{{Short description|Open cluster in the constellation Centaurus}} {{Infobox cluster | name = NGC 5316 | image = File:NGC 5316.png | caption = NGC 5316 | credit = | epoch = [[Epoch (astronomy)#Julian years and J2000|J2000]] | constellation = [[Centaurus (constellation)|Centaurus]] | ra = {{RA|13|53|57}}<ref name="simbad"> {{cite simbad | title=NGC 5316 | access-date=2017-08-19 }}</ref> | dec = {{DEC|-61|52|06}}<ref name="simbad"/> | dist_ly = 3,960 [[light year|ly]] | dist_pc = 1,215 [[parsec|pc]]<ref>[https://www.univie.ac.at/webda/cgi-bin/ocl_page.cgi?dirname=ngc5316 WEBDA page for open cluster NGC 5316]</ref> | appmag_v = 6.0 <ref name="simbad"/> | size_v =15'<ref name="Kharchenko2013">{{cite journal|last1=Kharchenko|first1=N. V.|last2=Piskunov|first2=A. E.|last3=Schilbach|first3=E.|last4=Röser|first4=S.|last5=Scholz|first5=R.-D.|title=Global survey of star clusters in the Milky Way|journal=Astronomy & Astrophysics|date=3 October 2013|volume=558|pages=A53|doi=10.1051/0004-6361/201322302|url=ftp://cdsarc.u-strasbg.fr/pub/cats/J/A%2BA/558/A53/catalog.dat|arxiv = 1308.5822 |bibcode = 2013A&A...558A..53K |archive-url=https://web.archive.org/web/20200312135436/ftp://cdsarc.u-strasbg.fr/pub/cats/J/A+A/558/A53/catalog.dat|archive-date=2020-03-12|url-status=dead|s2cid=118548517 }}</ref> | mass_msol = 1,500<ref name=Piskunov2008>{{Cite FTP |last1=Piskunov|first1=A. E.|last2=Schilbach|first2=E.|last3=Kharchenko|first3=N. V.|last4=Röser|first4=S.|last5=Scholz|first5=R.-D.|title=Tidal radii and masses of open clusters|date=6 November 2007|volume=477|issue=1|pages=165–172|doi=10.1051/0004-6361:20078525|url=ftp://cdsarc.u-strasbg.fr/pub/cats/J/A%2BA/477/165/table.dat|bibcode = 2008A&A...477..165P |server=Astronomy & Astrophysics|url-status=dead|doi-access=free}}</ref> | age = 100 million years<ref name="Carraro2012">{{cite journal|last1=Carraro|first1=Giovanni|last2=Seleznev|first2=Anton F.|title=UBVI CCD photometry and star counts in nine inner disc Galactic star clusters|journal=Monthly Notices of the Royal Astronomical Society|date=21 February 2012|volume=419|issue=4|pages=3608–3623|doi=10.1111/j.1365-2966.2011.20010.x|doi-access=free |arxiv = 1110.3011 |bibcode = 2012MNRAS.419.3608C |s2cid=118542242 }}</ref> | notes = | names = Collinder 279, Melotte 122 }} '''NGC 5316''' is an [[open cluster]] in the constellation [[Centaurus (constellation)|Centaurus]]. It was discovered by [[James Dunlop]] in 1826. Located approximately 4,000 [[light year]]s away from Earth, it is located in the [[Carina-Sagittarius arm]].<ref name="Carraro2012"/>
There are 570 probable member stars within the angular radius of the cluster and 262 within the central part of the cluster. The tidal radius of the cluster is 6.0 - 8.1 parsecs (19 - 26 light years) and represents the average outer limit of NGC 5316, beyond which a star is unlikely to remain gravitationally bound to the cluster core.<ref name="Kharchenko2013"/> The brightest member of the cluster (lucida) is star No. 31 (mag. 9.40).<ref name=Pedreros>{{cite journal|last1=Pedreros|first1=Mario|title=Photometric study of the Southern open clusters NGC 5316 and NGC 6214|journal=The Astronomical Journal|date=November 1987|volume=94|pages=1237|doi=10.1086/114559|bibcode = 1987AJ.....94.1237P }}</ref> Star 31 has significantly more [[barium]] than the rest of the group and the Ba II line is visually stronger than the rest of the cluster. The [[Turnoff point|turn-off mass]] of the cluster is estimated to be at 5.0 {{solar mass|link=yes}}.<ref name="Drazdauskas">{{cite journal|last1=Drazdauskas|first1=Arnas|last2=Tautvaišienė|first2=Gražina|author-link2=Gražina Tautvaišienė|last3=Smiljanic|first3=Rodolfo|last4=Bagdonas|first4=Vilius|last5=Chorniy|first5=Yuriy|title=Chemical composition of evolved stars in the young open clusters NGC 4609 and NGC 5316|journal=Monthly Notices of the Royal Astronomical Society|date=11 October 2016|volume=462|issue=1|pages=794–803|doi=10.1093/mnras/stw1701|doi-access=free |arxiv=1608.08375|bibcode = 2016MNRAS.462..794D }}</ref> The hottest stars of the cluster are of spectral type B5–B7.<ref name="Carraro2012"/> NGC 5316 has [[metallicity]] nearly the same as the solar one ([Fe/H] = −0.02 ± 0.05).<ref name="Drazdauskas"/>
The age of the cluster has been estimated to be from as low as 51 myr (by the first [[Photometry (astronomy)|photometric study]] of the cluster, in 1968, by Lindoff) to as high as 195 myr (by Battinelli & Capuzzo-Dolcetta, 1991).<ref name="Drazdauskas"/> Pedreros et al. estimated its age to be (1.24 ± 0.15) × 10<sup>8</sup> years from ZAMS fitting the cluster (Pedreros, 1987)<ref name=Pedreros/> and the UBVI [[Charge-coupled device|CCD]] photometric study of the cluster by Carraro et al. estimated its age to be 100 ± 10 million years.<ref name="Carraro2012"/>
== References == {{reflist}}
== External links == * {{commonscat-inline}} {{wikiSky}}
{{Stars of Centaurus}} {{Ngc55}}
{{DEFAULTSORT:NGC 5316}} [[Category:NGC objects|5316]] [[Category:Centaurus]] [[Category:Open clusters]]