| NGC 4331 | |
|---|---|
 Image of NGC 4331 byPanSTARRS. | |
| Observation data (J2000epoch) | |
| Constellation | Draco |
| Right ascension | 12h 22m 35.9s[1] |
| Declination | 76° 10′ 21″[1] |
| Redshift | 0.005234[1] |
| Heliocentric radial velocity | 1569 km/s[1] |
| Distance | 73.8 Mly (22.63 Mpc)[1] |
| Group orcluster | NGC 4291 Group |
| Apparent magnitude (V) | 14.64[1] |
| Characteristics | |
| Type | Im?[1] |
| Size | ~48,100 ly (14.74 kpc) (estimated)[1] |
| Apparent size (V) | 2.2 x 0.4[1] |
| Other designations | |
| UGC 07449, PGC 040085, MCG +13-09-026, VII Zw 451[1] | |
NGC 4331 is anirregular galaxy located 74 millionlight-years away[2] in theconstellationDraco. The galaxy was discovered by astronomerWilliam Herschel on December 12, 1797.[3] The galaxy is host to ablack hole with an estimated mass of 4.6×105solar masses.[4]
NGC 4331 is a member of theNGC 4291 Group, which also contains the active galaxyNGC 4319[5][6][7][8] and is an X-ray bright member of the group.[9] The NGC 4291 Group is located within theCanes Venatici-Camelopardalis Cloud,[5] which lies in the First Upper Plane of theVirgo Supercluster.[6]
