{{Short description|Star in the constellation Coma Berenices}} {{Starbox begin}} {{Starbox image | image = {{Location mark |image=Coma Berenices constellation map.svg|alt=|float=center|width=280 |label=|position=right |mark=Red circle.svg|mark_width=10|mark_link=36 Comae Berenices |x=218|y=582 }} | caption = Location of 36 Comae Berenices (circled in red) }} {{Starbox observe | epoch = J2000 | constell = [[Coma Berenices]] | ra = {{RA|12|58|55.44277}}<ref name=GaiaDR2/> | dec = {{DEC|+17|24|33.9898}}<ref name=GaiaDR2/> | appmag_v = 4.76<ref name=Anderson2012/> }} {{Starbox character | type = asymptotic giant branch | class = M0.5 III<ref name=perkins1989/> | b-v = 1.556<ref name=Massarotti2008/> | u-b = | variable = }} {{Starbox astrometry | radial_v = {{Val|−1.49|0.27}}<ref name=Massarotti2008/> | prop_mo_ra = −37.488<ref name=GaiaDR2/> | prop_mo_dec = +33.982<ref name=GaiaDR2/> | parallax = 9.3472 | p_error = 0.2157 | parallax_footnote = <ref name=GaiaDR2/> | absmag_v = −0.22<ref name=Anderson2012/> }} {{Starbox detail | source = <ref name=Massarotti2008/> | mass = | radius = 43 | luminosity = 372 | temperature = {{Val|3890|20|fmt=commas}} | gravity = 1.0 | metal_fe = | rotational_velocity = 5.8 | age_myr = }} {{Starbox catalog | names = {{odlist | F=36 Com | BD=+18°2682 | FK5=3036 | HD=112769 | HIP=63355 | HR=4920 | SAO=100357 }}<ref name=SIMBAD/> }} {{Starbox reference | Simbad=36+Com }} {{Starbox end}}
'''36 Comae Berenices''' is a single<ref name=Eggleton2008/> [[star]] in the northern [[constellation]] of [[Coma Berenices]]. It is faintly visible to the naked eye with an [[apparent visual magnitude]] of 4.76.<ref name=Anderson2012/> The distance to this star, as determined from an annual [[stellar parallax|parallax shift]] of {{Val|9.3|ul=mas}},<ref name=GaiaDR2/> is 349 [[light year]]s. It is moving closer to the Earth with a heliocentric [[radial velocity]] of −1.5 km/s.<ref name=Massarotti2008/>
This is an [[stellar evolution|evolved]] [[red giant]] star with a [[stellar classification]] of M0.5 III,<ref name=perkins1989/> currently on the [[asymptotic giant branch]] of the [[Hertzsprung–Russell diagram]].<ref name=eggen1992/> This indicates it has consumed the hydrogen at its center and is now generating energy through [[hydrogen fusion|hydrogen]] and [[helium fusion]] along shells surrounding an inert carbon and oxygen [[stellar core|core]]. It has expanded to 43 times the [[radius of the Sun]] and is radiating 372 times the [[Sun's luminosity]] from its [[photosphere]] at an [[effective temperature]] of 3,890 K.<ref name=Massarotti2008/>
==References== <references> <ref name=SIMBAD>{{cite simbad | title=36 Com | access-date=2019-01-06 }}</ref>
<ref name=GaiaDR2>{{Cite Gaia DR2|3937690377058804480}}</ref>
<ref name=perkins1989>{{citation | title=The Perkins catalog of revised MK types for the cooler stars | last1=Keenan | first1=Philip C. | last2=McNeil | first2=Raymond C. | journal=Astrophysical Journal Supplement Series | volume=71 | pages=245 | year=1989 | postscript=. | bibcode=1989ApJS...71..245K | doi=10.1086/191373 }}</ref>
<ref name=Massarotti2008>{{citation | display-authors=1 | last1=Massarotti | first1=Alessandro | last2=Latham | first2=David W. | last3=Stefanik | first3=Robert P. | last4=Fogel | first4=Jeffrey | title=Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity | journal=The Astronomical Journal | postscript=. | volume=135 | issue=1 | pages=209–231 | date=January 2008 | doi=10.1088/0004-6256/135/1/209 | bibcode=2008AJ....135..209M | doi-access=free }}</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=eggen1992>{{citation | title=Asymptotic giant branch stars near the sun | last1=Eggen | first1=O. J. | journal=The Astronomical Journal | volume=104| pages=275 | year=1992 | bibcode=1992AJ....104..275E | doi=10.1086/116239 | postscript=. }}</ref>
<ref name=Anderson2012>{{citation | 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 | doi=10.1134/S1063773712050015 | arxiv=1108.4971 | s2cid=119257644 | postscript=. }}</ref> </references>
{{Stars of Coma Berenices}}
[[Category:M-type giants]] [[Category:Coma Berenices]] [[Category:Durchmusterung objects|BD+18 2682]] [[Category:Flamsteed objects|Comae Berenices, 36]] [[Category:Henry Draper Catalogue objects|112769]] [[Category:Hipparcos objects|063355]] [[Category:Bright Star Catalogue objects|4920]]