NGC 547
| Galaxy NGC 547 |
|
|---|---|
|
|
| NGC547 & NGC545 SDSS recording | |
| AladinLite | |
| Constellation | whale |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 01 h 26 m 00.6 s |
| declination | -01 ° 20 ′ 43 ″ |
| Appearance | |
| Morphological type | E1 |
| Brightness (visual) | 12.2 mag |
| Brightness (B-band) | 13.2 mag |
| Angular expansion | 1.9 ′ × 1.8 ′ |
| Position angle | 85 ° |
| Surface brightness | 12.7 mag / arcmin² |
| Physical data | |
| Affiliation | Abell 194 |
| Redshift | 0.018239 +/- 0.000020 |
| Radial velocity | 5468 +/- 6 km / s |
|
Stroke distance v rad / H 0 |
(247 ± 17) · 10 6 ly (75.7 ± 5.3) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | October 1, 1785 |
| Catalog names | |
| NGC 547 • UGC 1009 • PGC 5324 • CGCG 385-133 • MCG + 00-04-143 • 2MASX J01260057-0120424 • Arp 308 NED02 • GC 323 • H II 449 • LEDA 5324 • LDCE 89 NED016 | |
NGC 547 is an elliptical galaxy in the constellation Whale south of the celestial equator . It is estimated to be 247 million light years away from the Milky Way and has a diameter of about 135,000 ly.
In the same area of the sky there are u. a. the galaxies NGC 541 , NGC 543 , NGC 545 , NGC 548 . Together with NGC 545, it forms the galaxy pair Arp 308 . Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This pair of galaxies belongs to the class Unclassified double galaxies .
The object was discovered on October 1, 1785 by the German-British astronomer Wilhelm Herschel .
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