NGC 4491
Galaxy in the constellation of Virgo
From Wikipedia, the free encyclopedia
NGC 4491 is a dwarf barred spiral galaxy[2] located about 55 million light-years away[3] in the constellation Virgo.[4] NGC 4491 was discovered by astronomer William Herschel on March 15, 1784.[5] NGC 4491 is located in a subgroup of the Virgo Cluster centered on Messier 87 known as the Virgo A subgroup.[2]
Right ascension12h 30m 57.1s[1]
Declination11° 29′ 01″[1]
| NGC 4491 | |
|---|---|
SDSS image of NGC 4491. | |
| Observation data (J2000 epoch) | |
| Constellation | Virgo |
| Right ascension | 12h 30m 57.1s[1] |
| Declination | 11° 29′ 01″[1] |
| Redshift | 0.001658/497 km/s[1] |
| Distance | 55,420,000 ly[2] |
| Group or cluster | Virgo Cluster |
| Apparent magnitude (V) | 13.5[1] |
| Characteristics | |
| Type | SB(s)a[1] |
| Size | ~7,140 ly (estimated)[1] |
| Apparent size (V) | 1.7 x 0.9[1] |
| Other designations | |
| PGC 41376, UGC 7657, VCC 1326[1] | |
Tidal interactions
NGC 4491 is a strongly barred galaxy. The bar may have grown from the tidal influence of other galaxies in the Virgo Cluster.[2]
