IC 4956
| Galaxy IC 4956 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | telescope |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 20 h 11 m 31.2 s |
| declination | -45 ° 35 ′ 36 ″ |
| Appearance | |
| Morphological type | E0 |
| Brightness (visual) | 12.4 mag |
| Brightness (B-band) | 13.3 mag |
| Angular expansion | 1.70 'x 1.6' |
| Position angle | 14 ° |
| Surface brightness | 13.5 mag / arcmin² |
| Physical data | |
| Affiliation | SSRS group 35 IC 4956 group LGG 431 |
| Redshift | 0.017362 ± 0.000073 |
| Radial velocity | 5205 ± 22 km / s |
|
Stroke distance v rad / H 0 |
(232 ± 16) x 10 6 ly (71.1 ± 5.0) Mpc |
| history | |
| discovery | Lewis Swift |
| Discovery date | July 22, 1897 |
| Catalog names | |
| IC 4956 • PGC 64230 • ESO 284-023 • IRAS 20079-4544 • 2MASX J20113123-4535357 • SGC 200759-4544.5 • GALEX ASC J201131.08-453535.1 • LDCE 1387 NED004 | |
IC 4956 is an elliptical galaxy of the Hubble type E1 in the constellation Telescope in the southern sky . It is estimated to be 510 million light years from the Milky Way and about 75,000 light years in diameter.
Together with PGC 64314 , PGC 64383 and PGC 64389 it forms the IC 4956 group .
The object was discovered by Lewis Swift on July 22, 1897 .