NGC 942

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Galaxy
NGC 942
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NGC 0942 DSS.jpg
AladinLite
Constellation whale
Position
equinoxJ2000.0 , 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

Individual evidence

  1. a b c d NASA / IPAC EXTRAGALACTIC DATABASE
  2. a b c d e f SEDS : NGC 942
  3. Seligman