NGC 4945

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

NGC 4945 is a spiral galaxy in the constellation Centaurus, and near the bright star, Zeta Centauri.[3] The galaxy was discovered by James Dunlop in 1826. It is thought to be similar to the Milky Way Galaxy, although X-ray observations show that NGC 4945 has an unusual energetic Seyfert 2 nucleus that might house a large black hole.[4]

Galaxy group

NGC 4945 one of the brightest galaxies of the Centaurus A/M83 Group, a large, nearby group of galaxies. The galaxy is the second brightest galaxy in the subgroup centered on Centaurus A.[2][5]

References

  1. ^ a b c d e f g "NASA/IPAC Extragalactic Database". Results for NGC 4945. Retrieved 2006-11-25. 
  2. ^ a b I. D. Karachentsev; M. E. Sharina; A. E. Dolphin; E. K. Grebel; et al. (2002). "New distances to galaxies in the Centaurus A group". Astronomy and Astrophysics 385 (1): 21–31.  
  3. ^ http://www.docdb.net/show_object.php?id=ngc_4945 NGC 4945 : DOCdb :Deep Sky Observer's Companion – the online database
  4. ^ "Milky Way's Not-So-Distant Cousin Likely Harbors Supermassive Black Hole". Science Daily. 
  5. ^ I. D. Karachentsev (2005). "The Local Group and Other Neighboring Galaxy Groups". Astronomical Journal 129 (1): 178–188.  

External links

  • NGC 4945 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
  • APOD: Nearby Spiral Galaxy NGC 4945 (7/21/02)
  • ESO: The milkyway's nearby cousin (2/10/09)