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NGC 3938

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NGC 3938
Observation data (2000 epoch)
ConstellationUrsa Major[1]
Right ascension11h 52m 42.9s[1]
Declination+44° 07′ 17″[1]
Apparent magnitude (V)10.9[1]
Characteristics
TypeSpiral galaxy
Apparent size (V)5′.4 × 4′.9[1]

NGC 3938 is a spiral galaxy in the Ursa Major constellation. It was discovered on 6 February 1788 by William Herschel. It is one of the brightest spiral galaxies in the Ursa Major South galaxy group.[2] It is approximately 43 million light years away from Earth.[1] NGC 3938 is classified as type Sc under the Hubble sequence, a loosely wound spiral galaxy with a smaller and dimmer bulge.[3] The spiral arms of the galaxy contain many areas of ionized atomic hydrogen gas, more so towards the center.[4]

Supernova

A supernova has been identified within NGC 3938. SN 2005ay is a type II supernova that was discovered on 27 March 2005 by Doug Rich and had a magnitude of 15.6.[5]

NGC 3938 with supernova SN 2005ay

References

  1. ^ a b c d e f George Normandin (5 May 2005). "Spiral Galaxy NGC 3839". kopernik.org. Retrieved 30 December 2011.
  2. ^ "The Ursa Major Groups". Atlas of the Universe. Retrieved 30 December 2011.
  3. ^ van der Kruit, P.C.; Shostak, G.S. (1982). "Studies of Nearly Face-on Spiral Galaxies" (PDF). Astronomy and Astrophysics. EDP Sciences: 351–358. Retrieved 25 June 2014.
  4. ^ Jiménez-Vicente, J.; E. Battaner; M. Rozas; H. Castañeda; et al. (1999). "Fabry-Perot observations of the ionized gas in NGC 3938" (PDF). Astronomy and Astrophysics. EDP Sciences: 417–425. Retrieved 25 June 2014.
  5. ^ "Supernova 2005ay in NGC 3938". Rochester Astronomy. Retrieved 29 January 2013.