NGC 251

Last updated
NGC 251
NGC251 - SDSS DR14.jpg
SDSS image of NGC 251
Observation data (J2000 epoch)
Constellation Pisces
Right ascension 00h 47m 54.031s [1]
Declination +19° 35 48.51 [1]
Redshift 0.015184 [2]
Helio radial velocity 4552 km/s [2]
Distance 204.36 ± 12.64  Mly (62.657 ± 3.876  Mpc) [2]
Apparent magnitude  (B)14.6 [3]
Characteristics
Type Sc [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.

Contents

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

Notes

  1. POSS1 103a-O values used.

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References

  1. 1 2 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. 1 2 3 4 5 6 "NED results for object NGC 0251". National Aeronautics and Space Administration / Infrared Processing and Analysis Center . Retrieved 5 May 2017.
  3. 1 2 "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.