NGC 946
| Galaxy NGC 946 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | Andromeda |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 02 h 30 m 38.4 s |
| declination | + 42 ° 13 ′ 57 ″ |
| Appearance | |
| Morphological type | S0: |
| Brightness (visual) | 13.7 mag |
| Brightness (B-band) | 14.7 mag |
| Angular expansion | 1.5 ′ × 1 ′ |
| Position angle | 65 ° |
| Surface brightness | 14.1 mag / arcmin² |
| Physical data | |
| Redshift | 0.019253 ± 0.000067 |
| Radial velocity | 5772 ± 20 km / s |
|
Stroke distance v rad / H 0 |
(264 ± 19) x 10 6 ly (80.8 ± 5.7) Mpc |
| history | |
| discovery | William Herschel |
| Discovery date | October 6, 1784 |
| Catalog names | |
| NGC 946 • UGC 1979 • PGC 9556 • CGCG 539-034 • MCG + 07-06-026 • 2MASX J02303850 + 4213556 • GALEX ASC J023038.49 + 421356.1 • LDCE 224 NED031 | |
NGC 946 is a lenticular galaxy of the Hubble type S0 in the constellation Andromeda in the northern sky . It is an estimated 264 million light years away from the Milky Way and about 115,000 light years in diameter.
In the same area of the sky are u. a. the galaxies NGC 923 and NGC 937 .
The Type Ia supernova SN 2016W was observed here.
The object was discovered by Wilhelm Herschel on October 6, 1784 .