| NGC 4540 | |
|---|---|
 Hubble Space Telescope image of NGC 4540. | |
| Observation data (J2000 epoch) | |
| Constellation | Coma Berenices |
| Right ascension | 12h 34m 50.9s [1] |
| Declination | 15° 33′ 06″ [1] |
| Redshift | 0.004306 [1] |
| Heliocentric radial velocity | 1291 km/s [1] |
| Distance | 64 Mly [2] |
| Group or cluster | Virgo Cluster |
| Apparent magnitude (V) | 12.44 [1] |
| Characteristics | |
| Type | SAB(rs)cd, Sy1 [1] |
| Size | ~39,120 ly (estimated) [1] |
| Apparent size (V) | 1.9 x 1.5 [1] |
| Other designations | |
| PGC 41876, UGC 7742, IRAS 12323+1549, MCG 3-32-74, CGCG 99-93, VCC 1588 [1] | |
NGC 4540 is a spiral galaxy with type 1 Seyfert activity [3] located about 64 million light-years away [4] in the constellation Coma Berenices. [5] NGC 4540 was discovered by astronomer William Herschel on March 21, 1784 [6] and is a member of the Virgo Cluster. [7] [8]
