NGC 3913
| NGC 3913 | |
|---|---|
NGC 3913 imaged by Legacy Surveys | |
| Observation data (J2000 epoch) | |
| Constellation | Ursa Major |
| Right ascension | 11h 50m 38.9222s |
| Declination | +55° 21′ 13.942″ |
| Redshift | 0.003185 |
| Heliocentric radial velocity | 955±1 km/s |
| Distance | 27.06 ± 14.19 Mly (8.297 ± 4.352 Mpc) |
| Group or cluster | NGC 3631 Group (LGG 241) |
| Apparent magnitude (V) | 12.6 |
| Characteristics | |
| Type | (R')SA(rs)d? |
| Size | ~23,600 ly (7.24 kpc) (estimated) |
| Apparent size (V) | 2.6′ × 2.6′ |
| Other designations | |
| HOLM 296A, IRAS 11480+5537, IC 740, UGC 6813, MCG +09-20-001, PGC 37024, CGCG 268-092 | |
NGC 3913 is a spiral galaxy in the constellation of Ursa Major. Its velocity with respect to the cosmic microwave background for is 1,124±12 km/s, which corresponds to a Hubble distance of 54.1 ± 3.8 Mly (16.58 ± 1.17 Mpc). However, three non redshift measurements give a much closer distance of 27.06 ± 14.19 Mly (8.297 ± 4.352 Mpc). It was discovered by German-British astronomer William Herschel on 14 April 1785. It was also observed by Lewis Swift on 8 May 1890, which resulted in the galaxy also being listed in the Index Catalogue as IC 740.
The SIMBAD database lists NGC 3913 as an Active Galaxy Nucleus Candidate, 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.