NGC 4831
Galaxy NGC 4831 |
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AladinLite | |
Constellation | Water snake |
Position equinox : J2000.0 , epoch : J2000.0 |
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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".