Arp 321
| Galaxy Arp 321 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | Water snake |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 09 h 38 m 54.5 s |
| declination | -04 ° 51 ′ 07 ″ |
| Appearance | |
| Brightness (visual) | 15.4 mag |
| Physical data | |
| Redshift | 0.022300 |
| Radial velocity | 6685 km / s |
|
Stroke distance v rad / H 0 |
(291 ± 21) · 10 6 ly (89.3 ± 6.3) Mpc |
| history | |
| Catalog names | |
| PGC 25708/09/13/15/16 • MCG -01-25-08 / -12 • Arp 321 • HCG 40 • VV 116 • | |
Arp 321 is an interacting group of galaxies in the Hydra constellation , an estimated 300 million light years from the Milky Way . Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This group of galaxies belongs to the class of galaxies .
| designation |
α J2000.0 |
δ J2000.0 |
Morphological type | m V | Angular expansion | Distance ( million years ) |
|---|---|---|---|---|---|---|
| MCG -01-25-08 | 09 h 38 m 53.6 s | −4 ° 51 ′ 37 ″ | SB (rs) b pec sp / HII | 15.7 | 1 ′, 1 × 0 ′, 3 | 279 |
| MCG -01-25-09 | 09 h 38 m 53.5 s | −4 ° 50 ′ 57 ″ | E1 | 13.8 | 1 ′, 3 × 1 ′, 0 | 289 |
| MCG -01-25-10 | 09 h 38 m 54.9 s | −4 ° 51 ′ 58 ″ | SA (r:) 0- pec | 15.0 | 1 ′, 1 × 0 ′, 7 | 298 |
| MCG -01-25-11 | 09 h 38 m 54.9 s | −4 ° 51 ′ 58 ″ | SAB (s:) a pec / HII? | 17.4 | 0 ′, 7 × 0 ′, 3 | 289 |
| MCG -01-25-12 | 09 h 38 m 55.8 s | −4 ° 50 ′ 14 ″ | SB (s) 0 / a pec / HII | 15.0 | 0 ′, 9 × 0 ′, 4 | 282 |
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