NGC 4647
| Galaxy NGC 4647 |
|
|---|---|
|
|
| The galaxies Messier 60 (middle) and NGC 4647 (top right) = ARP 116 ( Hubble Space Telescope ) | |
| AladinLite | |
| Constellation | Virgin |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 12 h 43 m 32.3 s |
| declination | + 11 ° 34 ′ 55 ″ |
| Appearance | |
| Morphological type | SAB (rs) c / HII |
| Brightness (visual) | 11.4 mag |
| Brightness (B-band) | 12.1 mag |
| Angular expansion | 2.9 ′ × 2.3 ′ |
| Position angle | 125 ° |
| Surface brightness | 13.3 mag / arcmin² |
| Physical data | |
| Affiliation | Virgo cluster WBL 421 Messier 87 group NGC 4639 group NGC 4486 group LGG 289 |
| Redshift | 0.004700 ± 0.000003 |
| Radial velocity | 1409 ± 1 km / s |
|
Stroke distance v rad / H 0 |
(61 ± 4) · 10 6 ly (18.6 ± 1.3) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | March 15, 1784 |
| Catalog names | |
| NGC 4647 • UGC 7896 • PGC 42816 • CGCG 071-015 • MCG + 02-33-001 • IRAS 12410 + 1151 • 2MASX J12433254 + 1134568 • VCC 1972 • Arp 116 • VV 206b • GC 3180 • H III 44 • h 1405 • NVSS J124332 + 113458 • Holm 448B • KPG 353A • LDCE 904 NED236 • EVCC 1099 | |
NGC 4647 is a bar-spiral galaxy with extensive star formation areas of the Hubble type SBc in the constellation Virgo on the ecliptic . It is an estimated 61 million light years away from the Milky Way and about 55,000 light years in diameter. Under the catalog number VVC 1972 it is listed as a member of the Virgo galaxy cluster , a collection of over 2000 galaxies that are held together by their mutual attraction.
Together with Messier 60 ( NGC 4649 ) it forms the gravitationally bound galaxy pair ARP 116 , Holm 448 or KPG 353
Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This galaxy belongs to the class of elliptical galaxies close to spiral galaxies and disturbing them (Arp catalog) .
In the same area of the sky are u. a. the galaxies NGC 4637 , NGC 4638 , IC 3684 , IC 3698 .
The Type I supernova SN 1979A was observed here.
The object was discovered on March 15, 1784 by the German-British astronomer Wilhelm Herschel .
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
Web links
- SIMBAD Astronomical Database
- Capella Observatory
- astronews.com: View of an unequal pair of galaxies September 7, 2012
- astronews.com: Picture of the day April 11, 2013
- Spektrum.de : Amateur recordings [1]
- ARP ATLAS OF PECULIAR GALAXIES
- Seligman Arp