NGC 7253
| Galaxy NGC 7253 |
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|---|---|
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| SDSS recording | |
| AladinLite | |
| Constellation | Pegasus |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 22 h 19 m 28.9 s |
| declination | + 29 ° 23 ′ 30 ″ |
| Appearance | |
| Morphological type | SB? + S? |
| Brightness (visual) | A: 13.7 mag B: 14.3 mag |
| Brightness (B-band) | A: 14.4 mag B: 15.0 mag |
| Angular expansion | A: 1.7 / 0.8 B: 1.6 / 0.5 |
| Position angle | A: 116 ° B: 71 ° |
| Surface brightness | A: 13.9 mag / arcmin² B: 13.9 mag / arcmin² |
| Physical data | |
| Redshift | 0.015738 ± 0.000093 |
| Radial velocity | 4718 ± 28 km / s |
|
Stroke distance v rad / H 0 |
(220 ± 15) · 10 6 ly (67.5 ± 4.7) Mpc |
| history | |
| discovery | Albert Marth |
| Discovery date | September 9, 1863 |
| Catalog names | |
| NGC 7253A / B • UGC 11984/11985 • PGC 68572/68573 • CGCG 494-014 • MCG + 05-52-010 / 011 • IRAS 22171 + 2908 • Arp 275 • VV 242 • HOLM 790A / B | |
NGC 7253 is an interacting pair of galaxies in the constellation Pegasus. It is estimated to be 220 million light years from the Milky Way . The two galaxies are also known as NGC 7253A and NGC 7253B and form the interactive galaxy pair Arp 278 . Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This pair of galaxies belongs to the class interacting double galaxies .
The object was discovered by Albert Marth on September 9, 1863 .
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