NGC 507
| Galaxy NGC 507 |
|
|---|---|
|
|
| SDSS image of Arp 229 (NGC 507 below and NGC 508 above) | |
| AladinLite | |
| Constellation | fishes |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 01 h 23 m 39.9 s |
| declination | + 33 ° 15 ′ 22 ″ |
| Appearance | |
| Morphological type | SA (r) 0 ^ 0 ^ / BrClG |
| Brightness (visual) | 11.3 mag |
| Brightness (B-band) | 12.3 mag |
| Angular expansion | 2.5 ′ × 2.5 ′ |
| Surface brightness | 13.4 mag / arcmin² |
| Physical data | |
| Affiliation |
NGC 507 group LGG 26 |
| Redshift | 0.016458 ± 0.000023 |
| Radial velocity | (4934 ± 7) km / s |
|
Stroke distance v rad / H 0 |
(227 ± 16) x 10 6 ly (69.6 ± 4.9) Mpc |
| history | |
| discovery | William Herschel |
| Discovery date | September 12, 1784 |
| Catalog names | |
| NGC 507 • UGC 938 • PGC 5098 • CGCG 502-067 • MCG + 05-04-044 • Arp 229 • VV 207a • GC 294 • H III 159 • h 108 • | |
NGC 507 is an elliptical galaxy of the Hubble type E / S0 on the northernmost edge of the constellation Pisces, about halfway between the star Mirach ( β Andromedae ) and the well-known triangular nebula ( M33 ). It is an estimated 227 million light years away from the Milky Way and about 165,000 light years in diameter. Together with NGC 508 , it forms the galaxy pair ARP 229 .
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 503 , NGC 504 , IC 1687 , IC 1690 .
The object was discovered on September 12, 1784 by the German-British astronomer Wilhelm Herschel .
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
- Chandra
- Five galaxy clusters for autumn
- NGC 507 Group in Pisces
- Arp Atlas of Peculiar Galaxies
- Seligman Arp