NGC 7752
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 . | |
AladinLite | |
Constellation | Pegasus |
Position equinox : J2000.0 , epoch : J2000.0 |
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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