NGC 3994
Galaxy NGC 3994 |
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Photo from the Hubble Space Telescope | |
AladinLite | |
Constellation | Big Bear |
Position equinox : J2000.0 , epoch : J2000.0 |
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Right ascension | 11 h 57 m 36.9 s |
declination | + 32 ° 16 ′ 39 ″ |
Appearance | |
Morphological type | SA (r) c / HII / Sbrst / LINER |
Brightness (visual) | 12.7 mag |
Brightness (B-band) | 13.4 mag |
Angular expansion | 0.9 ′ × 0.5 ′ |
Position angle | 10 ° |
Surface brightness | 11.7 mag / arcmin² |
Physical data | |
Affiliation | LGG 259 |
Redshift | 0.010294 +/- 0.000053 |
Radial velocity | 3086 +/- 16 km / s |
Stroke distance v rad / H 0 |
(138 ± 10) · 10 6 ly (42.3 ± 3.0) Mpc |
history | |
discovery | Heinrich d'Arrest |
Discovery date | April 6, 1864 |
Catalog names | |
NGC 3994 • UGC 6936 • PGC 37616 • CGCG 186-074 • MCG + 06-26-059 • KUG 1155 + 325A • 2MASX J11573685 + 3216400 • Arp 313 • VV 249 • KCPG 311B • LDCE 0852 NED006 |
NGC 3994 is an active spiral galaxy with a high rate of star formation of the Hubble type Sc in the constellation Great Bear in the northern sky . It is an estimated 138 million light years away from the Milky Way and has a diameter of about 35,000 ly. Together with NGC 3991 and NGC 3995 , it forms the galaxy trio Arp 313 . Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This galaxy triplet belongs to the class of galaxy groups .
The object was discovered on April 6, 1864 by the astronomer Heinrich Louis d'Arrest with an 11-inch telescope.
Web links
Commons : NGC 3994 - 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