NGC 3239
Galaxy NGC 3239 |
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NGC 3239 imaged with the 81 cm reflecting telescope of the Mount Lemmon Observatory | |
AladinLite | |
Constellation | lion |
Position equinox : J2000.0 , epoch : J2000.0 |
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Right ascension | 10 h 25 m 04.9 s |
declination | + 17 ° 09 ′ 49 ″ |
Appearance | |
Morphological type | IB (s) m / pec |
Brightness (visual) | 11.1 mag |
Brightness (B-band) | 11.7 mag |
Angular expansion | 4.5 ′ × 2.4 ′ |
Position angle | 81 ° |
Surface brightness | 13.5 mag / arcmin² |
Physical data | |
Affiliation | WBL 270 |
Redshift | 0.002512 ± 0.000010 |
Radial velocity | (753 ± 3) km / s |
Stroke distance v rad / H 0 |
(30 ± 2) x 10 6 ly (9.1 ± 0.6) Mpc |
history | |
discovery | William Herschel |
Discovery date | March 21, 1784 |
Catalog names | |
NGC 3239 • UGC 5637 • PGC 30560 • CGCG 094-038 • MCG + 03-27-025 • IRAS 10224 + 1724 • 2MASX J10250486 + 1709492 • Arp 263 • VV 95 • GC 2099 • H IV 10 • h 710 • h 3246 • HIPASS J1025 + 17 • KPG 236A • LDCE 778 NED001 |
NGC 3239 = Arp 263 is an irregular galaxy of the Hubble type IBm / P in the constellation Leo on the ecliptic . It is estimated to be 30 million light-years from the Milky Way and about 40,000 light-years across.
In the same area of the sky is u. a. the galaxy IC 607 .
Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This galaxy belongs to the class of galaxies with irregular clusters .
The type IIP supernova SN 2012A was observed here.
The object was discovered by Wilhelm Herschel on March 21, 1784 .
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
Commons : NGC 3239 - collection of images, videos, and audio files
- SIMBAD Astronomical Database
- Apod: NGC 3239 and SN 2012A
- Spektrum.de : Amateur recording [1]
- Arp Atlas of Peculiar Galaxies
- Seligman Arp