NGC 6919
Galaxy in the constellation Microscopium
From Wikipedia, the free encyclopedia
NGC 6919 is an intermediate spiral galaxy in the constellation of Microscopium. Its velocity with respect to the cosmic microwave background is 6,458±14 km/s, which corresponds to a Hubble distance of 310.7 ± 21.8 Mly (95.25 ± 6.67 Mpc).[1] However, 12 non-redshift measurements give a closer mean distance of 246.36 ± 8.67 Mly (75.533 ± 2.658 Mpc).[2] It was discovered by British astronomer John Herschel on 2 September 1836.[3]
| NGC 6919 | |
|---|---|
NGC 6919 imaged by Legacy Surveys | |
| Observation data (J2000 epoch) | |
| Constellation | Microscopium |
| Right ascension | 20h 31m 38.0818s[1] |
| Declination | −44° 12′ 58.881″[1] |
| Redshift | 0.022109±0.0000270[1] |
| Heliocentric radial velocity | 6,628±8 km/s[1] |
| Distance | 246.36 ± 8.67 Mly (75.533 ± 2.658 Mpc)[1] |
| Group or cluster | [CHM2007] LDC 1408 |
| Apparent magnitude (V) | 13.58[1] |
| Characteristics | |
| Type | SAB(s)c[1] |
| Size | ~150,500 ly (46.14 kpc) (estimated)[1] |
| Apparent size (V) | 1.7′ × 1.2′[1] |
| Other designations | |
| ESO 285- G 027, IRAS 20282-4423, 2MASX J20313813-4412592, MCG -07-42-011, PGC 64883[1] | |
NGC 6919 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]
LDC 1408 Group
NGC 6919 is a member of a small group of galaxies known as [CHM2007] LDC 1408. The other four galaxies in the group are ESO 285-31, ESO 285-32, ESO 285-40, and ESO 285-42.[6][7]
