Arp 104
Galaxy Arp 104 |
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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 |
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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 |
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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