NGC 3389
Galaxy in the constellation Leo
From Wikipedia, the free encyclopedia
NGC 3389 is a spiral galaxy in the constellation of Leo. Its velocity with respect to the cosmic microwave background is 1,651±24 km/s, which corresponds to a Hubble distance of 79.4 ± 5.7 Mly (24.35 ± 1.74 Mpc).[1] However, 24 non-redshift measurements give a closer mean distance of 71.70 ± 3.01 Mly (21.983 ± 0.924 Mpc).[2] It was discovered by German-British astronomer William Herschel on 11 March 1784.[3] It was also observed by John Herschel on 23 March 1830, causing it to be listed a second time in the New General Catalogue as NGC 3373.[3]
| NGC 3389 | |
|---|---|
NGC 3389 imaged by SDSS | |
| Observation data (J2000 epoch) | |
| Constellation | Leo |
| Right ascension | 10h 48m 27.9204s[1] |
| Declination | +12° 31′ 59.897″[1] |
| Redshift | 0.004346±0.000007[1] |
| Heliocentric radial velocity | 1,303±2 km/s[1] |
| Distance | 71.70 ± 3.01 Mly (21.983 ± 0.924 Mpc)[1] |
| Group or cluster | HOLM 212, NGC 3338 Group (LGG 214) |
| Apparent magnitude (V) | 12.3B[1] |
| Characteristics | |
| Type | SA(s)c[1] |
| Size | ~81,000 ly (24.83 kpc) (estimated)[1] |
| Apparent size (V) | 2.8′ × 1.3′[1] |
| Other designations | |
| HOLM 212C, NGC 3373, UGC 5914, MCG +02-28-013, PGC 32306, CGCG 066-022[1] | |
Holm 212 and NGC 3338 groups
NGC 3389, Messier 105, and NGC 3384 are listed together as Holm 212 in Erik Holmberg's A Study of Double and Multiple Galaxies Together with Inquiries into some General Metagalactic Problems, published in 1937.[4]
According to A. M. Garcia, NGC 3389 is a member of the NGC 3338 Group (also known as LGG 214). In addition to NGC 3338, this galaxy group includes at least three other galaxies: NGC 3346, UGC 5832, and MRK 1263.[5]
Supernovae
Two supernovae have been observed in NGC 3389.
