NGC 2608
(Redirected from Arp 12)
| 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 | |
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.
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
[edit]
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
