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NGC 251

From Wikipedia, the free encyclopedia

NGC 251
SDSS image of NGC 251
Observation data (J2000 epoch)
ConstellationPisces
Right ascension00h 47m 54.031s[1]
Declination+19° 35′ 48.51″[1]
Redshift0.015184[2]
Heliocentric radial velocity4552 km/s[2]
Distance204.36 ± 12.64 Mly (62.657 ± 3.876 Mpc)[2]
Apparent magnitude (B)14.6[3]
Characteristics
TypeSc[2]
Size148,600 ly (45,570 pc)[2][note 1]
Apparent size (V)2.4′ × 1.9′[2]
Other designations
UGC 490, MGC+03-03-003, PGC 2806[3]

NGC 251 is a spiral galaxy in the constellation of Pisces. It was discovered on October 15, 1784, by Frederick William Herschel.

One supernova has been observed in NGC 251: SN 2023rky (type II, mag. 18.6).[4]

Notes

  1. ^ POSS1 103a-O values used.

References

  1. ^ a b Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W.; Chester, Thomas; Elias, Jonathan H.; Huchra, John P.; Liebert, James W.; Lonsdale, Carol J.; Monet, David G.; Price, Stephan; Seitzer, Patrick; Jarrett, Thomas H.; Kirkpatrick, J. Davy; Gizis, John E.; Howard, Elizabeth V.; Evans, Tracey E.; Fowler, John W.; Fullmer, Linda; Hurt, Robert L.; Light, Robert M.; Kopan, Eugene L.; Marsh, Kenneth A.; McCallon, Howard L.; Tam, Robert; Van Dyk, Schuyler D.; Wheelock, Sherry L. (1 February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131 (2): 1163–1183. Bibcode:2006AJ....131.1163S. doi:10.1086/498708. ISSN 0004-6256. S2CID 18913331.
  2. ^ a b c d e f "NED results for object NGC 0251". National Aeronautics and Space Administration / Infrared Processing and Analysis Center. Retrieved 5 May 2017.
  3. ^ a b "NGC 251". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 5 May 2017.
  4. ^ Transient Name Server entry for SN 2023rky. Retrieved 7 September 2023.

External links


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This page was last edited on 8 September 2023, at 00:56
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