NGC 4945
From Wikipedia, the free encyclopedia
| NGC 4945 | |
|---|---|
 NGC 4945 image take by the MPG/ESO 2.2-metre telescope at La Silla Observatory. |
|
| Observation data (J2000 epoch) | |
| Constellation | Centaurus |
| Right ascension | 13h 05m 27.5s[1] |
| Declination | -49° 28′ 06″[1] |
| Redshift | 563 ± 3 km/s[1] |
| Distance | 11.7 Mly (3.6 Mpc)[2] |
| Type | SB(s)cd[1] |
| Apparent dimensions (V) | 20′.0 × 3′.8[1] |
| Apparent magnitude (V) | 9.3[1] |
| Other designations | |
| PGC 45279[1], Caldwell 83 | |
| See also: Galaxy, List of galaxies | |
Coordinates: 
13h 05m 27.5s, −49° 28′ 06″
NGC 4945 is a spiral galaxy in the constellation Centaurus. It is thought to be quite similar to the Milky Way Galaxy, but X-ray observations show that NGC 4945 has an unusual, energetic, Seyfert 2 nucleus that might house a large black hole. It was discovered by James Dunlop in 1826.[3]
[edit] Galaxy group information
NGC 4945 one of the brightest galaxies within the Centaurus A/M83 Group, a large, nearby group of galaxies. The galaxy is the second brightest galaxy within the subgroup centered on Centaurus A.[2][4]
[edit] References
- ^ a b c d e f g "NASA/IPAC Extragalactic Database". Results for NGC 4945. http://nedwww.ipac.caltech.edu/. Retrieved 2006-11-25.
- ^ a b I. D. Karachentsev, M. E. Sharina, A. E. Dolphin, E. K. Grebel, D. Geisler, P. Guhathakurta, P. W. Hodge, V. E. Karachentseva, A. Sarajedini, P. Seitzer (2002). "New distances to galaxies in the Centaurus A group". Astronomy and Astrophysics 385 (1): 21–31. Bibcode 2002A&A...385...21K. doi:10.1051/0004-6361:20020042.
- ^ http://www.sciencedaily.com/releases/2009/09/090902112111.htm
- ^ I. D. Karachentsev (2005). "The Local Group and Other Neighboring Galaxy Groups". Astronomical Journal 129 (1): 178–188. arXiv:astro-ph/0410065. Bibcode 2005AJ....129..178K. doi:10.1086/426368.
[edit] External links
Media related to NGC 4945 at Wikimedia Commons- APOD: Nearby Spiral Galaxy NGC 4945 (7/21/02)
- ESO: The milkyway's nearby cousin (2/10/09)
- NGC4945
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