NGC 990
| Galaxy NGC 990 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | Aries |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 02 h 36 m 18.2 s |
| declination | + 11 ° 38 ′ 31 ″ |
| Appearance | |
| Morphological type | E. |
| Brightness (visual) | 12.5 mag |
| Brightness (B-band) | 13.5 likes |
| Angular expansion | 1.8 ′ × 1.5 ′ |
| Position angle | 42 ° |
| Surface brightness | 13.6 mag / arcmin² |
| Physical data | |
| Affiliation | LGG 69 |
| Redshift | 0.011701 ± 0.000070 |
| Radial velocity | 3508 ± 21 km / s |
|
Stroke distance v rad / H 0 |
(159 ± 11) · 10 6 ly (48.7 ± 3.4) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | September 21, 1786 |
| Catalog names | |
| NGC 990 • UGC 2089 • PGC 9890 • CGCG 439-019 • MCG + 02-07-018 • 2MASX J02361820 + 1138315 • GC 569 • H III 557 • h 238 • GALEX ASC J023618.22 + 113831.6 • LDCE 180 NED001 | |
NGC 990 is an elliptical galaxy from the Hubble type E2 in the constellation Widder on northern sky . It is an estimated 159 million light years away from the Milky Way and has a diameter of about 85,000 ly. Together with NGC 1012 and NGC 1029 , it forms the small NGC 1012 group ( LGG 69 ).
In the same area of the sky is u. a. the galaxy IC 1817 .
The object was discovered by the astronomer Wilhelm Herschel on September 21, 1786.