NGC 545
| Galaxy NGC 545 |
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|---|---|
![NGC547 & NGC545 with LEDA 169816 [1] (left) SDSS mount](https://de.wikipedia.org/wiki/Datei:NGC545_-_NGC547_-_SDSS_DR14.png)
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| NGC547 & NGC545 with LEDA 169816 (left) SDSS image | |
| AladinLite | |
| Constellation | whale |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 01 h 25 m 59.1 s |
| declination | -01 ° 20 ′ 25 ″ |
| Appearance | |
| Morphological type | SA0- |
| Brightness (visual) | 12.3 mag |
| Brightness (B-band) | 13.3 mag |
| Angular expansion | 2.6 ′ × 1.6 ′ |
| Position angle | 55 ° |
| Surface brightness | 13.9 mag / arcmin² |
| Physical data | |
| Affiliation |
Abell 194 NGC 541 group LGG 25 |
| Redshift | 0.017806 ± 0.000025 |
| Radial velocity | (5338 ± 7) km / s |
|
Stroke distance v rad / H 0 |
(241 ± 17) x 10 6 ly (73.9 ± 5.2) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | October 1, 1785 |
| Catalog names | |
| NGC 545 • UGC 1007 • PGC 5323 • CGCG 385-132 • MCG + 00-04-142 • IRAS 01234-0136 • 2MASX J01255909-0120254 • Arp 308 • VV 963b • GC 322 • H II 448 • GALEXASC J012559.13- 012024.8 • LEDA 5323 | |
NGC 545 is an elliptical galaxy of Hubble type E / S0 in the constellation Cetus south of the celestial equator . It is an estimated 241 million light years away from the Milky Way and has a diameter of about 185,000 ly. It is the brightest member of the Abell 194 galaxy cluster . Together with NGC 547 , it forms the galaxy pair Arp 308 or KPG 32 .
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 .
In the same area of the sky are u. a. the galaxies NGC 535 , NGC 541 , NGC 543 , NGC 548 .
The object was discovered on October 1, 1785 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
Commons : NGC 545 - collection of images, videos, and audio files
