| NGC 4889 | |
|---|---|
Central region of the Coma cluster, with giant elliptical galaxies NGC 4889 and NGC 4874 |
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| 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] |
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| 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]
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