NGC 839
| Galaxy NGC 839 |
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|---|---|
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| Photo from the Hubble Space Telescope | |
| AladinLite | |
| Constellation | whale |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 02 h 09 m 42.9 s |
| declination | -10 ° 11 ′ 03 ″ |
| Appearance | |
| Morphological type | Spec / sp / LINER / Sy2 |
| Brightness (visual) | 13.1 mag |
| Brightness (B-band) | 14.1 mag |
| Angular expansion | 0.9 ′ × 0.4 ′ |
| Position angle | 84 ° |
| Surface brightness | 13.0 mag / arcmin² |
| Physical data | |
| Affiliation | HCG 16 LGG 49 |
| Redshift | 0.012922 ± 0.000017 |
| Radial velocity | 3874 ± 5 km / s |
|
Stroke distance v rad / H 0 |
(173 ± 12) · 10 6 ly (53.1 ± 3.7) Mpc |
| history | |
| discovery | William Herschel |
| Discovery date | November 28, 1785 |
| Catalog names | |
| NGC 839 • PGC 8254 • MCG -02-06-034 • IRAS 02072-1025 • 2MASX J02094273-1011016 • HCG 16D • GC 499 • H II-485 • h 202 • h 2466 • part of Arp 318 | |
NGC 839 is a lens-shaped galaxy with an active nucleus of the Hubble-type S0 / P in the constellation Whale south of the celestial equator . It is an estimated 173 million light years away from the Milky Way and about 70,000 light years in diameter.
Together with NGC 833 , NGC 835 and NGC 838 , it forms a group of galaxies , which is cataloged as HCG 16 ( Arp 318 ).
Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This group of galaxies belongs to the class of galaxies .
The object was discovered by William Herschel on November 28, 1785 .
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 839 - collection of images, videos, and audio files
- SIMBAD Astronomical Database
- GoBlack
- NGC 839: Shocks in an M82-like superwind
- ARP ATLAS OF PECULIAR GALAXIES
- Seligman Arp