IC 23
| Galaxy IC 23 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | whale |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 00 h 30 m 50.8 s |
| declination | -12 ° 43 ′ 13 ″ |
| Appearance | |
| Morphological type | E0 |
| Brightness (visual) | 14.0 mag |
| Brightness (B-band) | 15.0 mag |
| Angular expansion | 0.45 ′ × 0.45 ′ |
| Surface brightness | 13.3 mag / arcmin² |
| Physical data | |
| Redshift | 0.020471 ± 0.000070 |
| Radial velocity | 6137 ± 21 km / s km / s |
|
Stroke distance v rad / H 0 |
(277 ± 19) x 10 6 ly (84.8 ± 5.9) Mpc |
| diameter | 35,000 ly |
| history | |
| discovery | Stéphane Javelle |
| Discovery date | November 2, 1891 |
| Catalog names | |
| IC 23 • PGC 1872 • ESO 598-008 • MCG -02-02-032 • IRAS 20550-1808 • 2MASX J00305083-1243120 • GALEX ASC J003050.76-124312.5 • LDCE 22 NED003 | |
IC 23 is an elliptical galaxy from the Hubble type E0 in the constellation Cetus south of the ecliptic . It is an estimated 277 million light years away from the Milky Way and about 55,000 light years in diameter.
In the same area of the sky are u. a. the galaxies NGC 135 , IC 16 , IC 20 .
The object was discovered by Stéphane Javelle on November 2, 1891 .