NGC 6331
| Galaxy NGC 6331 |
|
|---|---|
|
|
| SDSS recording | |
| AladinLite | |
| Constellation | Little Bear |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 17 h 03 m 36.0 s |
| declination | + 78 ° 37 ′ 44 ″ |
| Appearance | |
| Morphological type | E3 |
| Brightness (visual) | 14.4 mag |
| Brightness (B-band) | 15.4 mag |
| Angular expansion | 0.6 ′ × 0.4 ′ |
| Position angle | 126 ° |
| Surface brightness | 12.9 mag / arcmin² |
| Physical data | |
| Affiliation | Abell 2256 |
| Redshift | 0.053614 +/- 0.000150 |
| Radial velocity | 16073 +/- 45 km / s |
|
Stroke distance v rad / H 0 |
(726 ± 51) · 10 6 ly (222.7 ± 15.6) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | December 20, 1797 |
| Catalog names | |
| NGC 6331 • PGC 59513 • CGCG 355-024 • MCG + 13-12-015 • GC 4286 • H III 951 • | |
NGC 6331 is a 14.4 mag bright elliptical galaxy of the Hubble type E3 in the constellation Little Bear .
It was discovered on December 20, 1797 by Wilhelm Herschel with an 18.7-inch reflector telescope, who described it as "eF, S, better with 320 power".