NGC 3738
| Galaxy NGC 3738 |
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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 35 m 48.8 s |
| declination | + 54 ° 31 ′ 26 ″ |
| Appearance | |
| Morphological type | Irr / HII |
| Brightness (visual) | 11.5 likes |
| Brightness (B-band) | 12.1 mag |
| Angular expansion | 2.5 ′ × 1.9 ′ |
| Position angle | 155 ° |
| Surface brightness | 13.0 mag / arcmin² |
| Physical data | |
| Affiliation | M81 group |
| Redshift | 0.000764 ± 0.000013 |
| Radial velocity | (229 ± 4) km / s |
|
Stroke distance v rad / H 0 |
(13 ± 1) x 10 6 ly (4.11 ± 0.3) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | April 14, 1789 |
| Catalog names | |
| NGC 3738 • UGC 6565 • PGC 35856 • CGCG 268-060 • MCG + 9-19-130 • IRAS 11330 + 5448 • KUG 1133 + 548 • Arp 234 • GC 2454 • H II 783 • | |
NGC 3738 = Arp 234 is an active irregular dwarf galaxy with extensive star formation areas of the Hubble type Im in the constellation Great Bear in the northern sky . It is an estimated 13 million light years away from the Milky Way and has a diameter of around 10,000 ly. Halton Arp divided his catalog of unusual galaxies into groups according to purely morphological criteria. This galaxy belongs to the class galaxies showing signs of splitting .
In the same area of the sky are u. a. the galaxies NGC 3733 , NGC 3756 , NGC 3759 , IC 2943 .
The object was discovered on April 14, 1789 by the German-British astronomer Wilhelm Herschel .
Web links
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