NGC 4945

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: 13^h 05^m 27.5^s, −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]

The spiral galaxy NGC 4945, a close neighbour of the Milky Way.

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]

References

1. ^ ^{a b c d e f g} "NASA/IPAC Extragalactic Database". Results for NGC 4945. http://nedwww.ipac.caltech.edu/. Retrieved 2006-11-25. 
2. ^ ^{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. 
3. ^ http://www.sciencedaily.com/releases/2009/09/090902112111.htm
4. ^ 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. 

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