NGC 2992
| Galaxy NGC 2992 |
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|---|---|
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| NGC 2992 (right), NGC 2993 and FGC 0938 (below) image taken with an 80 cm telescope | |
| AladinLite | |
| Constellation | Water snake |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 09 h 45 m 42.0 s |
| declination | -14 ° 19 ′ 35 ″ |
| Appearance | |
| Morphological type | Sa / pec / Sy1.9 |
| Brightness (visual) | 12.2 mag |
| Brightness (B-band) | 13.1 mag |
| Angular expansion | 3.7 ′ × 0.9 ′ |
| Position angle | 15 ° |
| Surface brightness | 13.4 mag / arcmin² |
| Physical data | |
| Redshift | 0.007710 ± 0.000013 |
| Radial velocity | (2311 ± 4) km / s |
|
Stroke distance v rad / H 0 |
(95 ± 7) x 10 6 ly (29.1 ± 2.0) Mpc |
| history | |
| discovery | William Herschel |
| Discovery date | February 8, 1785 |
| Catalog names | |
| NGC 2992 • PGC 27982 • MCG -02-25-014 • IRAS 09432-1405 • 2MASX J09454204-1419348 • Arp 245 • GC 1918 • H III 277 • h 635 • | |
NGC 2992 is a spiral galaxy with an active nucleus of the Hubble-type Sa in the constellation Water Snake south of the celestial equator . It is estimated to be 95 million light years away from the Milky Way and has a diameter of around 115,000 ly. Together with NGC 2993 , Arp 245N and FGC 0938 it forms a group of galaxies ( Arp 245 ). Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This galaxy belongs to the class galaxies showing signs of splitting .
The galaxy was discovered by William Herschel on February 8, 1785 .
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