Arp 7
| Galaxy Arp 7 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | Water snake |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 08 h 50 m 20.2 s |
| declination | -16 ° 34 ′ 46 ″ |
| Appearance | |
| Morphological type | SB (rs) bc: / HII? |
| Brightness (visual) | 14.5 mag |
| Angular expansion | 1.3 ′ × 1 ′ |
| Physical data | |
| Redshift | 0.018356 ± 0.000027 |
| Radial velocity | (5503 ± 8) km / s |
|
Stroke distance v rad / H 0 |
(237 ± 17) · 10 6 ly (72.7 ± 5.1) Mpc |
| history | |
| Catalog names | |
| PGC 024836 • MCG -03-23-9 • IRAS 08479-1623 • Arp 7 • VV 28 • | |
Arp 7 is a bar-spiral galaxy of the Hubble type SB (rs) bc in the constellation Hydra . It is about 237 million light years from the Milky Way .
Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This galaxy belongs to the class of spiral galaxies with split arms .
Web links
literature
- Jeff Kanipe and Dennis Webb: The Arp Atlas of Peculiar Galaxies - A Chronicle and Observer's Guide , Richmond 2006, ISBN 978-0-943396-76-7