NGC 942
| Galaxy NGC 942 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | whale |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 02 h 29 m 10.2 s |
| declination | -10 ° 50 ′ 10 ″ |
| Appearance | |
| Morphological type | I0? pec |
| Brightness (visual) | 13.0 likes |
| Brightness (B-band) | 13.9 likes |
| Angular expansion | 2.8 ′ × 1.3 ′ |
| Position angle | 35 ° |
| Surface brightness | 14.3 mag / arcmin² |
| Physical data | |
| Redshift | 0.015064 ± 0.000023 |
| Radial velocity | (4516 ± 7) km / s |
|
Stroke distance v rad / H 0 |
(201 ± 14) · 10 6 ly (61.7 ± 4.3) Mpc |
| history | |
| discovery | Frank Muller |
| Discovery date | 1886 |
| Catalog names | |
| NGC 942 • PGC 9457 • MCG -02-07-019 • Arp 309 • VV 217b • NVSS J022910-105009 • HOLM 59A | |
NGC 942 is a lenticular galaxy of the Hubble type S0 / a in the constellation Whale south of the ecliptic . It is an estimated 201 million light years away from the Milky Way and has a diameter of around 170,000 ly. Together with NGC 943 , it forms the interacting galaxy pair Arp 309 or Holm 59 .
Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This pair of galaxies belongs to the class Unclassified double galaxies .
In the same area of the sky are the galaxies NGC 945 , NGC 948 , NGC 950 , IC 230 .
The property was discovered by Frank Muller in 1886 .
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
Web links
Commons : NGC 942 - collection of images, videos, and audio files
