16 Comae Berenices

{{Short description|Star in the constellation Coma Berenices}} {{Starbox begin}} {{Starbox observe | epoch = J2000 | ra = {{RA|12|26|59.29615}}<ref name=GaiaDR2/> | dec = {{DEC|+26|49|32.5273}}<ref name=GaiaDR2/> | appmag_v = 4.96<ref name=Gebran2008/> | constell = [[Coma Berenices]] }} {{Starbox character | type = main sequence<ref name=zorec2012/> | class = A4 V<ref name=zorec2012/> | b-v = | u-b = | variable = }} {{Starbox astrometry | radial_v = {{Val|+0.40|0.70}}<ref name=deBruijne2012/> | prop_mo_ra = −11.456<ref name=GaiaDR2/> | prop_mo_dec = −9.220<ref name=GaiaDR2/> | parallax = 11.6745 | p_error = 0.2116 | parallax_footnote = <ref name=GaiaDR2/> | absmag_v = }} {{Starbox detail | source = <ref name=zorec2012/> | mass = {{Val|2.54|0.03}} | radius = 3.71<ref name=Cotten2016/> | luminosity = {{Val|68.6|3.5|3.3}} | temperature = {{Val|8299|57|58|fmt=commas}} | gravity = 3.67<ref name=David2015/> | metal_fe = −0.3<ref name=gebran2016/> | rotational_velocity = 80 | age_myr = 310<ref name=David2015/> }} {{Starbox catalog | names = {{odlist | F=16 Com | BD=+27°2134 | FK5=2997 | HD=108382 | HIP=60746 | HR=4738 | SAO=82314 }}<ref name=SIMBAD/> }} {{Starbox reference | Simbad=16+Com }} {{Starbox end}}

'''16 Comae Berenices''' is a single<ref name=Eggleton2008/> [[star]] in the northern [[constellation]] of [[Coma Berenices]]. ''16 Comae Berenices'' is the [[Flamsteed designation]]. It is a member of the [[Coma Star Cluster]] and is visible to the naked eye with an [[apparent visual magnitude]] of 4.96.<ref name=Gebran2008/> Based upon an annual [[stellar parallax|parallax shift]] of {{Val|11.7|ul=mas}},<ref name=GaiaDR2/> it is located about 279 [[light year]]s away.

This is a [[chemically-peculiar star|chemically-peculiar]] [[A-type main-sequence star]] with a [[stellar classification]] of A4 V.<ref name=zorec2012/> It displays an [[infrared excess]], suggesting the presence of an orbiting [[debris disk]] at a mean distance of {{Val|18.2|ul=AU}} with a temperature of {{Val|180|u=K}}.<ref name=Cotten2016/> 16 Com has 2.54<ref name=zorec2012/> times the [[mass of the Sun]] and 3.71<ref name=Cotten2016/> times the [[Sun's radius]]. The star is 310<ref name=David2015/> million years old with a [[projected rotational velocity]] of 80 km/s.<ref name=zorec2012/> It is radiating 67 times the [[Sun's luminosity]] from its [[photosphere]] at an [[effective temperature]] of 8,299 K.<ref name=zorec2012/>

==References== <references> <ref name=SIMBAD>{{cite simbad | title=16 Com | access-date=2019-01-05 }}</ref>

<ref name=Eggleton2008>{{citation | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | title=A catalogue of multiplicity among bright stellar systems | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869–879 | date=September 2008 | doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | s2cid=14878976 | postscript=. }}</ref>

<ref name=Gebran2008>{{citation | last1=Gebran | first1=M. | last2=Monier | first2=R. | last3=Richard | first3=O. | display-authors=1 | title=Chemical composition of A and F dwarf members of the Coma Berenices open cluster | journal=Astronomy and Astrophysics | volume=479 | issue=1 | date=February 2008 | pages=189–206 | doi=10.1051/0004-6361:20078807 | postscript=. | bibcode=2008A&A...479..189G | arxiv=0712.0244 | s2cid=118369727 }}</ref>

<ref name=gebran2016>{{citation | last1=Gebran | first1=M. | last2=Farah | first2=W. | last3=Paletou | first3=F. | last4=Monier | first4=R. | last5=Watson | first5=V. | display-authors=1 | title=A new method for the inversion of atmospheric parameters of A/Am stars | journal=Astronomy & Astrophysics | volume=589 | pages=A83 | year=2016 | doi=10.1051/0004-6361/201528052 | postscript=. | bibcode=2016A&A...589A..83G | arxiv=1603.01146 | s2cid=118549566 }}</ref>

<ref name=zorec2012>{{citation | last1=Zorec | first1=J. | last2=Royer | first2=F. | last3=Asplund | first3=Martin | last4=Cassisi | first4=Santi | last5=Ramirez | first5=Ivan | last6=Melendez | first6=Jorge | last7=Bensby | first7=Thomas | last8=Feltzing | first8=Sofia | title=Rotational velocities of A-type stars. IV. Evolution of rotational velocities | display-authors=1 | journal=Astronomy and Astrophysics | volume=537 | pages=A120 | year=2012 | postscript=. | arxiv=1201.2052 | bibcode=2012A&A...537A.120Z | doi=10.1051/0004-6361/201117691 | s2cid=55586789 }}</ref>

<ref name=Cotten2016>{{citation | title=A Comprehensive Census of Nearby Infrared Excess Stars | last1=Cotten | first1=Tara H. | last2=Song | first2=Inseok | journal=The Astrophysical Journal Supplement Series | volume=225 | issue=1 | id=15 | pages=24 | date=July 2016 | doi=10.3847/0067-0049/225/1/15 | bibcode=2016ApJS..225...15C | arxiv=1606.01134 | s2cid=118438871 | postscript=. | doi-access=free }}</ref>

<ref name=David2015>{{citation | last1=David | first1=Trevor J. | last2=Hillenbrand | first2=Lynne A. | title=The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets | journal=The Astrophysical Journal | volume=804 | issue=2 | pages=146 | year=2015 | bibcode=2015ApJ...804..146D | doi=10.1088/0004-637X/804/2/146 | arxiv=1501.03154 | s2cid=33401607 | postscript=. }}</ref>

<ref name=deBruijne2012>{{citation | last1=de Bruijne | first1=J. H. J. | last2=Eilers | first2=A.-C. | title=Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project | journal=Astronomy & Astrophysics | volume=546 | id=A61 | pages=14 | date=October 2012 | doi=10.1051/0004-6361/201219219 | bibcode=2012A&A...546A..61D | arxiv=1208.3048 | s2cid=59451347 | postscript=. }}</ref> </references>

[[Category:A-type main-sequence stars]] [[Category:Circumstellar disks]] [[Category:Coma Berenices]] [[Category:Flamsteed objects|Comae Berenices, 16]] [[Category:Durchmusterung objects]] [[Category:Henry Draper Catalogue objects|108382]] [[Category:Hipparcos objects|060746]] [[Category:Bright Star Catalogue objects|4738]]