Arp 104

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Galaxy
Arp 104
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Image taken with a 24-inch telescope; NGC 5216 above and NGC 5218 below
Image taken with a 24-inch telescope; NGC 5216 above and NGC 5218 below
AladinLite
Constellation Big Bear
Position
equinox :  J2000.0 , epoch : J2000.0
Right ascension 13 h 32 m 08 s
declination + 62 ° 44 ′
Appearance
Morphological type E0 pec / BLAGN (NGC 5216)
SB (s) b? pec / HII / LINER (NGC 5218)  
Brightness  (visual) 12.6 (NGC 5216)
12.3 (NGC 5218) mag
Brightness  (B-band) 13.6 (NGC 5216)
13.1 (NGC 5218) mag
Angular expansion 1.8 / 1.2 (NGC 5216)
1.8 / 1.3 (NGC 5218)
Position angle 28 ° (NGC 5216) / 100 ° (NGC 5218)
Surface brightness 13.5 (NGC 5216)
13.1 (NGC 5218) mag / arcmin²
Physical data
Affiliation LGG 354  
Redshift 0.009804 ± 0.000087
0.009783 ± 0.000072  
Radial velocity (2939 ± 26)
(2933 ± 22) km / s  
Stroke distance
v rad  / H 0 		(137 ± 10)  x  10 6  ly
(42.0 ± 3.0)  Mpc 
history
discovery Wilhelm Herschel
Discovery date March 19, 1790
Catalog names
NGC  5216/8 • UGC  8528/9 • PGC  47598/47603 • CGCG  316-019 / 20 • MCG  11-17-004 / 005 • Arp  104 • VV  103 • GC  3590, 3592 • H  II 841, II 842 • h  1635, 1636 • Keenan's System

Arp 104 , engl. also known as Keenan's system , is an interacting pair of galaxies in the constellation Ursa Major . It consists of the two galaxies NGC 5216 and NGC 5218 , which are connected by a faintly glowing bridge. The system is approximately 137 million light years from the Milky Way. Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This galaxy belongs to the class of elliptical galaxies associated with spirals .

The object was discovered by William Herschel on March 19, 1790 .

NGC 5218 group ( LGG 354 )

Galaxy Alternative name Distance / million Lj
NGC 5218 PGC 47603 137
NGC 5216 PGC 47598 137
PGC 47854 UGC 8571 143

Web links

Commons : Arp 104  - collection of images, videos and audio files

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 NASA / IPAC EXTRAGALACTIC DATABASE NGC 5216
  2. ↑ a b NASA / IPAC EXTRAGALACTIC DATABASE NGC 5218
  3. ↑ a b c d e f SEDS : NGC 5216
  4. ↑ a b c d e SEDS : NGC 5218
  5. ^ VizieR
  6. ↑ Seligman