NGC 3811
| NGC 3811 | |
|---|---|
NGC 3811 imaged by SDSS | |
| Observation data (J2000 epoch) | |
| Constellation | Ursa Major |
| Right ascension | 11h 41m 16.6161s |
| Declination | +47° 41′ 26.887″ |
| Redshift | 0.010294±0.000009 |
| Heliocentric radial velocity | 3,086±3 km/s |
| Distance | 152.10 ± 12.53 Mly (46.633 ± 3.843 Mpc) |
| Apparent magnitude (V) | 12.9 |
| Characteristics | |
| Type | SB(r)cd |
| Size | ~110,600 ly (33.91 kpc) (estimated) |
| Apparent size (V) | 2.2′ × 1.7′ |
| Other designations | |
| IRAS 11386+4758, UGC 6650, MCG +08-21-091, Mrk 185, PGC 36265, CGCG 242-074 | |
NGC 3811 is a barred spiral galaxy in the constellation of Ursa Major. Its velocity with respect to the cosmic microwave background is 3,299±15 km/s, which corresponds to a Hubble distance of 158.7 ± 11.1 Mly (48.65 ± 3.41 Mpc). Additionally, 12 non-redshift measurements give a similar mean distance of 152.10 ± 12.53 Mly (46.633 ± 3.843 Mpc). It was discovered by German-British astronomer William Herschel on 9 February 1788.
NGC 3811 is a starburst galaxy. It is also a galaxy whose nucleus shines in the ultraviolet range, and is thus listed in the Markarian catalogue as Mrk 185.