Astronomy:NGC 2608

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NGC 2608
File:NGC2608 - HST - Potw2023a.tiff
NGC 2608 imaged by the Hubble Space Telescope
Observation data (J2000 epoch)
ConstellationCancer
Right ascension 08h 35m 17.3294s [1]
Declination+28° 28′ 24.294″ [1]
Redshift0.007192±0.000009[1]
Helio radial velocity2,156±3 km/s[1]
Distance93.0 Mly (28.5 Mpc) [2]
Apparent magnitude (V)13.01 [1]
Characteristics
TypeSB(s)b [1]
Size~59,300 ly (18.18 kpc) (estimated)[1]
Apparent size (V)2.3′ × 1.4′[1]
Other designations
IRAS 08322+2838, Arp 12, UGC 4484, MCG+05-20-027, PGC 24111[1]

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 was discovered by German-British astronomer William Herschel on 12 March 1785.[3] It spans 62,000 light-years, approximately 60% of the Milky Way's diameter. 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 superimposed star".[4] NGC 2608 is now thought to be a pair of interacting galaxies.[5]

Supernovae

  • SN 1920A was discovered on 8 February 1920, with an apparent magnitude of 12.9, by German astronomer Max Wolf (1863–1932).[6] It reached peak brightness on 15 February 1920 at magnitude 12.05.[7] 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."[8]
  • SN 2001bg was discovered on 9 May 2001 (May 8.943 UT) by noted supernova hunter Tom Boles[9] of Coddenham, Suffolk, England, with a 0.36 m Schmidt-Cassegrain telescope.[10] When first observed, it had an apparent magnitude of 14; it later peaked at around 13.7.[11] Its spectrum indicates that it is a typical Type Ia supernova.[12]

See also

  • List of NGC objects (2001-3000)

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 "Results for NGC 2608". NASA and Caltech. http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+2608&img_stamp=yes&extend=no. 
  2. ↑ 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. doi:10.1111/j.1745-3933.2005.00056.x. Bibcode: 2005MNRAS.361L..20S. 
  3. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 2608". https://cseligman.com/text/atlas/ngc26.htm#2608. 
  4. ↑ Halton Arp (November 1966). "Atlas of Peculiar Galaxies". Astrophysical Journal Supplement 14: 1. doi:10.1086/190147. Bibcode: 1966ApJS...14....1A. 
  5. ↑ "NGC 2608". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+2608. 
  6. ↑ Wolf, Max (1920). "Nova oder Variabilis 3.1920 Cancre". Astronomische Nachrichten 210: 373. doi:10.1002/asna.19202102106. Bibcode: 1920AN....210..373W. 
  7. ↑ Baade, Walter (1938). "The Absolute Photographic Magnitude of Supernovae.". Astrophysical Journal 88: 285. doi:10.1086/143983. Bibcode: 1938ApJ....88..285B. 
  8. ↑ 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. 
  9. ↑ Tom Boles
  10. ↑ Hurst, G. M.; Boles, T.; Kerner, H. (2001). "Supernova 2001bg in NGC 2608". International Astronomical Union Circular (7621): 1. Bibcode: 2001IAUC.7621....1H. http://www.cbat.eps.harvard.edu/iauc/07600/07621.html#Item1. 
  11. ↑ "2001 Annual Report". Central Bureau of Astronomical Telegrams. 2002. http://www.cbat.eps.harvard.edu/Comm6/CBATReport2001.html. 
  12. ↑ Gal-Yam, A.; Shemmer, O.; Dann, J. (2001). "Supernova 2001bg in NGC 2608". International Astronomical Union Circular 7622: 2. Bibcode: 2001IAUC.7622....2G. http://www.cbat.eps.harvard.edu/iauc/07600/07622.html#Item2. 

Coordinates: Sky map 08h 35m 17.3294s, +28° 28′ 24.294″



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