NGC 5172
Galaxy in the constellation Coma Berenices
From Wikipedia, the free encyclopedia
NGC 5172 is an intermediate spiral galaxy in the constellation of Coma Berenices. Its velocity with respect to the cosmic microwave background is 4,308±19 km/s, which corresponds to a Hubble distance of 207.2 ± 14.5 Mly (63.53 ± 4.46 Mpc).[1] However, 13 non-redshift measurements give a closer mean distance of 164.63 ± 11.65 Mly (50.477 ± 3.572 Mpc).[2] It was discovered by British astronomer John Herschel on 7 May 1826.[3]
| NGC 5172 | |
|---|---|
NGC 5172 imaged by SDSS | |
| Observation data (J2000 epoch) | |
| Constellation | Coma Berenices |
| Right ascension | 12h 29m 19.3104s[1] |
| Declination | +17° 03′ 06.901″[1] |
| Redshift | 0.013443±0.00000300[1] |
| Heliocentric radial velocity | 4,030±1 km/s[1] |
| Distance | 164.63 ± 11.65 Mly (50.477 ± 3.572 Mpc)[1] |
| Apparent magnitude (V) | 12.63[1] |
| Characteristics | |
| Type | SAB(rs)bc[1] |
| Size | ~167,600 ly (51.39 kpc) (estimated)[1] |
| Apparent size (V) | 3.3′ × 1.7′[1] |
| Other designations | |
| IRAS 13268+1718, 2MASX J13291914+1703061, UGC 8477, MCG +03-34-041, PGC 47330, CGCG 101-057[1] | |
NGC 5172 has a possible active galactic 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.[4][5]
According to Abraham Mahtessian, NGC 5172 and NGC 5190 form a pair of galaxies.[6]
Supernovae
Two supernovae have been observed in NGC 5172:
- SN 1998cc (Type Ib, mag. 18.1) was discovered by the Lick Observatory Supernova Search (LOSS) on 15 May 1998.[7][8]
- SN 2001R (Type II, mag. 18.5) was discovered by LOTOSS (Lick Observatory and Tenagra Observatory Supernova Searches) on 6 January 2001.[9][10]
