Arp 121
| Galaxy Arp 121 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | whale |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 00 h 59 m 24.9 s |
| declination | -04 ° 47 ′ 55 ″ |
| Appearance | |
| Morphological type | SA0o: pec + Sa pec sp |
| Brightness (visual) | 14.5 mag |
| Physical data | |
| Redshift | 0.019250 |
| Radial velocity | 5771 km / s |
|
Stroke distance v rad / H 0 |
(261 ± 18) x 10 6 ly (79.9 ± 5.6) Mpc |
| history | |
| Catalog names | |
| PGC 3547/3553 • MCG -01-03-051 / 52 • Arp 121 • HOLM 031 | |
Arp 121 is an interacting galaxy pair in the constellation Cetus , composed of a lenticular galaxy and a spiral galaxy. Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This galaxy belongs to the class of elliptical galaxies close to and interfering with spiral galaxies .
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