IC 4947
| Galaxy IC 4947 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | telescope |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 20 h 07 m 31.7 s |
| declination | -53 ° 08 ′ 33 ″ |
| Appearance | |
| Morphological type | E + 1 |
| Brightness (visual) | 14.1 mag |
| Brightness (B-band) | 15.1 mag |
| Angular expansion | 0.80 'x 0.6' |
| Position angle | 84 ° |
| Surface brightness | 13.4 mag / arcmin² |
| Physical data | |
| Redshift | 0.046862 ± 0.000123 |
| Radial velocity | 14,049 ± 37 km / s |
|
Stroke distance v rad / H 0 |
(626 ± 44) · 10 6 Lj (191.8 ± 13.4) Mpc |
| history | |
| discovery | Royal H. Frost |
| Discovery date | August 31, 1904 |
| Catalog names | |
| IC 4947 • PGC 64138 • ESO 185-069 • 2MASX J20073177-5308329 • SGC 200342-5317.2 • GALEX ASC J200731.46-530833.1 • 2MASS J20073173-5308327 | |
IC 4947 is a cD galaxy of the Hubble type E3 in the constellation Telescopium in the southern sky . It is estimated to be 626 million light years from the Milky Way and about 150,000 light years in diameter.
In the same area of the sky are u. a. the galaxies IC 4941 , IC 4942 , IC 4961 .
The object was discovered by Royal Harwood Frost on August 31, 1904 .