KPG 239
| KPG 239 NGC 3286 and NGC 3288 |
||
|---|---|---|
  |
||
| KPG 239A (NGC 3286) above and KPG 239B (NGC 3288) below ( SDSS images) | ||
|
Observation dates equinox : J2000.0 , epoch : J2000.0 |
||
| Constellation | Ursa Major | |
| Right ascension | 10 h 36.4 m | |
| declination | + 58 ° 35 ′ 0 ″ | |
|
Apparent brightness (V-band) |
A. | approx. 13.6 mag |
| B. | approx. 13.8 mag | |
| Apparent brightness (B-band) |
A. | about 14.3 mag |
| B. | approx 14.5 mag | |
| Physical data | ||
| Heliocentric radial velocity | A. | (8094 ± 47) km / s |
| B. | 8151 ± 56 km / s | |
| distance | approx. 110 M pc | |
| Catalog entries | ||
|
KPG 239A / NGC 3286 : CGCG 290-56 • MCG + 10-15-112 • PGC 31433 KPG 239B / NGC 3288 : UGC 5752 • CGCG 290-57 • MCG + 10-15-114 • PGC 31446 • IRAS F10332 + 5849 |
||
KPG 239 (also CPG 239 ) is a pair of galaxies in the constellation Ursa Major around 110 million parsecs away. The pair consists of two galaxies separated by about 4 arc minutes with similar apparent brightness. The pair does not form an isolated system, but there are several other galaxies in the same field, among which these two stand out most clearly.
The more northerly component, KPG 239A or NGC 3286 , is classified as an elliptical to lenticular galaxy (E3 / S0 pec), while the more southerly, KPG 239B or NGC 3288 , is classified as a spiral galaxy (Sb pec). At KPG 239B there is an arcuate spiral arm tapering to the south. KPG 239A is a powerful X-ray source.
literature
- M. Henriksen, S. Cousineau: An X-Ray Survey of Galaxies in Pairs. In: The Astrophysical Journal. Volume 511, No. 2, 1999, pp. 595-611.
- A. Franco-Balderas, HM Hernández-Toledo, D. Dultzin-Hacyan: BVRI surface photometry of mixed morphology pairs of galaxies. II. The second data set. In: Astronomy and Astrophysics. Volume 417, 2004, pp. 411-419.
- HM Hernández-Toledo, V. Avila-Reese, JR Salazar-Contreras, CJ Conselice: The Effects of Interactions on the Structure and Morphology of Elliptical / Lenticular Galaxies in Pairs. In: The Astronomical Journal. Volume 132, No. 1, 2006, pp. 71-84.