NGC 3780
| NGC 3780 | |
|---|---|
NGC 3780 imaged by SDSS | |
| Observation data (J2000 epoch) | |
| Constellation | Ursa Major |
| Right ascension | 11h 39m 22.3603s |
| Declination | +56° 16′ 14.452″ |
| Redshift | 0.007976±0.00000667 |
| Heliocentric radial velocity | 2,391±2 km/s |
| Distance | 109.65 ± 9.10 Mly (33.620 ± 2.789 Mpc) |
| Group or cluster | NGC 3780 group (LGG 247) |
| Apparent magnitude (V) | 12.16 |
| Characteristics | |
| Type | SA(s)c |
| Size | ~98,900 ly (30.32 kpc) (estimated) |
| Apparent size (V) | 3.1′ × 2.5′ |
| Other designations | |
| IRAS 11366+5632, UGC 6615, MCG +09-19-150, PGC 36138, CGCG 292-014 | |
NGC 3780 is a spiral galaxy in the constellation of Ursa Major. Its velocity with respect to the cosmic microwave background is 2,557±12 km/s, which corresponds to a Hubble distance of 123.0 ± 8.6 Mly (37.71 ± 2.65 Mpc). However, 10 non-redshift measurements give a closer mean distance of 109.65 ± 9.10 Mly (33.620 ± 2.789 Mpc). It was discovered by German-British astronomer William Herschel on 14 April 1789.
NGC 3780 is a is a LINER galaxy, i.e. a galaxy whose nucleus has an emission spectrum characterized by broad lines of weakly ionized atoms. It also has an active galaxy nucleus, i.e. it has a compact region at the center of a galaxy that emits a significant amount of energy across the electromagnetic spectrum, with characteristics indicating that this luminosity is not produced by the stars.