NGC 1228
| Galaxy NGC 1228 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | Eridanus |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 03 h 08 m 11.7 s |
| declination | -22 ° 55 ′ 22 ″ |
| Appearance | |
| Morphological type | (R ') SB (rs) 0 + |
| Brightness (visual) | 13.3 mag |
| Brightness (B-band) | 14.2 mag |
| Angular expansion | 1.6 ′ × 0.9 ′ |
| Position angle | 77 ° |
| Surface brightness | 13.5 mag / arcmin² |
| Physical data | |
| Redshift | 0.034514 ± 0.000120 |
| Radial velocity | (10347 ± 36) km / s |
|
Stroke distance v rad / H 0 |
(459 ± 32) · 10 6 ly (140.7 ± 9.9) Mpc |
| history | |
| discovery | Francis Leavenworth |
| Discovery date | 1886 |
| Catalog names | |
| NGC 1228 • PGC 11735 • ESO 480-032 • MCG -04-08-026 • 2MASX J03081175-2255223 • SGC 030558-2306.9 • Arp 332 NED03 • VV 337a • GALEX ASC J030811.92-225520.6 | |
NGC 1228 is a special lens-shaped galaxy ( ring galaxy ) of the Hubble type SB0 / a in the constellation Eridanus in the southern sky . It is an estimated 459 million light years away from the Milky Way and has a diameter of about 220,000 ly. Together with NGC 1229 , NGC 1230 and IC 1892 , it forms the chain of galaxies Arp 332 . Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This group of galaxies belongs to the class chains of galaxies .
The property was discovered by Francis Leavenworth in 1886 .
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