NGC 4747
| Galaxy NGC 4747 |
|
|---|---|
|
|
| SDSS recording | |
| AladinLite | |
| Constellation | Berenike's hair |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 12 h 51 m 45.9 s |
| declination | + 25 ° 46 ′ 37 ″ |
| Appearance | |
| Morphological type | SBcd? / pec edge-on |
| Brightness (visual) | 12.2 mag |
| Brightness (B-band) | 12.9 mag |
| Angular expansion | 3.30 x 1.3 |
| Position angle | 30 ° |
| Surface brightness | 13.6 mag / arcmin² |
| Physical data | |
| Redshift | 0.003969 ± 0.000003 |
| Radial velocity | (1190 ± 1) km / s |
|
Stroke distance v rad / H 0 |
(53 ± 4) · 10 6 ly (16.3 ± 1.1) Mpc |
| history | |
| discovery | William Herschel |
| Discovery date | April 6, 1785 |
| Catalog names | |
| NGC 4747 • UGC 8005 • PGC 43586 • CGCG 129-028 • MCG + 04-30-023 • IRAS 12492 + 2602 • Arp 159 • GC 3266/3269 • H II 344 • LDCE 867 NED129 • HOLM 468C • SDSS J125145.95 +254637.4 | |
NGC 4747 = Arp 159 is a bar-spiral galaxy of the Hubble type SBcd? in the constellation Haar der Berenike in the northern sky . It is estimated to be 53 million light years from the Milky Way and about 50,000 light years in diameter.
Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This galaxy belongs to the class of galaxies with internal absorption .
In the same area of the sky are u. a. the galaxies NGC 4712 , NGC 4725 , IC 831 , IC 832 .
The object was discovered by William Herschel on April 6, 1785 .
Web links
Commons : NGC 4747 - collection of images, videos, and audio files
- SIMBAD Astronomical Database
- Spektrum.de : Amateur recordings [1] [2]
- ARP ATLAS OF PECULIAR GALAXIES
- Seligman Arp
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