NGC 7318A
| Galaxy NGC 7318A |
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|---|---|
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| Image of Stephan's quintet captured by the Hubble Space Telescope . Below is NGC 7317 , a little to the right of the center of the image are the two galaxies NGC 7318A (below) and NGC 7318B (above), above right NGC 7319 and to the left of it NGC 7320 . | |
| AladinLite | |
| Constellation | Pegasus |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 22 h 35 m 56.7 s |
| declination | + 33 ° 57 ′ 56 ″ |
| Appearance | |
| Morphological type | E2 pec |
| Brightness (visual) | 13.4 mag |
| Brightness (B-band) | 14.4 mag |
| Angular expansion | 1.2 ′ × 1 ′ |
| Position angle | 5 ° |
| Surface brightness | 13.7 mag / arcmin² |
| Physical data | |
| Affiliation | Stephan's quintet |
| Redshift | (2225 ± 11) · 10 −5 |
| Radial velocity | (6597 ± 32) km / s |
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Stroke distance v rad / H 0 |
(306 ± 22) x 10 6 ly (93.7 ± 6.6) Mpc |
| history | |
| discovery | Edouard J.-M. Stephan |
| Discovery date | September 23, 1876 |
| Catalog names | |
| NGC 7318-1 • UGC 12099 • PGC 69260 • CGCG 514-061 • MCG + 06-49-039 • 2MASX J22355791 + 3357562 • Arp 319 • HCG 92D • VV 288c • GC 6062 • Ark 560 | |
NGC 7318A is an elliptical galaxy in the constellation Pegasus , approximately 300 million light years from the Milky Way . NGC 7318A is a member of Stephen's Quintet . 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 .
NGC 7318 was discovered on September 23, 1876 by the French astronomer Édouard Jean-Marie Stephan .
Web links
Commons : NGC 7318A - collection of images, videos, and audio files
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