NGC 470
| Galaxy NGC 470 |
|
|---|---|
|
|
| NGC 470 (bottom right) and NGC 474 , imaged with the Very Large Telescope | |
| AladinLite | |
| Constellation | fishes |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 01 h 19 m 44.8 s |
| declination | + 03 ° 24 ′ 36 ″ |
| Appearance | |
| Morphological type | SA (rs) b / HII |
| Brightness (visual) | 11.7 mag |
| Brightness (B-band) | 12.5 mag |
| Angular expansion | 2.9 ′ × 1.7 ′ |
| Position angle | 155 ° |
| Surface brightness | 13.3 mag / arcmin² |
| Physical data | |
| Affiliation | Abell 227 NGC 470 group NGC 488 group LGG 20 |
| Redshift | 0.007919 ± 0.000010 |
| Radial velocity | 2365 ± 3 km / s |
|
Stroke distance v rad / H 0 |
(109 ± 8) · 10 6 ly (33.5 ± 2.3) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | December 13, 1784 |
| Catalog names | |
| NGC 470 • UGC 858 • PGC 4777 • CGCG 385-070 • MCG + 00-04-084 • IRAS 01171 + 0308 • 2MASX J01194484 + 0324358 • Arp 227 • GC 264 • H III 250 • HIPASS J0119 + 03 • LDCE 85 NED001 • KTG 5B | |
NGC 470 is a spiral galaxy with extensive star formation regions of the Hubble type Sb in the constellation Pisces on the ecliptic . It is an estimated 109 million light-years from the Milky Way and about 90,000 light-years across. Together with NGC 474 it forms the gravitationally bound galaxy pair Arp 227 together with NGC 467 the galaxy trio KTG 5 and the center of the galaxy group Abell 227 .
Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This galaxy belongs to the class galaxies with concentric rings .
In the same area of the sky are u. a. the galaxies NGC 462 , NGC 467, NGC 474 , IC 91 .
The object was discovered on December 13, 1784 by the German-British astronomer Friedrich Wilhelm Herschel .
NGC 470 group ( LGG 20 )
| Galaxy | Alternative name | Distance / million Lj |
|---|---|---|
| NGC 470 | PGC 4777 | 109 |
| NGC 474 | PGC 2844 | 107 |
| NGC 520 | PGC 4801 | 105 |
| PGC 5208 | UGC 957 | 99 |
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
Web links
- SIMBAD Astronomical Database
- Galaxy NGC 474: Cosmic Mixer - Astronomy Picture of the Day from October 8, 2007.
- Spektrum.de : Amateur recordings with NGC 474 [1] [2] [3]
- ARP ATLAS OF PECULIAR GALAXIES
- Seligman Arp
![[1]](http://www.spektrum.de/fm/1027/NGC474_LRGB.jpg){kind=link}