NGC 4889
| NGC 4889 | |
|---|---|
 Central region of the Coma cluster, with giant elliptical galaxies NGC 4889 and NGC 4874 |
|
| Observation data | |
| Constellation | Coma Berenices |
| Right ascension | 13h 00m 08.1s |
| Declination | +27° 58′ 37″ |
| Redshift | 0.021665[1] |
| Helio radial velocity | 6495 ± 13 km/s[1] |
| Distance | 308 ± 3 Mly (94.4 ± 0.8 Mpc)[2] |
| Type | E4 |
| Apparent dimensions (V) | 1′.49 × 17′.8 (3′) |
| Apparent magnitude (V) | +11.4 |
| Notable features | Brightest galaxy in the Coma Cluster |
| Other designations | |
| Caldwell 35 NGC 4884 • UGC 8110 • MCG 5-31-77 • PGC 44715 • ZWG 160.241 • DRCG 27-148[3] |
|
| See also: Galaxy, List of galaxies | |
NGC 4889, also known as Caldwell 35, is a supergiant[4] class-4 elliptical galaxy, the brightest within the Coma cluster and a Caldwell object in the constellation Coma Berenices. It shines at magnitude +11.4. Its celestial coordinates are RA 13h00.1m, DEC +27°59'. It is located near the G-class naked-eye star Beta Comae Berenices, the galaxy NGC 4874 (also in the Coma Cluster[4]), and the North Galactic Pole. It lies roughly 308 million light-years away.[2] The main cluster is retreating at roughly 7,000 kilometres per second (4,300 mi/s)[5], while NGC 4889 itself is retreating at 6,495 kilometres per second (4,036 mi/s).
As of December 2011, NGC 4889 harbors the largest directly-observed black hole to date, with a mass estimated at 21 billion solar masses (best fit; the possible range of masses is from 6 billion to 37 billion solar masses).[6]
[edit] Notes
- ^ a b "NASA/IPAC Extragalactic Database". Results for 3C 147. http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+4889&img_stamp=yes&extend=no. Retrieved 2010-05-02.
- ^ a b "Distance Results for NGC 4889". NASA/IPAC Extragalactic Database. http://nedwww.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+4889. Retrieved 2010-05-01.
- ^ Revised NGC Data for NGC 4889
- ^ a b Jacobsen, Den (2006). "Abell 1656, NGC 4889, NGC 4874". astrophoto.net. http://www.astrophoto.net/abell%201656.html. Retrieved 2008-08-09.
- ^ Block, Adam (2003-02-22). "Best of AOP: Coma Cluster (NGC 4889 and NGC 4874)". NOAO - AOP. http://www.noao.edu/outreach/aop/observers/coma.html. Retrieved 2008-08-09.
- ^ McConnell, Nicholas J. (2011-12-08). "Two ten-billion-solar-mass black holes at the centres of giant elliptical galaxies". Nature. Archived from the original on 2011-12-06. http://www.webcitation.org/63jBvENqx. Retrieved 2011-12-06.
[edit] References
- Pasachoff, Jay M. (2000). "Atlas of the Sky" (in English). Stars and Planets. New York, NY: Peterson Field Guides. ISBN 0-395-93432-X.
- Eicher, David J. (1988) (in English). The Universe from Your Backyard: A Guide to Deep-Sky Objects from Astronomy Magazine. AstroMedia (Kalmbach Publishing Company). ISBN 0-521-36299-7.
[edit] External links
- SEDS – NGC 4889
- Simbad – NGC 4889
- VizieR – NGC 4889
- NGC 4889 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- The Scale of the Universe (Astronomy Picture of the Day 2012 March 12)
|
|||||||||||
 |
This galaxy-related article is a stub. You can help Wikipedia by expanding it. |
