NGC 3247
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| Infrared image from the Spitzer Space Telescope . NGC 3247 (blue) lies in the center of the nebula RCW 49 . | |
| AladinLite | |
| Constellation | Keel of the ship |
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Position equinox : J2000.0 |
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| Right ascension | 10 h 24 m 14.0 s |
| declination | -57 ° 45 ′ 48 ″ |
| Appearance
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| classification | II2p |
| Brightness (visual) | 7.6 likes |
| Brightness (B-band) | 8.0 likes |
| Angular expansion | 5.0 ' |
| Redness ( excess color E (BV)) | 0.39 ± 0.07 |
| Physical data
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| Affiliation | RCW 49 |
| distance | approx. 5000 ly (1547 pc ) |
| diameter | 20,000 ly |
| history | |
| Discovered by | John Herschel |
| Discovery time | April 1, 1834 |
| Catalog names | |
| NGC 3247 • C 1024-576 • OCl 809 • Cr 220 • Lund 543 • ESO 127-SC19 • GC 2106 • h 3250 • | |
NGC 3247 is an open star cluster and the central OB association of the massive star formation area RCW 49 in the constellation Carina in the southern sky. It is located nearly 20,000 light years from the Sun in the Sagittarius spiral arm of the Milky Way. Overall, NGC 3247 is divided into three areas by dark bands, with the compact star cluster Westerlund 2 on its western edge .
NGC 3247 was discovered by John Herschel on April 1, 1834 .
Individual evidence
literature
- C. Grubissich: RGU photometry of the galactic star cluster NGC 3247 . In: Astronomy and Astrophysics Supplement Series , Vol. 29, September 1977, pp. 379ff., Bibcode : 1977A & AS ... 29..379G
- JA Ahumad: CCD Photometry of the Open Clusters NGC 2658, NGC 2849, and NGC 3247 . In: Revista Mexicana de Astronomía y Astrofísica , Vol. 39, 2003, pp. 41ff., Bibcode : 2003RMxAA..39 ... 41A
- Tsujimoto et al .: An X-Ray Imaging Study of the Stellar Population in RCW 49 . In: The Astrophysical Journal , Vol. 665, 2007, Issue 1, pp. 719ff., Bibcode : 2007ApJ ... 665..719T