| NGC 4839 | |
|---|---|
 The cD galaxy NGC 4839. | |
| Observation data (J2000epoch) | |
| 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 | 350,000ly (107.36kpc) (estimated)[1] |
| Other designations | |
| 2MASX J12572435+2729517,UGC 8070,MCG -05-31-025,PGC 44298,CGCG 160-039[2] | |
NGC 4839 is alenticulartype-cD galaxy located within the richComa 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 ofglobular clusters within the galaxy supported the galaxy being on its second infall.[3]
NGC 4839 was discovered on April 11, 1785, byWilliam Herschel, but also observed byJohn Herschel on April 19, 1827, and byHeinrich d'Arrest on May 18, 1862.[4] It is classified as aradio galaxy presentingradio waves.[1]
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