IC 647
| Galaxy IC 647 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | Water snake |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 10 h 50 m 34.5 s |
| declination | -12 ° 51 ′ 17 ″ |
| Appearance | |
| Morphological type | E3 |
| Brightness (visual) | 15.0 mag |
| Brightness (B-band) | 16.0 mag |
| Angular expansion | 0.3 ′ × 0.2 ′ |
| Position angle | 80 ° |
| Surface brightness | 12.0 mag / arcmin² |
| Physical data | |
| Redshift | 0.014870 ± 0.000150 |
| Radial velocity | 4458 ± 45 km / s |
|
Stroke distance v rad / H 0 |
(191 ± 14) · 10 6 ly (58.7 ± 4.2) Mpc |
| history | |
| discovery | Stéphane Javelle |
| Discovery date | April 21, 1892 |
| Catalog names | |
| IC 647 • PGC 946616 • 2MASX J10503444-1251152 • GALEX ASC J105034.48-125116.4 | |
IC 647 is an elliptical dwarf galaxy of the Hubble type E3 in the constellation Hydra south of the ecliptic . It is estimated to be 191 million light years from the Milky Way and about 15,000 light years across .
The galaxies NGC 3402 , NGC 3404 , NGC 3421 , NGC 3422 are located in the same area of the sky .
The object was discovered by Stéphane Javelle on April 21, 1892 .
Web links
Individual evidence