NGC 3938
| NGC 3938 | |
|---|---|
 | |
| Observation data (2000 epoch) | |
| Constellation | Ursa Major[1] |
| Right ascension | 11h 52m 42.9s[1] |
| Declination | +44° 07′ 17″[1] |
| Apparent magnitude (V) | 10.9[1] |
| Characteristics | |
| Type | Spiral galaxy |
| Apparent size (V) | 5′.4 × 4′.9[1] |
NGC 3938 is an unbarred 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 and had a magnitude of 15.6.[5]
NGC 3938 with supernova SN 2005ay
References
- 1 2 3 4 5 6 George Normandin (5 May 2005). "Spiral Galaxy NGC 3839". kopernik.org. Retrieved 30 December 2011.
- ↑ "The Ursa Major Groups". Atlas of the Universe. Retrieved 30 December 2011.
- ↑ van der Kruit, P.C.; Shostak, G.S. (1982). "Studies of Nearly Face-on Spiral Galaxies" (PDF). Astronomy and Astrophysics. EDP Sciences: 351–358. Bibcode:1982A&A...105..351V. Retrieved 25 June 2014.
- ↑ 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. arXiv:astro-ph/9811391
. Bibcode:1999A&A...342..417J. Retrieved 25 June 2014. - ↑ "Supernova 2005ay in NGC 3938". Rochester Astronomy. Retrieved 29 January 2013.
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