IC 257
| Galaxy IC 256 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | Perseus |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 02 h 49 m 45.4 s |
| declination | + 46 ° 58 ′ 34 ″ |
| Appearance | |
| Morphological type | S0-: |
| Brightness (visual) | 12.1 mag |
| Brightness (B-band) | 13.1 mag |
| Angular expansion | 1.4 ′ × 0.8 ′ |
| Position angle | 155 ° |
| Surface brightness | 12.3 mag / arcmin² |
| Physical data | |
| Redshift | 0.025895 ± 0.000057 |
| Radial velocity | 7763 ± 17 km / s |
|
Stroke distance v rad / H 0 |
(353 ± 25) x 10 6 ly (108.1 ± 7.6) Mpc |
| history | |
| discovery | Lewis Swift |
| Discovery date | September 6, 1888 |
| Catalog names | |
| IC 256 • UGC 2298 • PGC 10729 • CGCG 554-008 • MCG + 08-06-11 • | |
IC 257 is a lenticular galaxy of the Hubble type E / S0 in the constellation Perseus in the northern sky . It is estimated to be 353 million light years from the Milky Way . The latest research suggests that the galaxy observed is PGC 10737 .
The object was discovered by Lewis A. Swift on September 6, 1888 .