NGC 24
{{Short description|Galaxy in the constellation Sculptor}}
{{Infobox galaxy
| name = NGC 24
| image = The hidden dark side of NGC 24.jpg
| alt = NGC 24
| caption = HST image of NGC 24
| epoch = J2000
| constellation name = Sculptor
| z = {{Val|0.00185|0.00001|fmt=commas}}
| h_radial_v = {{val|554.017|2.099|u=km/s|fmt=commas}}
| dist_ly = {{Convert|7.31|Mpc|Mly|order=flip|abbr=on|lk=on}}
| absmag_v = −17.61
| size_v = 5.7' x 1.5'
| notes =
| names = 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 {{Convert|7.31|Mpc|Mly|disp=out|abbr=off|lk=on}} distant from the Milky Way. It was discovered by British astronomer William Herschel in 1785, and measures some 40,000 light-years across. The general shape of this galaxy is specified by its morphological classification of SA(s)c, 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.
References
{{Reflist|refs=
{{cite simbad|title=NGC 24|access-date=16 January 2017}}
| last1=Koribalski | first1=B. S. | last2=Staveley-Smith | first2=L.
| last3=Kilborn | first3=V. A. | last4=Ryder | first4=S. D.
| last5=Kraan-Korteweg | first5=R. C. | last6=Ryan-Weber | first6=E. V.
| last7=Ekers | first7=R. D. | last8=Jerjen | first8=H.
| last9=Henning | first9=P. A. | last10=Putman | first10=M. E.
| last11=Zwaan | first11=M. A. | last12=de Blok | first12=W. J. G.
| last13=Calabretta | first13=M. R. | last14=Disney | first14=M. J.
| last15=Minchin | first15=R. F. | last16=Bhathal | first16=R.
| last17=Boyce | first17=P. J. | last18=Drinkwater | first18=M. J.
| last19=Freeman | first19=K. C. | last20=Gibson | first20=B. K.
| last21=Green | first21=A. J. | last22=Haynes | first22=R. F.
| last23=Juraszek | first23=S. | last24=Kesteven | first24=M. J.
| last25=Knezek | first25=P. M. | last26=Mader | first26=S.
| last27=Marquarding | first27=M. | last28=Meyer | first28=M.
| last29=Mould | first29=J. R. | last30=Oosterloo | first30=T.
| last31=O'Brien | first31=J. | last32=Price | first32=R. M.
| last33=Sadler | first33=E. M. | last34=Schröder | first34=A.
| last35=Stewart | first35=I. M. | last36=Stootman | first36=F.
| last37=Waugh | first37=M. | last38=Warren | first38=B. E.
| last39=Webster | first39=R. L. | last40=Wright | first40=A. E.
| title=The 1000 Brightest HIPASS Galaxies: H I Properties
| journal=The Astronomical Journal | volume=128 | issue=1 | pages=16–46 | date=July 2004
| doi=10.1086/421744 | bibcode=2004AJ....128...16K
| arxiv=astro-ph/0404436 | s2cid=16229767 | display-authors=1 }}
| last1=de Vaucouleurs | first1=G. | last2=de Vaucouleurs | first2=A.
| last3=Corwin | first3=H. G. Jr. | last4=Buta | first4=R. J.
| last5=Paturel | first5=G. | last6=Fouque | first6=P.
| title=Third reference catalogue of bright galaxies
| display-authors=1 | version=9 | date=1991
| publisher=Springer-Verlag | location=New York }}
| title=H I Studies of the Sculptor Group Galaxies. VIII. The Background Galaxies: NGC 24 and NGC 45
| last1=Chemin | first1=Laurent | last2=Carignan | first2=Claude
| last3=Drouin | first3=Nathalie | last4=Freeman | first4=Kenneth C.
| display-authors=1 | journal=The Astronomical Journal
| volume=132 | issue=6 | pages=2527–2538 | date=December 2006
| doi=10.1086/508859 | arxiv=astro-ph/0609148
| bibcode=2006AJ....132.2527C | s2cid=947116 }}
| title=The Local Tully-Fisher Relation for Dwarf Galaxies
| display-authors=1 | last1=Karachentsev | first1=Igor D.
| last2=Kaisina | first2=Elena I. | last3=Kashibadze Nasonova | first3=Olga G.
| journal=The Astronomical Journal
| volume=153 | issue=1 | id=6 | pages=17 | date=January 2017
| doi=10.3847/1538-3881/153/1/6 | arxiv=1611.02574
| bibcode=2017AJ....153....6K | s2cid=119388974 | doi-access=free }}
| title=The hidden dark side of NGC 24
| url=http://www.spacetelescope.org/images/potw1639a/
| website=www.spacetelescope.org
| access-date=26 September 2016 }}
| title=NASA/IPAC Extragalactic Database
| work=Results for NGC 0024
| url=http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+24&img_stamp=yes&extend=no
| access-date=2010-05-04}}
}}
External links
- {{commonscat-inline}}
- {{WikiSky}}
{{Catalogs|NGC=24|PGC=701}}
{{Ngc5}}{{Sculptor (constellation)}}
{{DEFAULTSORT:NGC 0024}}
Category:Unbarred spiral galaxies
Category:Sculptor (constellation)