 9. New York: Springer-Verlag.

[SIMBAD-6] "NGC 24". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 16 January 2017.

[HST-7] "The hidden dark side of NGC 24". www.spacetelescope.org. Retrieved 26 September 2016.

[Chemin2006-8] Chemin, Laurent; et al. (December 2006). "H I Studies of the Sculptor Group Galaxies. VIII. The Background Galaxies: NGC 24 and NGC 45". The Astronomical Journal. 132 (6): 2527–2538. arXiv:astro-ph/0609148. Bibcode:2006AJ....132.2527C. doi:10.1086/508859. S2CID 947116.

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