| NGC 4839 | |
|---|---|
 The cD galaxy NGC 4839. | |
| Observation data (J2000 epoch) | |
| Constellation | Coma Berenices |
| Right ascension | 12h 57m 24.361s |
| Declination | +27° 29′ 52.14″ |
| Redshift | 0.02448 |
| Heliocentric radial velocity | 7913 km/s |
| Distance | 380.7 Mly (116.71 Mpc) [1] |
| Apparent magnitude (B) | 13.02 [2] |
| Characteristics | |
| Type | cD; SA0 [1] |
| Size | 350,000 ly (107.36 kpc) (estimated) [1] |
| Other designations | |
| 2MASX J12572435+2729517, UGC 8070, MCG -05-31-025, PGC 44298, CGCG 160-039 [2] | |
NGC 4839 is a lenticular type-cD galaxy located within the rich Coma Cluster of galaxies. [1] The galaxy is part of the NGC 4839 galaxy group of which it is the brightest galaxy. [3]
The NGC 4839 group appears to be merging with the Coma cluster. [3] However it is unclear if the group is on its initial infall or if it has passed through the cluster once already. [3] A 2023 paper argued that the distribution of globular clusters within the galaxy supported the galaxy being on its second infall. [3]
NGC 4839 was discovered on April 11, 1785, by William Herschel, but also observed by John Herschel on April 19, 1827, and by Heinrich d'Arrest on May 18, 1862. [4] It is classified as a radio galaxy presenting radio waves. [1]
