NGC 4556
| NGC 4556 | |
|---|---|
 SDSS image of NGC 4556. | |
| Observation data (J2000 epoch) | |
| Constellation | Coma Berenices |
| Right ascension | 12h 35m 45.8s[1] |
| Declination | 26° 54′ 32″[1] |
| Redshift | 0.024764[1] |
| Heliocentric radial velocity | 7424 km/s[1] |
| Distance | 340 Mly (105 Mpc) |
| Apparent magnitude (V) | 13.8[1] |
| Absolute magnitude (B) | -22.89[1] |
| Characteristics | |
| Type | cD, E+[1] |
| Size | ~167,500 ly (51.36 kpc) (estimated)[1] |
| Apparent size (V) | 1.35′ × 0.93′[1] |
| Other designations | |
| UGC 07765, CGCG 159-022, MCG +05-30-027, PGC 041980[1] | |
NGC 4556 is an elliptical galaxy and a cD galaxy located 340 million light-years away[2] in the constellation Coma Berenices. It was discovered on April 11, 1785, by astronomer William Herschel.[3] NGC 4556 is a member of a group of 12 galaxies known as [T2015] nest 100082, or the NGC 4555 Group,[4] and is part of the Coma Supercluster.[5][6]
NGC 4556 is host to a supermassive black hole with an estimated mass of 1.1 × 109 M☉.[7]
See also
[edit]References
[edit]- ^ a b c d e f g h i j "Results for object NGC 4556". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 2025-07-18.
- ^ "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2025-07-18.
- ^ "New General Catalog Objects: NGC 4550 - 4599". cseligman.com. Retrieved 2025-07-18.
- ^ Tully, R. Brent (May 2015). "Galaxy Groups: A 2MASS Catalog". The Astronomical Journal. 149 (5): 171. arXiv:1503.03134. doi:10.1088/0004-6256/149/5/171. ISSN 0004-6256.
- ^ Gregory, S. A.; Thompson, L. A. (June 1978). "The Coma/A1367 supercluster and its environs". The Astrophysical Journal. 222: 784. doi:10.1086/156198. ISSN 0004-637X.
- ^ Jaffe, W.; Gavazzi, G. (February 1986). "Radio continuum survey of the coma/A1367 supercluster. II. 1.5 GHz observations of 396 CGCG galaxies". The Astronomical Journal. 91: 204–216. doi:10.1086/114001. ISSN 0004-6256.
- ^ Arzoumanian, Zaven; Baker, Paul T.; Brazier, Adam; Brook, Paul R.; Burke-Spolaor, Sarah; Becsy, Bence; Charisi, Maria; Chatterjee, Shami; Cordes, James M.; Cornish, Neil J.; Crawford, Fronefield; Cromartie, H. Thankful; Decesar, Megan E.; Demorest, Paul B.; Dolch, Timothy (2021-06-01). "The NANOGrav 11 yr Data Set: Limits on Supermassive Black Hole Binaries in Galaxies within 500 Mpc". The Astrophysical Journal. 914 (2): 121. arXiv:2101.02716. Bibcode:2021ApJ...914..121A. doi:10.3847/1538-4357/abfcd3. ISSN 0004-637X.