| NGC 7691 | |
|---|---|
 NGC 7691 imaged bySDSS | |
| Observation data (J2000epoch) | |
| Constellation | Pegasus |
| Right ascension | 23h 32m 24.4185s[1] |
| Declination | +15° 50′ 52.392″[1] |
| Redshift | 0.013479±0.00000300[1] |
| Heliocentric radial velocity | 4,041±1 km/s[1] |
| Distance | 199.44 ± 9.12 Mly (61.150 ± 2.796 Mpc)[1] |
| Group orcluster | NGC 7711 group (LGG 477) |
| Apparent magnitude (V) | 13.9g[1] |
| Characteristics | |
| Type | SAB(rs)bc[1] |
| Size | ~153,200 ly (46.96 kpc) (estimated)[1] |
| Apparent size (V) | 1.67′ × 1.25′[1] |
| Other designations | |
| IRAS 23299+1534,2MASX J23322441+1550520,UGC 12654,MCG +03-60-001,PGC 71699,CGCG 455-009[1] | |
NGC 7691 is anintermediate spiral galaxy in theconstellation ofPegasus. Its velocity with respect to thecosmic microwave background is3,676±26 km/s, which corresponds to aHubble distance of 176.8 ± 12.4 Mly (54.21 ± 3.81 Mpc).[1] However, fournon-redshift measurements give a farther mean distance of 199.44 ± 9.12 Mly (61.150 ± 2.796 Mpc).[2] It was discovered by German-British astronomerWilliam Herschel on 16 October 1784.[3][4]
NGC 7691 is part of the NGC 7711 group (also known asLGG 477). Thisgalaxy group contains seven members, includingNGC 7711,NGC 7722,UGC 12633,UGC 12640,UGC 12653, andUGC 12673.[5][6]
Onesupernova has been observed in NGC 7691:
Media related toNGC 7691 at Wikimedia Commons
