{{Short description|Star in the constellation Coma Berenices}} {{Starbox begin}} {{Starbox image | image ={{Location mark |image=Coma Berenices constellation map.svg |float=center |position=right |width=280 |mark=Red circle.svg |mark_width=8 |mark_link=14 Comae Berenices |x=480|y=258 }} | caption = Location of 14 Com (circled) }} {{Starbox observe | epoch = J2000 | ra = {{RA|12|26|24.06442}}<ref name=GaiaDR3/> | dec = {{DEC|+27|16|05.6598}}<ref name=GaiaDR3/> | appmag_v = 4.95<ref name=ducati2002/> | constell = [[Coma Berenices]] }} {{Starbox character | type = [[subgiant]]<ref name=GaiaDR3/> | class = F0p<ref name=Elazm1993/><ref name=Belle2012/> | b-v = {{Val|+0.277|0.018}}<ref name=Anderson2012/> | u-b = +0.18<ref name=ducati2002/> | variable = }} {{Starbox astrometry | radial_v = −2.20<ref name=Gontcharov2006/> | prop_mo_ra = −15.874<ref name=GaiaDR3/> | prop_mo_dec = −11.784<ref name=GaiaDR3/> | parallax = 11.2826 | p_error = 0.1085 | parallax_footnote = <ref name=GaiaDR3/> | absmag_v = +0.35<ref name=pizzolato/> }} {{Starbox detail | mass = 1.6<ref name=tic/> | radius = 4.8<ref name=tic/> | luminosity = 56<ref name=tic/> | temperature = 7,170<ref name=tic/> | gravity = 3.27<ref name=tic/> | metal_fe = | rotation = 1.272 days<ref name=balona2022/> | rotational_velocity = 226<ref name=pizzolato/> | age_myr = 500<ref name=GaiaDR3/> }} {{Starbox catalog | names = {{odlist | F=14 Com | BD=+28°2115 | FK5=2997 | HD=108283 | HIP=60697 | HR=4733 | SAO=82310 | AAVSO=1221+27 }}<ref name=SIMBAD/> }} {{Starbox reference | Simbad=14+Com }} {{Starbox end}}
'''14 Comae Berenices''' is a single<ref name=Elazm1993/> [[star]] in the northern [[constellation]] of [[Coma Berenices]], and is the second brightest<ref name=dominy/> member of the [[Coma Star Cluster]].<ref name=Elazm1993/> It is a faint star but visible to the naked eye with an [[apparent visual magnitude]] of 4.95.<ref name=ducati2002/> [[Stellar parallax|Parallax]] measurements place the star at a distance of about 289 [[light year]]s.<ref name=GaiaDR3/>
The [[stellar spectrum|spectrum]] of this star is [[peculiar star|peculiar]] and it has been assigned a number of different [[stellar classification]]s: A5, F0p, {{nowrap|F0 III Sr}}, F0 vp,<ref name=Elazm1993/> {{nowrap|F1 IV: np Sr shell}},<ref name=Anderson2012/> {{nowrap|A9 IV np Sr II}},<ref name=Murphy2015/> F1 IV,<ref name=gray2001/> and {{nowrap|A9 V + shell}}.<ref name=Abt1999/> Abt & Morrell (1995) designated this a [[Lambda Boötis star]] but this was later refuted.<ref name=Murphy2015/> No [[stellar magnetic field|surface magnetic field]] has been detected on 14 Comae Berenices.<ref name=Kudryavtsev2006/>
14 Comae Berenices is a well-known<ref name=Abt1999/> [[shell star]] with a high rate of spin, showing a [[projected rotational velocity]] of 226 km/s.<ref name=pizzolato/> This is giving the star an [[oblate spheroid|oblate]] shape with an [[equatorial bulge]] that is 12% larger than the polar radius.<ref name=Belle2012/> It is radiating 56 times the [[Sun's luminosity]] from its [[photosphere]] at an [[effective temperature]] of {{val|fmt=commas|7170|ul=K}}.<ref name=tic/>
==References== <references> <ref name=SIMBAD>{{cite simbad | title=14 Com | access-date=2019-01-02 }}</ref>
<ref name=GaiaDR3>{{Cite Gaia DR3|4009103588563247104}}</ref>
<ref name=tic>{{cite journal |last1=Stassun |first1=Keivan G. |last2=Oelkers |first2=Ryan J. |last3=Paegert |first3=Martin |last4=Torres |first4=Guillermo |last5=Pepper |first5=Joshua |last6=De Lee |first6=Nathan |last7=Collins |first7=Kevin |last8=Latham |first8=David W. |last9=Muirhead |first9=Philip S. |last10=Chittidi |first10=Jay |last11=Rojas-Ayala |first11=Bárbara |last12=Fleming |first12=Scott W. |last13=Rose |first13=Mark E. |last14=Tenenbaum |first14=Peter |last15=Ting |first15=Eric B. |last16=Kane |first16=Stephen R. |last17=Barclay |first17=Thomas |last18=Bean |first18=Jacob L. |last19=Brassuer |first19=C. E. |last20=Charbonneau |first20=David |last21=Ge |first21=Jian |last22=Lissauer |first22=Jack J. |last23=Mann |first23=Andrew W. |last24=McLean |first24=Brian |last25=Mullally |first25=Susan |last26=Narita |first26=Norio |last27=Plavchan |first27=Peter |last28=Ricker |first28=George R. |last29=Sasselov |first29=Dimitar |last30=Seager |first30=S. |display-authors=1 |title=The Revised TESS Input Catalog and Candidate Target List |journal=The Astronomical Journal |date=2019 |volume=158 |issue=4 |page=138 |doi=10.3847/1538-3881/ab3467 |doi-access=free |arxiv=1905.10694 |bibcode=2019AJ....158..138S }}</ref>
<ref name=balona2022>{{cite journal |last1=Balona |first1=L. A. |title=Rapidly oscillating TESS A-F main-sequence stars: Are the roAp stars a distinct class? |journal=Monthly Notices of the Royal Astronomical Society |date=2022 |volume=510 |issue=4 |page=5743 |doi=10.1093/mnras/stac011 |doi-access=free |arxiv=2109.02246 |bibcode=2022MNRAS.510.5743B }}</ref>
<ref name=Anderson2012>{{cite journal | title=XHIP: An extended hipparcos compilation | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | journal=Astronomy Letters | volume=38 | issue=5 | pages=331 | year=2012 | bibcode=2012AstL...38..331A | arxiv=1108.4971 | doi=10.1134/S1063773712050015 | s2cid=119257644 }}</ref>
<ref name=Belle2012>{{citation | last1=van Belle | first1=Gerard T. | title=Interferometric observations of rapidly rotating stars | journal=The Astronomy and Astrophysics Review | volume=20 | issue=1 | page=51 | date=March 2012 | doi=10.1007/s00159-012-0051-2 | bibcode=2012A&ARv..20...51V | arxiv=1204.2572 | s2cid=119273474 }}</ref>
<ref name=Murphy2015>{{citation | title=An Evaluation of the Membership Probability of 212 λ Boo Stars. I. A Catalogue | last1=Murphy | first1=Simon J. | last2=Corbally | first2=Christopher J. | last3=Gray | first3=Richard O. | last4=Cheng | first4=Kwang-Ping | last5=Neff | first5=James E. | last6=Koen | first6=Chris | last7=Kuehn | first7=Charles A. | last8=Newsome | first8=Ian | last9=Riggs | first9=Quinlin | display-authors=1 | journal=Publications of the Astronomical Society of Australia | volume=32 | id=e036 | pages=43 | date=October 2015 | doi=10.1017/pasa.2015.34 | bibcode=2015PASA...32...36M | arxiv=1508.03633 | s2cid=59405545 }}</ref>
<ref name=Abt1999>{{citation | title=Binaries in the Praesepe and Coma Star Clusters and Their Implications for Binary Evolution | last1=Abt | first1=Helmut A. | last2=Willmarth | first2=Daryl W. | journal=The Astrophysical Journal | volume=521 | issue=2 | pages=682–690 | date=August 1999 | doi=10.1086/307569 | bibcode=1999ApJ...521..682A | s2cid=119772785 | doi-access=free }}</ref>
<ref name=Elazm1993>{{citation | title=The composite spectrum of the A type star 14 Comae | last1=Abou Elazm | first1=M. S. | journal=Astrophysics and Space Science | volume=208 | issue=1 | pages=1–4 | date=October 1993 | doi=10.1007/BF00658127 | bibcode=1993Ap&SS.208....1A | s2cid=123520053 }}</ref>
<ref name=dominy>{{cite journal | last1=Dominy | first1=J. F. | last2=Smith | first2=M. A. | title=A spectroscopic study of 14 Comae and other A-type shell stars | journal=Astrophysical Journal | volume=217 | page=494 | year=1977 | bibcode=1977ApJ...217..494D | doi=10.1086/155598 }}</ref>
<ref name=pizzolato>{{cite journal | last1=Pizzolato | first1=N. | last2=Maggio | first2=A. | last3=Sciortino | first3=S. | display-authors=1 | title=Evolution of X-ray activity of 1-3 Msun late-type stars in early post-main-sequence phases | journal=Astronomy and Astrophysics | volume=361 | pages=614 | year=2000 | bibcode=2000A&A...361..614P }}</ref>
<ref name=Gontcharov2006>{{cite journal | last1=Gontcharov | first1=G. A. | title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system | journal=Astronomy Letters | volume=32 | issue=11 | pages=759–771 | year=2006 | bibcode=2006AstL...32..759G | arxiv=1606.08053 | doi=10.1134/S1063773706110065 | s2cid=119231169 }}</ref>
<ref name=gray2001>{{cite journal | last1=Gray | first1=R. O. | last2=Napier | first2=M. G. | last3=Winkler | first3=L. I. | display-authors=1 | title=The Physical Basis of Luminosity Classification in the Late A-, F-, and Early G-Type Stars. I. Precise Spectral Types for 372 Stars | journal=The Astronomical Journal | volume=121 | issue=4 | page=2148 | year=2001 | bibcode=2001AJ....121.2148G | doi=10.1086/319956 | doi-access= }}</ref>
<ref name=ducati2002>{{cite journal | last1=Ducati | first1=J. R. | title=VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system | journal=CDS/ADC Collection of Electronic Catalogues | volume=2237 | year=2002 | bibcode=2002yCat.2237....0D }}</ref>
<ref name=Kudryavtsev2006>{{cite journal | display-authors=1 | title=New magnetic chemically peculiar stars | last1=Kudryavtsev | first1=D. O. | last2=Romanyuk | first2=I. I. | last3=Elkin | first3=V. G. | last4=Paunzen | first4=E. | journal=Monthly Notices of the Royal Astronomical Society | volume=372 | issue=4 | pages=1804–1828 | date=November 2006 | doi=10.1111/j.1365-2966.2006.10994.x | bibcode=2006MNRAS.372.1804K | doi-access=free }}</ref> </references>
{{Stars of Coma Berenices}}
[[Category:F-type subgiants]] [[Category:Shell stars]] [[Category:Ap stars]] [[Category:Coma Berenices]] [[Category:Durchmusterung objects|BD+28 2115]] [[Category:Flamsteed objects|Comae Berenices, 14]] [[Category:Henry Draper Catalogue objects|108283]] [[Category:Hipparcos objects|060697]] [[Category:Bright Star Catalogue objects|4733]]