NGC 3994
| Galaxy NGC 3994 |
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|---|---|
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| Photo from the Hubble Space Telescope | |
| AladinLite | |
| Constellation | Big Bear |
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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 |
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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