NGC 5257
| Galaxy NGC 5257 |
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| The two galaxies NGC 5257 (left) and NGC 5258 (right) captured by the Hubble Space Telescope | |
| AladinLite | |
| Constellation | Virgin |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 13 h 39 m 52.9 s |
| declination | + 00 ° 50 ′ 24 ″ |
| Appearance | |
| Morphological type | SAB (s) b pec; HIILIRG |
| Brightness (visual) | 12.1 mag |
| Brightness (B-band) | 12.9 mag |
| Angular expansion | 1.6 ′ × 0.8 ′ |
| Position angle | 121 ° |
| Surface brightness | 12.2 mag / arcmin² |
| Physical data | |
| Redshift | 0.022676 ± 0.000030 |
| Radial velocity | (6798 ± 9) km / s |
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Stroke distance v rad / H 0 |
(302 ± 21) · 10 6 ly (92.5 ± 6.5) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | May 13, 1793 |
| Catalog names | |
| NGC 5257 • UGC 8641 • PGC 48330 • CGCG 017-055 • MCG + 00-35-015 • IRAS 13373 + 0105 • 2MASX J13395227 + 0050224 • Arp part of 240 • VV 55b • GC 3624 • H II 895 • h 1654 • KCPG 389A • Stile 532A • UM 598 | |
NGC 5257 is a barred spiral galaxy in the constellation Virgo . It is about 302 million light years away from the Milky Way and interacts with the galaxy NGC 5258 ( Arp 240 ).
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 on May 13, 1793 by the German-British astronomer Wilhelm Herschel .
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