Arp 230
| Galaxy IC 51 |
|
|---|---|
![IC 51 [1] Hubble Space Telescope](https://de.wikipedia.org/wiki/Datei:IC51.jpg)
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| IC 51 Hubble Space Telescope | |
| AladinLite | |
| Constellation | whale |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 00 h 46 m 24.22 s |
| declination | -13 ° 26 ′ 32.5 ″ |
| Appearance | |
| Morphological type | S0 |
| Brightness (visual) | 12.8 mag |
| Brightness (B-band) | 13.8 mag |
| Angular expansion | 1 ′, 4 × 1 ′, 3 |
| Position angle | 30 ° |
| Surface brightness | 13.3 mag / arcmin² |
| Physical data | |
| Redshift | 0.005736 ± 0.000028 |
| Radial velocity | 1720 ± 8 km / s |
|
Stroke distance v rad / H 0 |
(79 ± 6) · 10 6 ly (24.1 ± 1.7) Mpc |
| history | |
| discovery | Stéphane Javelle |
| Discovery date | August 30, 1892 |
| Catalog names | |
| IC 51 • PGC 2710 • MCG -02-03-011 • IRAS 00438-1342 • 2MASX J00462421-1326326 • Arp 230 • GALEX ASC J004624.19-132632.9 • HIPASS J0046-13 • LDCE 41 NED003 | |
IC 51 = Arp 230 is a lens-shaped galaxy of the Hubble type S0 in the constellation Whale south of the ecliptic . It is estimated to be 79 million light years from the Milky Way and about 30,000 light years in diameter.
In the same area of the sky are u. a. the galaxies NGC 263 and IC 47 .
The galaxy was later recorded by Halton Arp in his Atlas of Peculiar Galaxies (galaxies with concentric rings) due to its unusual ring structure, which can also be seen well when observed using the Hubble Space Telescope . A more precise classification, as “Good candidate for polar-ring” ( polar ring galaxy ), was published in the early 1990s.
The object was discovered on August 30, 1892 by Stéphane Javelle with what was then the world's largest refractor at the Observatoire de Nice and was later listed in the Index Catalog .
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
Individual evidence
- ^ Aladin Lite
- ↑ a b c NASA / IPAC EXTRAGALACTIC DATABASE
- ↑ a b c d e f SEDS : IC 51
- ^ Halton Arp : Arp 230
- ^ J. Westphal: Peculiar and Interacting Galaxies
- ↑ Bradley C. Whitmore, Ray A. Lucas, Douglas B. McElroy, Thomas Y. Steiman-Cameron, Penny D. Sackett, Rob P. Olling: New observations and a photographic atlas of polar-ring galaxies , bibcode : 1990AJ .. ..100.1489W
- ↑ S. Javelle : Catalog de Nébuleuses Découvertes Avec le Grand Equatorial de l'Observatoire de Nice , bibcode : 1895AnNic ... 4B ... 1J (see J. 33)
- ^ JLE Dreyer : Index Catalog of Nebulæ found in the years 1888 to 1894, with Notes and Corrections to the New General Catalog , bibcode : 1895MmRAS..51..185D .
