NGC 908 is an unbarred spiral galaxy in the constellation Cetus. It was discovered on 20 September 1786 by William Herschel.[3] This galaxy is 56 million light years away from Earth. It is the main galaxy in the NGC 908 group, which also includes NGC 899, NGC 907, and IC 223.[4]
| NGC 908 | |
|---|---|
 NGC 908 imaged by the Very Large Telescope of ESO. | |
| Observation data (J2000 epoch) | |
| Constellation | Cetus |
| Right ascension | 02h 23m 04.6s[1] |
| Declination | −21° 14′ 02″[1] |
| Redshift | 1509 ± 5 km/s[1] |
| Distance | 56.0 ± 5.7 Mly (17.2 ± 1.8 Mpc)[1] |
| Group or cluster | NGC 908 group |
| Apparent magnitude (V) | 10.83[2] |
| Characteristics | |
| Type | SA(s)c [1] |
| Apparent size (V) | 6′.0 × 2′.6[1] |
| Other designations | |
| UGCA 27, MCG -04-06-035, PGC 9057[2] | |
NGC 908 has vigorous star formation and is a starburst galaxy. The galaxy has a three-arm spiral pattern; two of its arms have peculiar morphology. The galaxy has a bright central bulge. Clusters of young stars and star-forming knots can be seen in the arms. Starburst activity and the peculiar morphology of the galaxy indicate it had a close encounter with another galaxy, although none are visible now.[5]
Two supernovae have been observed in NGC 908:
- SN 1994ai (type Ic, mag. 17) was discovered by Robert McNaught on 20 December 1994.[6][7]
- SN 2006ce (type Ia, mag. 12.4) was discovered by Libert "Berto" Monard on 10 May 2006.[8][9]
Also, one luminous blue variable has been observed in this galaxy: AT 2021ablz (type LBV, mag. 20.6) was discovered by Pan-STARRS on 14 October 2021.[10]
See also
editReferences
edit- ^ a b c d e f "Results for NGC 908". NASA/IPAC Extragalactic Database. Retrieved 2006-11-18.
- ^ a b "Your NED Search Results". NASA/IPAC Extragalactic Database. Retrieved 2020-11-09.
- ^ Seligman, Courtney. "New General Catalogue Objects: NGC 908". Celestial Atlas. Retrieved 29 August 2024.
- ^ Dmitry Makarov and Igor Karachentsev (2011). "Galaxy groups and clouds in the local (z∼ 0.01) Universe". MNRAS. 412 (4): 2498–2520. arXiv:1011.6277. Bibcode:2011MNRAS.412.2498M. doi:10.1111/j.1365-2966.2010.18071.x. S2CID 119194025.
- ^ "The Starburst Galaxy NGC 908". ESO. 26 July 2006. Retrieved 9 November 2020.
- ^ Williams, A.; Martin, R.; Benetti, S. (1994). "Supernova 1994ai in NGC 908". International Astronomical Union Circular (6120): 1. Bibcode:1994IAUC.6120....1W.
- ^ "SN 1994ai". Transient Name Server. IAU. Retrieved 22 August 2024.
- ^ Ponticello, N. J.; Khandrika, H.; Madison, D. R.; Li, W.; Newton, J.; Crowley, T.; Puckett, T.; Monard, L. A. G.; Sehgal, A. (2006). "Supernovae 2006cb, 2006cc, 2006cd, 2006ce". International Astronomical Union Circular (8709): 1. Bibcode:2006IAUC.8709....1P.
- ^ "SN 2006ce". Transient Name Server. IAU. Retrieved 22 August 2024.
- ^ "SN 2021ablz". Transient Name Server. IAU. Retrieved 22 August 2024.
External links
edit
Media related to NGC 908 at Wikimedia Commons- NGC 908 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
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