NGC 6712
| NGC 6712 | |
|---|---|
 NGC 6712, by HST | |
| 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] |
| Apparent dimensions (V) | 7.2' |
| 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 |
![{\displaystyle {\begin{smallmatrix}\left[{\ce {Fe}}/{\ce {H}}\right]\end{smallmatrix}}}](https://wikimedia.org/enwiki/api/rest_v1/media/math/render/svg/4c0821bd80891e071c08e7c7ee8e022baedf522c)
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 describe 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 (849): 11–14, Bibcode:1927BHarO.849...11S.
- ^ a b c d "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.
{{citation}}: CS1 maint: unflagged free DOI (link) Mass is from MPD on Table 1. - ^ a b 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.
{{citation}}: CS1 maint: unflagged free DOI (link)
External links
- NGC 6712 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- Simbad
- Webda
- NGC 6712
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