NGC 6794
Galaxy in the constellation Sagittarius
From Wikipedia, the free encyclopedia
NGC 6794 is a large spiral galaxy in the constellation of Sagittarius. Its velocity with respect to the cosmic microwave background is 5,887±13 km/s, which corresponds to a Hubble distance of 283.2 ± 19.8 Mly (86.83 ± 6.08 Mpc).[1] However, three non-redshift measurements give a farther mean distance of 315.94 ± 1.96 Mly (96.867 ± 0.601 Mpc).[2] It was discovered by British astronomer John Herschel on 24 August 1834.[3][4]
| NGC 6794 | |
|---|---|
NGC 6794 imaged by Legacy Surveys | |
| Observation data (J2000 epoch) | |
| Constellation | Sagittarius |
| Right ascension | 19h 28m 03.8849s[1] |
| Declination | −38° 55′ 07.297″[1] |
| Redshift | 0.020077±0.0000300[1] |
| Heliocentric radial velocity | 6,019±9 km/s[1] |
| Distance | 315.94 ± 1.96 Mly (96.867 ± 0.601 Mpc)[1] |
| Group or cluster | LDC 1344 |
| Apparent magnitude (V) | 13.9[1] |
| Characteristics | |
| Type | SA(rs)ab[1] |
| Size | ~229,700 ly (70.44 kpc) (estimated)[1] |
| Apparent size (V) | 1.7′ × 1.5′[1] |
| Other designations | |
| ESO 338- G 005, 2MASX J19280388-3855077, MCG -07-40-001, PGC 63241[1] | |
NGC 6794 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.[5][6]
Galaxy group
NGC 6794 is a member of a small galaxy group known as LDC 1344, which includes the galaxies ESO 338-7 and ESO 338-9.[7][8]
