NGC 923
| Galaxy NGC 923 |
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|---|---|
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| NGC 923 & CGCG 539-029 | |
| AladinLite | |
| Constellation | Andromeda |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 02 h 27 m 34.6 s |
| declination | + 41 ° 58 ′ 39 ″ |
| Appearance | |
| Morphological type | Sb |
| Brightness (visual) | 13.7 mag |
| Brightness (B-band) | 14.5 mag |
| Angular expansion | 0.8 ′ × 0.6 ′ |
| Position angle | 95 ° |
| Surface brightness | 12.8 mag / arcmin² |
| Physical data | |
| Affiliation | Abell 347 |
| Redshift | 0.018853 ± 0.000023 |
| Radial velocity | 5652 ± 7 km / s |
|
Stroke distance v rad / H 0 |
(258 ± 18) x 10 6 ly (79.2 ± 5.5) Mpc |
| history | |
| discovery | Édouard Stephan |
| Discovery date | October 30, 1878 |
| Catalog names | |
| NGC 923 • UGC 1915 • PGC 9355 • CGCG 539-030 • MCG + 07-06-022 • IRAS 02244 + 4145 • 2MASX J02273463 + 4158392 • LEDA 9355 • LDCE 224 NED029 | |
NGC 923 is a spiral galaxy of Hubble type Sb in the constellation Andromeda. It is estimated to be 258 million light years away from the Milky Way and has a diameter of around 60,000 ly.
In the same area of the sky are the galaxies NGC 911 , NGC 912 , NGC 913 , NGC 914 , among others .
The object was discovered on October 30, 1878 by the French astronomer Édouard Stephan .