NGC 2608 (also known as Arp 12) is a barred spiral galaxy located 93 million light-years away in the constellation Cancer (the Crab). It is 62,000 light-years across, and about 60% of the width of the Milky Way. It is considered a grand design spiral galaxy and is classified as SB(s)b, meaning that the galaxy's arms wind moderately (neither tightly nor loosely) around the prominent central bar.
| NGC 2608 | |
|---|---|
 Hubble Space Telescope image of NGC 2608 | |
| Observation data (J2000 epoch) | |
| Constellation | Cancer |
| Right ascension | 08h 35m 17.3s [1] |
| Declination | +28° 28′ 24″ [1] |
| Redshift | 0.007122 (2135±8 km/s)[1] |
| Distance | 93.0 Mly (28.5 Mpc) [2] |
| Apparent magnitude (V) | 13.01 [1] |
| Characteristics | |
| Type | SB(s)b [1] |
| Apparent size (V) | 2.3 × 1.4 arcmin [1] |
| Other designations | |
| Arp 012, PGC 024111 | |
It was classified under "galaxies with split arms" in the 1966 Atlas of Peculiar Galaxies by Halton Arp, who noted that the "nucleus may be double or superposed star".[3] NGC 2608 is now considered to be a pair of interacting galaxies.[4]
- SN 1920A was discovered at magnitude 12.9 on 8 February 1920, by German astronomer Max Wolf (1863–1932).[5] It peaked in brightness on 15 February 1920 at magnitude 12.05.[6] Its visual magnitude implies an overluminous bolometric magnitude; SN 1920A has since been classified as anomalous and is believed to be the result of "a completely different explosion mechanism."[7]
- SN 2001bg was discovered on 9 May 2001 (May 8.943 UT) by noted supernova hunter Tom Boles[8] of Coddenham, Suffolk, England, with a 0.36 m Schmidt-Cassegrain telescope.[9] When first observed it was magnitude 14; it later peaked at around 13.7.[10] Its spectrum indicates that it is a typical Type Ia supernova.[11]
References
edit- ^ a b c d e f "NASA/IPAC Extragalactic Database". Results for NGC 2608. Retrieved 7 Dec 2008.
- ^ Seigar, Marc S. (Jul 2005). "The connection between shear and star formation in spiral galaxies". Monthly Notices of the Royal Astronomical Society: Letters. 361 (1): L20–L24. arXiv:astro-ph/0504529. Bibcode:2005MNRAS.361L..20S. doi:10.1111/j.1745-3933.2005.00056.x. S2CID 14616885.
- ^ Halton Arp (November 1966). "Atlas of Peculiar Galaxies". Astrophysical Journal Supplement. 14: 1. Bibcode:1966ApJS...14....1A. doi:10.1086/190147.
- ^ "NGC 2608". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 8 December 2008.
- ^ Wolf, Max (1920). "Nova oder Variabilis 3.1920 Cancre". Astronomische Nachrichten. 210: 373. Bibcode:1920AN....210..373W. doi:10.1002/asna.19202102106.
- ^ Baade, Walter (1938). "The Absolute Photographic Magnitude of Supernovae". Astrophysical Journal. 88: 285. Bibcode:1938ApJ....88..285B. doi:10.1086/143983.
- ^ Schaefer, Bradley E.; Girard, Terrence M.; arjun (2000). "Weird Supernovae: Superluminous, Superfast and Superfaint Examples". Anni Mirabiles, A Symposium Celebrating the 90th Birthday of Dorrit Hoffleit Held 7–8 March 1997 at Yale University, New Haven, CT.: 69–70. Bibcode:1999anmi.conf...69S.
- ^ Tom Boles
- ^ "International Astronomical Union Circular". Supernova 2001bg in NGC 2608. Central Bureau for Astronomical Telegrams. 9 May 2001. Retrieved 8 December 2008.
- ^ "2001 Annual Report". Central Bureau of Astronomical Telegrams. 2002. Retrieved 5 July 2011.
- ^ Gal-Yam, A.; Shemmer, O.; Dann, J. (2001). "Supernova 2001bg in NGC 2608". International Astronomical Union Circular. 7622: 2. Bibcode:2001IAUC.7622....2G.
External links
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Wikimedia Commons has media related to NGC 2608.
- NGC 2608 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images