NGC 3891
| NGC 3891 | |
|---|---|
NGC 3891 imaged by SDSS | |
| Observation data (J2000 epoch) | |
| Constellation | Ursa Major |
| Right ascension | 11h 48m 03.3648s |
| Declination | +30° 21′ 33.621″ |
| Redshift | 0.020980±0.00000661 |
| Heliocentric radial velocity | 6,290±2 km/s |
| Distance | 330.46 ± 14.72 Mly (101.320 ± 4.514 Mpc) |
| Group or cluster | Coma Cluster |
| Apparent magnitude (V) | 13.3g |
| Characteristics | |
| Type | Sbc |
| Size | ~221,100 ly (67.79 kpc) (estimated) |
| Apparent size (V) | 1.54′ × 1.15′ |
| Other designations | |
| 2MASX J11480336+3021335, UGC 6772, MCG +05-28-031, PGC 36832, CGCG 157-035 | |
NGC 3891 is a large spiral galaxy in the constellation of Ursa Major. Its velocity with respect to the cosmic microwave background is 6,581±20 km/s, which corresponds to a Hubble distance of 316.6 ± 22.2 Mly (97.06 ± 6.80 Mpc). However, 10 non-redshift measurements give a slightly farther mean distance of 330.46 ± 14.72 Mly (101.320 ± 4.514 Mpc). It was discovered by German-British astronomer William Herschel on 3 February 1788.
NGC 3891 is a LINER galaxy, i.e. a galaxy whose nucleus has an emission spectrum characterized by broad lines of weakly ionized atoms. It is also a radio galaxy, i.e. it has giant regions of radio emission extending well beyond its visible structure.
NGC 3891 is a member of the Coma cluster.