Q754715
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Key facts
- Constellation
- Coma Berenices
- Right ascension
- 13 00 08.1
- Declination
- +27 ° 58 ′ 37 ″
- Redshift
- 0.021 502 ± 0.000 010
- Heliocentric radial velocity
- 6495 ± 13 km/s
- Galactocentric velocity
- 6509 ± 13 km/s
- Type
- cD; E4; Dd
- Size
- 86.976 to 90.9 kpc (283,680 to 296,480 ly ), ( diameter; D 25.0 B-band and 2MASS K-band total isophotes )
- Apparent size v
- 2.9 × 1.9 moa
via Wikipedia infobox
Wikidata facts
- Distance from Earth
- 83.06
- Image
- Ssc2007-10a1.jpg
Show 9 more facts
- catalog code
- [DFO95] 261
- redshift
- 0.02150
- Commons category
- NGC 4889
- time of discovery or invention
- 1785-04-11
- apparent magnitude
- 14.385
- galaxy morphological type
- E
- right ascension
- 195.0337375
- declination
- 27.9770250
- radial velocity
- 6376
Sources (2)
via Wikidata · CC0
~9 min read
Article
NGC 4889 (also known as Caldwell 35) is an E4 supergiant elliptical galaxy. It was discovered in 1785 by the British astronomer Frederick William Herschel I, who catalogued it as a bright, nebulous patch. The brightest galaxy within the northern Coma Cluster, it is located at a median distance of 94 million parsecs (308 million light years) from Earth. At the core of the galaxy is a supermassive black hole that heats the intracluster medium through the action of friction from infalling gases and dust. The gamma ray bursts from the galaxy extend out to several million light-years from the cluster.
As with other similar elliptical galaxies, only a fraction of the mass of NGC 4889 is in the form of stars. They have a flattened, unequal distribution that bulges within its edge. Between the stars is a dense interstellar medium full of heavy elements emitted by evolved stars. The diffuse stellar halo extends out to one million light-years in diameter. Orbiting the galaxy is a very large population of globular clusters. NGC 4889 is also a strong source of soft X-ray, ultraviolet, and radio frequency radiation.