NGC 921
| Galaxy NGC 921 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | whale |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 02 h 26 m 33.4 s |
| declination | -15 ° 50 ′ 51 ″ |
| Appearance | |
| Morphological type | SB (r) c? |
| Brightness (visual) | 14.3 mag |
| Brightness (B-band) | 15.0 mag |
| Angular expansion | 1.4 ′ × 0.6 ′ |
| Position angle | 84 ° |
| Surface brightness | 14.0 mag / arcmin² |
| Physical data | |
| Redshift | 0.022859 ± 0.000073 |
| Radial velocity | 6853 ± 22 km / s |
|
Stroke distance v rad / H 0 |
(305 ± 22) · 10 6 ly (93.5 ± 6.6) Mpc |
| history | |
| discovery | Ormond Stone |
| Discovery date | January 6, 1886 |
| Catalog names | |
| NGC 921 • PGC 9287 • MCG -03-07-015 • 2MASX 02263343-1550511 • GALEXASC J022633.42-155049.7 | |
NGC 921 is a spiral galaxy of Hubble type Sc in the constellation Cetus south of the ecliptic . It is estimated to be 305 million light years from the Milky Way and about 125,000 light years in diameter.
The object was discovered by Ormond Stone on January 6, 1886 .