NGC 4831
| Galaxy NGC 4831 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | Water snake |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 12 h 57 m 36.7 s |
| declination | -27 ° 17 ′ 32 ″ |
| Appearance | |
| Morphological type | SAB0- |
| Brightness (visual) | 12.4 mag |
| Brightness (B-band) | 13.4 mag |
| Angular expansion | 1.7 ′ × 0.9 ′ |
| Position angle | 178 ° |
| Surface brightness | 12.7 mag / arcmin² |
| Physical data | |
| Affiliation | LGG 310 |
| Redshift | 0.011074 ± 0.000090 |
| Radial velocity | 3320 ± 27 km / s |
|
Stroke distance v rad / H 0 |
(142 ± 10) · 10 6 ly (43.5 ± 3.1) Mpc |
| history | |
| discovery | John Herschel |
| Discovery date | March 22, 1836 |
| Catalog names | |
| NGC 4831 • PGC 44340 • ESO 507-055 • MCG -04-31-010 • 2MASX J12573667-2717318 • SGC 125455-2701.3 • GC 3322 • h 3447 • GALEX ASC J125736.69-271731.8 • LDCE 924 NED016 | |
NGC 4831 is a 12.4 mag bright elliptical galaxy of the Hubble type E / SB0 in the constellation of Hydra south of the ecliptic . he is an estimated 142 million light years away from the Milky Way and has a diameter of about 75,000 light years .
The object was discovered on March 22, 1836 by John Herschel with an 18-inch reflector telescope, who described it as "F, R, gbM, 25 arcseconds".