NGC 7752

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Galaxy
NGC 7752
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Image of the spiral galaxies NGC 7752 and 7753 with the help of the 81 cm mirror telescope of the Mount Lemmon Observatory.
Image of the spiral galaxies NGC 7752 and 7753 with the help of the 81 cm mirror telescope of the Mount Lemmon Observatory .
AladinLite
Constellation Pegasus
Position
equinoxJ2000.0 , epoch : J2000.0
Right ascension 23 h 46 m 58.5 s
declination + 29 ° 27 ′ 32 ″
Appearance
Morphological type I0: / HII  
Brightness  (visual) 14.0 mag
Brightness  (B-band) 15.0 mag
Angular expansion 0.9 ′ × 0.5 ′
Position angle 113 °
Surface brightness 13.2 mag / arcmin²
Physical data
Redshift 0.016918 ± 0.000017  
Radial velocity 5072 ± 5 km / s  
Stroke distance
v rad  / H 0
(235 ± 16)  x  10 6  ly
(72.0 ± 5.0)  Mpc 
diameter 55,000 ly
history
discovery RJ Mitchell
Discovery date November 22, 1854
Catalog names
NGC  7752 • UGC  12779 • PGC  72382 • MCG  + 05-56-004 • 2MASX  J23465855 + 2927321 • Arp  86 • LDCE 1597 NED001

NGC 7752 is an irregular galaxy of Hubble type I0 in the constellation Pegasus at the northern sky . It is about 235 million light years away from the Milky Way and has a maximum extent of about 55,000 light years .

Together with its interacting companion NGC 7753 , it forms the object Arp 86 . NGC 7752 is apparently on one of the spiral arms of NGC 7753.

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 galaxy was discovered on November 22, 1854 by RJ Mitchell , an assistant to William Parsons .

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

Individual evidence

  1. a b c d e NASA / IPAC EXTRAGALACTIC DATABASE
  2. a b c NGC 7752
  3. Seligman