| NGC 4564 | |
|---|---|
|   NGC 4564 imaged by Sloan Digital Sky Survey   | |
| Observation data (J2000 epoch) | |
| Constellation | Virgo | 
| Right ascension | 12h 36m 26.9913s [1] | 
| Declination | +11° 26′ 21.266″ [1] | 
| Redshift | 0.003809 [1] | 
| Heliocentric radial velocity | 1142 km/s [1] | 
| Distance | 57.2 Mly (17.55 Mpc) [1] | 
| Group or cluster | Virgo Cluster | 
| Apparent magnitude (V) | 12.05 [1] | 
| Characteristics | |
| Type | E6 [1] | 
| Size | ~63,200 ly (19.38 kpc) (estimated) [1] | 
| Apparent size (V) | 3.5′ × 1.5′ [1] | 
| Other designations | |
| VCC 1664, UGC 7773, MCG +02-32-150, PGC 42051, CGCG 070-186 [1] | |
NGC 4564 is an elliptical galaxy located about 57 million light-years away [2] in the constellation Virgo. [3] NGC 4564 was discovered by astronomer William Herschel on March 15, 1784. [4] [5] The galaxy is also a member of the Virgo Cluster. [6] [7]
NGC 4564 has an estimated population of 213 ± 31 globular clusters. [8]  It is the host of a supermassive black hole with an estimated mass of about 56 million suns (0.56+0.03
−0.08×108  M☉ ). [9] 
One supernova has been observed in NGC 4564: SN 1961H (type unknown, mag. 11.2) was discovered by Italian amateur astronomer Giuliano Romano on 2 May 1961. [10] [11] A spectrum taken indicated that it was probably of Type I. [10]