| NGC 3913 | |
|---|---|
 NGC 3913 imaged byLegacy Surveys | |
| Observation data (J2000epoch) | |
| Constellation | Ursa Major |
| Right ascension | 11h 50m 38.9222s[1] |
| Declination | +55° 21′ 13.942″[1] |
| Redshift | 0.003185[1] |
| Heliocentric radial velocity | 955±1 km/s[1] |
| Distance | 27.06 ± 14.19 Mly (8.297 ± 4.352 Mpc)[1] |
| Group orcluster | NGC 3631 Group (LGG 241) |
| Apparent magnitude (V) | 12.6[1] |
| Characteristics | |
| Type | (R')SA(rs)d?[1] |
| Size | ~23,600 ly (7.24 kpc) (estimated)[1] |
| Apparent size (V) | 2.6′ × 2.6′[1] |
| Other designations | |
| HOLM 296A,IRAS 11480+5537,IC 740,UGC 6813,MCG +09-20-001,PGC 37024,CGCG 268-092[1] | |
NGC 3913 is aspiral galaxy in theconstellation ofUrsa Major. Its velocity with respect to thecosmic microwave background for is1,124±12 km/s, which corresponds to aHubble distance of 54.1 ± 3.8 Mly (16.58 ± 1.17 Mpc).[1] However, threenon redshift measurements give a much closer distance of 27.06 ± 14.19 Mly (8.297 ± 4.352 Mpc).[2] It was discovered by German-British astronomerWilliam Herschel on 14 April 1785.[3] It was also observed byLewis Swift on 8 May 1890, which resulted in the galaxy also being listed in theIndex Catalogue asIC 740.[3]
TheSIMBAD database lists NGC 3913 as anActive 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.[4]
According to A.M. Garcia, NGC 3913 is part of the NGC 3631 group (also known asLGG 241). This group includes at least 10 galaxies, includingNGC 3631,NGC 3657,NGC 3718,NGC 3729,NGC 3972,NGC 3998, UGC 6251, UGC 6446, and UGC 6816.[5]
NGC 3631 is also a member of theM109 Group.
Twosupernovae have been observed in NGC 3913:
Media related toNGC 3913 at Wikimedia Commons
