Arp 221
| Galaxy Arp 221 |
|
|---|---|
|
|
| Hubble Space Telescope | |
| AladinLite | |
| Constellation | Water snake |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 09 h 36 m 26.7 s |
| declination | -11 ° 20 ′ 08 ″ |
| Appearance | |
| Brightness (visual) | 14 likes |
| Angular expansion | 0.7 ′ × 0.6 ′ |
| Physical data | |
| Redshift | 0.017959 ± 0.000077 |
| Radial velocity | (5384 ± 23) km / s |
|
Stroke distance v rad / H 0 |
(232 ± 16) x 10 6 ly (71.2 ± 5.0) Mpc |
| history | |
| Catalog names | |
| PGC 27333 • MCG -02-25-06 • IRAS 09340-1106 • Arp 221 • | |
Arp 221 is an interacting galaxy triplet in the constellation Hydra . The galaxy triplet is about 230 million light years away 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 galaxies with amorphous spiral 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