NGC 7805

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Galaxy
NGC 7805
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NGC 7805 (l) and NGC 7806 (r) with LEDA 111 (r) [1] 81 cm reflecting telescope of the Mount Lemmon Observatory
NGC 7805 (l) and NGC 7806 (r) with LEDA 111 (r) 81 cm reflecting telescope of the Mount Lemmon observatory
AladinLite
Constellation Pegasus
Position
equinox :  J2000.0 , epoch : J2000.0
Right ascension 00 h 01 m 26.77 s
declination + 31 ° 26 ′ 01.5 ″
Appearance
Morphological type SAB0 ^ 0 ^: / pec  
Brightness  (visual) 13.2 mag
Brightness  (B-band) 14.2 mag
Angular expansion 1.2 ′ × 0.9 ′
Position angle 45 °
Surface brightness 13.1 mag / arcmin²
Physical data
Affiliation NGC 7819 Group
NGC 7831 Group
LGG 1  
Redshift 0.016048 ± 0.000023  
Radial velocity 4811 ± 7 km / s  
Stroke distance
v rad  / H 0 		(223 ± 16)  x  10 6  ly
(68.4 ± 4.8)  Mpc 
diameter 80,000 ly
history
discovery William Herschel
Discovery date October 9, 1790
Catalog names
NGC  7805 • UGC  12908 • PGC  109 • CGCG  498-064 • CGCG 499-036 • MCG  + 05-01-024 • KUG  2358 + 311 • 2MASX  J00012677 + 3126016 • Arp  112 • Mrk  333 • VV  226 • GC  5042 • H  III 855 • h  2294 • GALEX MSC J000126.75 + 312601.5 • KPG 602A • HOLM 826A

NGC 7805 is a lenticular galaxy of the Hubble type SB0 in the constellation Pegasus in the northern sky . It is an estimated 223 million light years away from the Milky Way and is around 75,000 light years in diameter. The galaxy is considered a member of the NGC 7831 group ( LGG 1 ). Together with NGC 7806, the gravitationally bound pair Arp 112 , KPG 602A or Holm 826A .

Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This galaxy belongs to the class of elliptical galaxies that repel spiral arms (Arp catalog) .

The object was discovered on October 9, 1790 by Wilhelm Herschel with his 18.7-inch reflector telescope and later included in his New General Catalog by Johan Dreyer .

Web links

Commons : NGC 7805  - collection of images, videos, and audio files

Individual evidence

  1. ^ Aladin Lite
  2. ↑ a b c d e NASA / IPAC EXTRAGALACTIC DATABASE
  3. ↑ a b c d e NGC 7805
  4. ^ VizieR
  5. ↑ Seligman