NGC 3990
| Galaxy NGC 3990 |
|
|---|---|
|
|
| SDSS | |
| AladinLite | |
| Constellation | Big Bear |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 11 h 57 m 35.5 s |
| declination | + 55 ° 27 ′ 31 ″ |
| Appearance | |
| Morphological type | S0-: / sp |
| Brightness (visual) | 12.6 mag |
| Brightness (B-band) | 13.4 mag |
| Angular expansion | 1.4 ′ × 0.8 ′ |
| Position angle | 40 ° |
| Surface brightness | 12.6 mag / arcmin² |
| Physical data | |
| Affiliation | Ursa major cluster |
| Redshift | 0.002322 +/- 0.000133 |
| Radial velocity | 696 +/- 40 km / s |
|
Stroke distance v rad / H 0 |
(35 ± 3) x 10 6 ly (10.63 ± 0.92) Mpc |
| history | |
| discovery | William Herschel |
| Discovery date | April 14, 1789 |
| Catalog names | |
| NGC 3990 • UGC 6938 • PGC 37618 • CGCG 269-024 • MCG + 09-20-043 • 2MASX J11573559 + 5527318 • GC 2634 • H II 791 • h 1029 • LDCE 0867 NED053 | |
NGC 3990 is an elliptical galaxy of Hubble type E / S0 in the constellation Ursa Major at the northern sky . It is estimated to be 35 million light-years from the Milky Way and about 30,000 ly in diameter. The galaxy is a member of the Ursa Major Galaxy Cluster .
In the same area of the sky are u. a. the galaxies NGC 3977 , NGC 3980 , NGC 3982 , NGC 3998 .
The object was discovered on April 14, 1789 by the German-British astronomer Wilhelm Herschel .