NGC 2648
| Galaxy NGC 2648 |
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|---|---|
![LEDA 24469 (left edge of picture), NGC 2648 & LEDA 4174606 [1] (r)](https://de.wikipedia.org/wiki/Datei:NGC2648_-_SDSS_DR14.jpg)
|
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| LEDA 24469 (left edge of image) , NGC 2648 & LEDA 4174606 (r) | |
| AladinLite | |
| Constellation | cancer |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 08 h 42 m 39.8 s |
| declination | + 14 ° 17 ′ 08 ″ |
| Appearance | |
| Morphological type | S (s) b / RET |
| Brightness (visual) | 12.0 mag |
| Brightness (B-band) | 12.9 mag |
| Angular expansion | 3.2 ′ × 1.1 ′ |
| Position angle | 148 ° |
| Surface brightness | 13.2 mag / arcmin² |
| Physical data | |
| Redshift | 0.006871 ± 0.000033 |
| Radial velocity | (2060 ± 10) km / s |
|
Stroke distance v rad / H 0 |
(87 ± 6) · 10 6 ly (26.7 ± 1.9) Mpc |
| history | |
| discovery | William Herschel |
| Discovery date | March 19, 1784 |
| Catalog names | |
| NGC 2648 • UGC 4541 • PGC 24464 • CGCG 060-035 • MCG + 02-22-005 • 2MASX J08423982 + 1417078 • Arp 89 • GC 1688 • H III 49 • h 521/3135 • GALEX ASC J084239.93 + 141706.7 | |
NGC 2648 is a spiral galaxy of Hubble type Sa in the constellation of Cancer at the northern sky . It is estimated to be 87 million light years away from the Milky Way and has a diameter of around 85,000 ly . Together with PGC 24469 , it forms the interactive pair of galaxies Arp 89, which is cataloged in the Atlas of Peculiar Galaxies .
Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This galaxy belongs to the class spiral galaxies with a large companion of high surface brightness on one arm (Arp catalog) .
The object was discovered by William Herschel on March 19, 1784 .
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