NGC 4720
| Galaxy NGC 4720 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | Virgin |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 12 h 50 m 42.7 s |
| declination | -04 ° 09 ′ 21 ″ |
| Appearance | |
| Morphological type | S0-? |
| Brightness (visual) | 13.3 mag |
| Brightness (B-band) | 14.3 mag |
| Angular expansion | 0.9 ′ × 0.5 ′ |
| Position angle | 123 ° |
| Surface brightness | 12.5 mag / arcmin² |
| Physical data | |
| Redshift | 0.005017 +/- 0.000020 |
| Radial velocity | 1504 +/- 6 km / s |
|
Stroke distance v rad / H 0 |
(63 ± 5) · 10 6 ly (19.3 ± 1.4) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | February 22, 1787 |
| Catalog names | |
| NGC 4720 • PGC 43478 • MCG -01-33-024 • IRAS 12481-0352 • GC 3248 • H III 611 • h 1447 • LDCE 0904 NED260 | |
NGC 4720 is a 13.3 likes bright galaxy from the Hubble type e-S0 in the constellation of Virgo , which is about 63 million light-years from the Milky Way's center.
It was discovered on February 2, 1787 by Wilhelm Herschel with an 18.7-inch reflector telescope, who described it as "vF, S, no time to verify". In the notes to his catalog one reads for a second observation "Verified in Sweep 709, March 11, 1787, 'vF, vS, lE, easily resolvable, may be only a few vF stars ...'"