NGC 4691
| NGC 4691 | |
|---|---|
NGC 4691 imaged by the Schulman 0.8m Telescope at Mount Lemmon Observatory | |
| Observation data (J2000 epoch) | |
| Constellation | Virgo |
| Right ascension | 12h 48m 13.5998s |
| Declination | −03° 19′ 57.734″ |
| Redshift | 0.003736 ± 0.000007 |
| Heliocentric radial velocity | 1,120 ± 2 km/s |
| Distance | 69.5 ± 4.4 Mly (21.3 ± 1.3 Mpc) |
| Group or cluster | NGC 4753 Group |
| Apparent magnitude (V) | 11.1 |
| Characteristics | |
| Type | (R)SB(s)0/a pec |
| Size | ~67,300 ly (20.63 kpc) (estimated) |
| Apparent size (V) | 2.52′ × 1.46′ |
| Other designations | |
| IRAS 12456-0303, UGCA 299, MCG +00-33-013, PGC 43238, CGCG 015-023 | |
NGC 4691 is a barred spiral galaxy in the constellation Virgo. The galaxy lies about 70 million light years away from Earth, which means, given its apparent dimensions, that NGC 4691 is approximately 60,000 light years across. It was discovered by German-British astronomer William Herschel on 17 April 1784.