NGC 6316

{{Short description|Globular cluster in the constellation of Ophiuchus}}

{{Infobox globular cluster

| name = NGC 6316

| image = File:NGC 6316 HST WFC3.jpg

| caption = NGC 6316 as seen through the Hubble Space Telescope

| credit =

| epoch = J2000

| class = III{{cite web|url=http://spider.seds.org/spider/MWGC/n6316.html|title=NGC 6316 - Hartmut Frommert - SEDS|work=SEDS|author=Hartmut Frommert|access-date=6 February 2017}}

| constellation = Ophiuchus

| ra = {{RA|17|16|37.42}}{{cite simbad|title=NGC 6136|accessdate=6 February 2017}}

| dec = {{DEC|-28|08|24.0}}

| dist_ly = {{cvt|11.3|±|0.3|kpc|kly|order=flip|lk=on}}{{cite journal |doi=10.3847/1538-4357/aca9ce |title=Digging into the Galactic Bulge: Stellar Population and Structure of the Poorly Studied Cluster NGC 6316 |year=2023 |last1=Deras |first1=Dan |last2=Cadelano |first2=Mario |last3=Ferraro |first3=Francesco R. |last4=Lanzoni |first4=Barbara |last5=Pallanca |first5=Cristina |journal=The Astrophysical Journal |volume=942 |issue=2 |page=104 |arxiv=2212.03649 |bibcode=2023ApJ...942..104D |s2cid=254366515 |doi-access=free }}

| appmag_v =9.03

| size_v = 4.9{{prime}} × 4.9{{prime}}

| mass_msol =

| mass_kg =

| v_hb =

| metal_fe = -0.45{{cite web|title=Catalog of Parameters for Milky Way Globular Clusters|url=http://physwww.mcmaster.ca/~harris/mwgc.dat|author1=William E. Harris|access-date=3 February 2017}} -0.87{{cite journal |last1=Conroy |first1=Charlie |last2=Villaume |first2=alexa |last3=van Dokkum |first3=Pieter G. |last4=Lind |first4=karin |title=Metal-rich, Metal-poor: Updated Stellar Population Models for Old Stellar Systems |journal=The Astrophysical Journal |date=February 2018 |volume=854 |issue=2 |page=139 |doi=10.3847/1538-4357/aaab49 |doi-access=free |arxiv=1801.10185 |bibcode=2018ApJ...854..139C |ref=Conroy2018}} -0.90

| metal_z =

| age = 13.1 ± 0.5 Gyr

| notes = Relatively metal-rich globular cluster

| names =GCl 57, VDBH 219

|image size=250}}

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.{{cite web|last=Seligman|first=Courtney|title=NGC 6316 (= GCL 57)|url=http://cseligman.com/text/atlas/ngc63.htm#6316|website=cseligman|access-date=4 October 2015}} It is at a distance of about 37,000 light years away from the Earth. NGC 6316 has a metallicity of -0.45, although new studies suggest this cluster to be more metal Poor, with a metallicity of -0.87 and -0.9; 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.{{cite journal|title=Variable Stars in Metal-Rich Globular Clusters. II. NGC 6316|author1=Layden, Andrew C.|author2=Bowes, Benjamin T.|author3=Welch, Douglas L.|author4=Webb, Tracy M. A.|journal=The Astronomical Journal|volume=126|issue=1|pages=255–264|date=2003|bibcode=2003AJ....126..255L|doi=10.1086/375651|arxiv=astro-ph/0304077|s2cid=8720908 }}