NGC 5631
| Galaxy NGC 5631 |
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|---|---|
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| SDSS recording | |
| AladinLite | |
| Constellation | Big Bear |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 14 h 26 m 33.3 s |
| declination | + 56 ° 34 ′ 57 ″ |
| Appearance | |
| Morphological type | SA (s) 0 ^ 0 ^ / Sy2 |
| Brightness (visual) | 11.4 mag |
| Brightness (B-band) | 12.4 mag |
| Angular expansion | 1.7 ′ × 1.7 ′ |
| Surface brightness | 12.4 mag / arcmin² |
| Physical data | |
| Redshift | 0.006484 +/- 0.000017 |
| Radial velocity | 1944 +/- 5 km / s |
|
Stroke distance v rad / H 0 |
(93 ± 7) · 10 6 ly (28.4 ± 2.0) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | April 17, 1789 |
| Catalog names | |
| NGC 5631 • UGC 9261 • PGC 51564 • CGCG 296-005 • MCG + 10-21-02 • IRAS F14250 + 5648 • GC 3897 • H I 236 • h 1820 • LDCE 1056 NED002 | |
NGC 5631 is a 11.4 may bright lenticular Seyfert galaxy (type 2) from the Hubble type S0 in the constellation Big Bear and about 93 million light-years away from the Milky Way.
It was discovered on April 17, 1789 by Wilhelm Herschel with an 18.7-inch reflecting telescope, who described it as "vB, S, irregularly round, bright irregularly resolvable nucleus, vgmbM".