NGC 6712
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| NGC 6712 | |
|---|---|
| Observation data (J2000 epoch) | |
| Class | IX:[1] |
| Constellation | Scutum |
| Right ascension | 18h 53m 04.32s[2] |
| Declination | –08° 42′ 21.5″[2] |
| Distance | 22.5 kly (6.9 kpc)[3] |
| Apparent magnitude (V) | +8.69[2] |
| Physical characteristics | |
| Mass | 9.4×104[4] M☉ |
| Metallicity | –0.94[5] dex |
| Estimated age | 10.4 Gyr[5] |
| Other designations | GCl 103,[2] GC 4441 |
| See also: Globular cluster, List of globular clusters | |
NGC 6712 is a globular cluster that was probably discovered by Le Gentil on July 9, 1749 when investigating the Milky Way star cloud in Aquila. He described it as a "true nebula," in contrast to the open star cluster M11. Independently discovered by William Herschel on June 16, 1784 and cataloged as H I.47; he also first classified it as a round nebula. John Herschel was the first to described it as a globular star cluster during his observations in the 1830s.
References
- ↑ Shapley, Harlow; Sawyer, Helen B. (August 1927), "A Classification of Globular Clusters", Harvard College Observatory Bulletin (849): 11–14, Bibcode:1927BHarO.849...11S.
- ↑ 2.0 2.1 2.2 2.3 "SIMBAD Astronomical Database". Results for NGC 6712. Retrieved 2006-11-16.
- ↑ Boyles, J. et al. (November 2011), "Young Radio Pulsars in Galactic Globular Clusters", The Astrophysical Journal 742 (1): 51, arXiv:1108.4402, Bibcode:2011ApJ...742...51B, doi:10.1088/0004-637X/742/1/51.
- ↑ Marks, Michael; Kroupa, Pavel (August 2010), "Initial conditions for globular clusters and assembly of the old globular cluster population of the Milky Way", Monthly Notices of the Royal Astronomical Society 406 (3): 2000–2012, arXiv:1004.2255, Bibcode:2010MNRAS.406.2000M, doi:10.1111/j.1365-2966.2010.16813.x. Mass is from MPD on Table 1.
- ↑ 5.0 5.1 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, arXiv:1001.4289, Bibcode:2010MNRAS.404.1203F, doi:10.1111/j.1365-2966.2010.16373.x.
External links
- NGC 6712 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- Simbad
- Webda
- NGC 6712
Coordinates: 
18h 53m 04.32s, −08° 42′ 21.5″
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