Astronomy:NGC 6101
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Short description: Globular cluster in the constellation Apus
| NGC 6101 | |
|---|---|
 Hubble Space Telescope image of the central region of NGC 6101 | |
| Observation data (J2000 epoch) | |
| Class | X[1] |
| Constellation | Apus |
| Right ascension | 16h 25m 48.12s[2] |
| Declination | –72° 12′ 07.9″[2] |
| Apparent magnitude (V) | 9[3] |
| Apparent dimensions (V) | 10.7'[3] |
| Physical characteristics | |
| Metallicity | [math]\displaystyle{ \begin{smallmatrix}\left[\ce{Fe}/\ce{H}\right]\end{smallmatrix} }[/math] = –1.76[4] dex |
| Estimated age | 12.54 Gyr[4] |
| Other designations | Caldwell 107 |
NGC 6101 (also known as Caldwell 107) is a globular cluster in the constellation Apus, which was discovered by James Dunlop and catalogued by him as Δ68. It is located at a distance of about 47,600 light-years from the Sun and about 36,500 light-years from the Galactic Center of the Milky Way. It requires a telescope of at least 20 cm (7.9 in) aperture to resolve individual stars.[3] Research revealed this cluster to contain an unexpected large number of black holes.[5]
References
- ↑ Shapley, Harlow; Sawyer, Helen B. (August 1927), "A Classification of Globular Clusters", Harvard College Observatory Bulletin 849 (849): 11–14, Bibcode: 1927BHarO.849...11S.
- ↑ 2.0 2.1 Goldsbury, Ryan et al. (December 2010), "The ACS Survey of Galactic Globular Clusters. X. New Determinations of Centers for 65 Clusters", The Astronomical Journal 140 (6): 1830–1837, doi:10.1088/0004-6256/140/6/1830, Bibcode: 2010AJ....140.1830G.
- ↑ 3.0 3.1 3.2 Dunlop, Storm (2005). Atlas of the Night Sky. Collins. ISBN 978-0-00-717223-8. https://archive.org/details/collinsatlasofni0000dunl.
- ↑ 4.0 4.1 Forbes, Duncan A.; Bridges, Terry (May 2010), "Accreted versus in situ Milky Way globular clusters", Monthly Notices of the Royal Astronomical Society 404 (3): 1203–1214, doi:10.1111/j.1365-2966.2010.16373.x, Bibcode: 2010MNRAS.404.1203F.
- ↑ Monthly Notices of the Royal Astronomical Society. nov 2016, published online aug 22 2016
External links
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