NGC 6145
Galaxy in the constellation Hercules
From Wikipedia, the free encyclopedia
NGC 6145 is a spiral galaxy in the constellation of Hercules. Its velocity with respect to the cosmic microwave background is 8,622±4 km/s, which corresponds to a Hubble distance of 414.8 ± 29.0 Mly (127.17 ± 8.90 Mpc).[1] Additionally, one non-redshift measurement gives a farther distance of 460 Mly (140 Mpc).[2] It was discovered by British astronomer John Herschel on 12 May 1828.[3]
| NGC 6145 | |
|---|---|
NGC 6145 imaged by SDSS | |
| Observation data (J2000 epoch) | |
| Constellation | Hercules |
| Right ascension | 16h 25m 02.3795s[1] |
| Declination | +40° 56′ 47.926″[1] |
| Redshift | 0.028671±0.0000105[1] |
| Heliocentric radial velocity | 8,595±3 km/s[1] |
| Distance | 414.8 ± 29.0 Mly (127.17 ± 8.90 Mpc)[1] |
| Group or cluster | Abell 2199 |
| Apparent magnitude (V) | 14.5g[1] |
| Characteristics | |
| Type | Sb[1] |
| Size | ~149,000 ly (45.68 kpc) (estimated)[1] |
| Apparent size (V) | 0.98′ × 0.5′[1] |
| Other designations | |
| HOLM 747A, 2MASX J16250238+4056478, MCG +07-34-021, PGC 58074, CGCG 224-017[1] | |
NGC 6145 is a LINER galaxy, i.e. a galaxy whose nucleus has an emission spectrum characterized by broad lines of weakly ionized atoms.[4][5]
Galaxy group and cluster
NGC 6145 and NGC 6147 are listed together as Holm 747 in Erik Holmberg's A Study of Double and Multiple Galaxies Together with Inquiries into some General Metagalactic Problems, published in 1937.[6] NGC 6145 is also part of the galaxy cluster known as Abell 2199.[7]
