NGC 6316

NGC 6316
NGC 6316 as seen through the Hubble Space Telescope
Observation data (J2000 epoch)
ClassIII[1]
ConstellationOphiuchus
Right ascension17h 16m 37.42s[2]
Declination−28° 08′ 24.0″[2]
Distance36.86 ± 0.98 kly (11.3 ± 0.3 kpc)[3]
Apparent magnitude (V)9.03[2]
Apparent dimensions (V)4.9 × 4.9[1]
Physical characteristics
Metallicity = -0.45[4] -0.87[5] -0.90[3] dex
Estimated age13.1 ± 0.5 Gyr[3]
Notable featuresRelatively metal-rich globular cluster
Other designationsGCl 57, VDBH 219[2]
See also: Globular cluster, List of globular clusters

NGC 6316 is a globular cluster located in the constellation Ophiuchus. Its Shapley-Sawyer Concentration Class is III, meaning that it has a "strong inner core of stars" and was discovered by the German-born British astronomer William Herschel on 24 May 1784.[6] It is at a distance of about 37,000 light years away from the Earth.[3] NGC 6316 has a metallicity of -0.45,[4] although new studies suggest this cluster to be more metal Poor, with a metallicity of -0.87 [5] and -0.9;[3] this means that its ratio of hydrogen/helium to other elements is only 35% that of the Sun, but still enough to be considered a "metal-rich" globular cluster.[7]

  1. ^ a b Hartmut Frommert. "NGC 6316 - Hartmut Frommert - SEDS". SEDS. Retrieved 6 February 2017.
  2. ^ a b c d "NGC 6136". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 6 February 2017.
  3. ^ a b c d e Deras, Dan; Cadelano, Mario; Ferraro, Francesco R.; Lanzoni, Barbara; Pallanca, Cristina (2023). "Digging into the Galactic Bulge: Stellar Population and Structure of the Poorly Studied Cluster NGC 6316". The Astrophysical Journal. 942 (2): 104. arXiv:2212.03649. Bibcode:2023ApJ...942..104D. doi:10.3847/1538-4357/aca9ce. S2CID 254366515.
  4. ^ a b William E. Harris. "Catalog of Parameters for Milky Way Globular Clusters". Retrieved 3 February 2017.
  5. ^ a b Conroy, Charlie; Villaume, alexa; van Dokkum, Pieter G.; Lind, karin (February 2018). "Metal-rich, Metal-poor: Updated Stellar Population Models for Old Stellar Systems". The Astrophysical Journal. 854 (2): 139. arXiv:1801.10185. Bibcode:2018ApJ...854..139C. doi:10.3847/1538-4357/aaab49.
  6. ^ Seligman, Courtney. "NGC 6316 (= GCL 57)". cseligman. Retrieved 4 October 2015.
  7. ^ Layden, Andrew C.; Bowes, Benjamin T.; Welch, Douglas L.; Webb, Tracy M. A. (2003). "Variable Stars in Metal-Rich Globular Clusters. II. NGC 6316". The Astronomical Journal. 126 (1): 255–264. arXiv:astro-ph/0304077. Bibcode:2003AJ....126..255L. doi:10.1086/375651. S2CID 8720908.