{{Short description|Star in the constellation Coma Berenices}} {{Use dmy dates|date=June 2018}} {{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=41 Comae Berenices |x=175|y=235 }} | caption = Location of 41 Comae Berenices (circled in red) }} {{Starbox observe | epoch = J2000 | constell = [[Coma Berenices]] | ra = {{RA|13|07|10.72992}}<ref name=GaiaDR3/> | dec = {{DEC|+27|37|29.0554}}<ref name=GaiaDR3/> | appmag_v = {{Val|4.80|0.02}}<ref name=Baines2017/> }} {{Starbox character | type = [[red giant branch]]<ref name=GaiaDR3/> | class = K5-III<ref name=perkins1989/> | b-v = {{Val|1.482|0.003}}<ref name=Anderson2012/> | u-b = | variable = }} {{Starbox astrometry | radial_v = {{val|−15.89|0.13}}<ref name=GaiaDR3/> | prop_mo_ra = +34.155 | prop_mo_dec = −69.539 | pm_footnote = <ref name=GaiaDR3/> | parallax = 8.5989 | p_error = 0.1327 | parallax_footnote = <ref name=GaiaDR3/> | absmag_v = −0.04<ref name=Cardini2005/> }} {{Starbox detail | source = <ref name=Baines2017/> | mass = {{Val|1.21|0.19}} | radius = {{Val|33.75|0.77}} | luminosity = {{Val|323.0|21.7}} | temperature = {{Val|4211|54|fmt=commas}} | gravity = 1.70 | metal_fe = −0.09 | rotational_velocity = 1.8<ref name=DeMedeiros2000/> | age_gyr = {{Val|4.51|1.84}} }} {{Starbox catalog | names = {{odlist | F=36 Com | BD=+28°2185 | FK5=3045 | HD=113996 | HIP=64022 | HR=4954 | SAO=82659 }}<ref name=SIMBAD/> }} {{Starbox reference | Simbad=41+Com | NSTED=HD-113996 }} {{Starbox end}}
'''41 Comae Berenices''' is a single,<ref name=Eggleton2008/> orange-hued [[star]] in the northern [[constellation]] of [[Coma Berenices]]. It is visible to the naked eye, having an [[apparent visual magnitude]] of 4.80.<ref name=Baines2017/> Based upon an annual [[stellar parallax|parallax shift]] of {{Val|8.6|ul=mas}}, it is located around 379 [[light year]]s away. It is moving closer to the Earth with a heliocentric [[radial velocity]] of −16 km/s.<ref name=GaiaDR3/>
At the age of about 4.5 billion years, this is an [[stellar evolution|evolved]] [[giant star]] with a [[stellar classification]] of K5-III,<ref name=perkins1989/> currently on the [[red giant branch]].<ref name=Jeong2018/> It has 1.2 times the [[mass of the Sun]] and, after consuming the hydrogen at its core, has expanded to 34 times the [[Sun's radius]]. The star is radiating 323 times the [[Sun's luminosity]] from its enlarged [[photosphere]] at an [[effective temperature]] of 4,211 K.<ref name=Baines2017/>
In 2017, one planet (HD 113996 b) was found orbiting it via the [[radial velocity method]]. The planet has a mass of at least {{Val|6.3|1.0|ul=Jupiter mass}}, a [[semi-major axis]] of {{Val|1.6|0.1|ul=AU}}, an [[orbital period]] of {{Val|610.2|3.8|u=days}}, and an [[orbital eccentricity|eccentricity]] of {{Val|0.28|0.12}}.<ref name=Jeong2018/><ref name=exoplanet/>
{{Orbitbox planet begin | name = 41 Comae Berenices | table_ref = <ref name=Jeong2018/> }} {{Orbitbox planet | exoplanet = b | mass = {{val|6.3|1.0|p=≥}} | radius = | semimajor = {{val|1.6|0.1}} | period = {{val|610.2|3.8}} | eccentricity = {{val|0.28|0.12}} | inclination = }} {{Orbitbox end}}
==References== <references> <ref name=SIMBAD>{{cite simbad | title=41 Com | access-date=2019-01-07 }}</ref>
<ref name=GaiaDR3>{{Cite Gaia DR3|1460876573902483328}}</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>
<ref name=DeMedeiros2000>{{citation | display-authors=1 | last1=De Medeiros | first1=J. R. | last2=do Nascimento | first2=J. D. Jr. | last3=Sankarankutty | first3=S. | last4=Costa | first4=J. M. | last5=Maia | first5=M. R. G. | title=Rotation and lithium in single giant stars | journal=Astronomy and Astrophysics | postscript=. | volume=363 | pages=239–243 | date=November 2000 | bibcode=2000A&A...363..239D | arxiv=astro-ph/0010273 }}</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=Baines2017>{{citation | title=Fundamental Parameters of 87 Stars from the Navy Precision Optical Interferometer | last1=Baines | first1=E. | last2=Schmitt | first2=H. R. | last3=Zavala | first3=R. T. | last4=Hutter | first4=D. | last5=van Belle | first5=G. T. | display-authors=1 | journal=The Astronomical Journal | volume=155 | issue=1 | pages=30 | year=2017 | bibcode=2018AJ....155...30B | doi=10.3847/1538-3881/aa9d8b | arxiv=1712.08109 | s2cid=119427037 | postscript=. | doi-access=free }}</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=Cardini2005>{{citation | title=Mg II chromospheric radiative loss rates in cool active and quiet stars | last1=Cardini | first1=D. | postscript=. | journal=Astronomy and Astrophysics | volume=430 | pages=303–311 | date=January 2005 | doi=10.1051/0004-6361:20041440 | bibcode=2005A&A...430..303C | arxiv=astro-ph/0409683 | s2cid=12136256 }}</ref>
<ref name=Jeong2018>{{citation | title=Detection of planet candidates around K giants. HD 40956, HD 111591, and HD 113996 | last1=Jeong | first1=G. | last2=Lee | first2=B.-C. | last3=Han | first3=I. | last4=Omiya | first4=M. | last5=Izumiura | first5=H. | last6=Sato | first6=B. | last7=Harakawa | first7=H. | last8=Kambe | first8=E. | last9=Mkrtichian | first9=D. | display-authors=1 | journal=Astronomy & Astrophysics | volume=610 | id=A3 | pages=8 | date=February 2018 | doi=10.1051/0004-6361/201629185 | postscript=. | bibcode=2018A&A...610A...3J | arxiv=1711.07173 | s2cid=119209663 }}</ref>
<ref name=exoplanet>HD 113996 b at the Open Exoplanet Catalogue. Available at https://exoplanet.eu/catalog/hd_113996_b--6676/. Accessed 28 November 2017.</ref> </references>
{{Stars of Coma Berenices}}
{{DEFAULTSORT:41 Comae Berenices}} [[Category:K-type giants]] [[Category:Coma Berenices]] [[Category:Durchmusterung objects|BD+28 2185]] [[Category:Flamsteed objects|Comae Berenices, 41]] [[Category:Henry Draper Catalogue objects|113996]] [[Category:Hipparcos objects|064022]] [[Category:Bright Star Catalogue objects|4954]] [[Category:Planetary systems with one confirmed planet]]