NGC 169
| Galaxy NGC 169 |
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|---|---|
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| SDSS image of NGC 169 (above) and IC 1559 (below) | |
| AladinLite | |
| Constellation | Andromeda |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 00 h 36 m 51.6 s |
| declination | + 23 ° 59 ′ 27 ″ |
| Appearance | |
| Morphological type | SA (s) from: / sp |
| Brightness (visual) | 12.4 mag |
| Brightness (B-band) | 13.2 mag |
| Angular expansion | 2.6 ′ × 0.6 ′ |
| Position angle | 88 ° |
| Surface brightness | 12.7 mag / arcmin² |
| Physical data | |
| Redshift | 0.015434 ± 0.000030 |
| Radial velocity | (4627 ± 9) km / s |
|
Stroke distance v rad / H 0 |
(214 ± 15) · 10 6 ly (65.5 ± 4.6) Mpc |
| history | |
| discovery | RJ Mitchell |
| Discovery date | September 18, 1857 |
| Catalog names | |
| NGC 169 • UGC 365 • PGC 2202 • CGCG 479-044 • MCG + 04-02-035 • IRAS 00342 + 2342 • 2MASX J00365161 + 2359273 • Arp 282 • GC 82 • KPG 13A | |
NGC 169 is a spiral galaxy of Hubble type Sb in the constellation Andromeda on the northern sky . It is an estimated 214 million light years away from the Milky Way and has a diameter of about 160,000 ly. Together with IC 1559 , it forms the interacting galaxy pair Arp 282 and KPG 13 .
Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This galaxy pair belongs to the class double galaxies with inflow and attraction .
In the same area of the sky is u. a. the galaxy NGC 160 .
The object was discovered on September 18, 1857 by the Irish astronomer RJ Mitchell, an assistant to William Parsons .
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