41 Comae Berenices
{{Short description|Star in the constellation Coma Berenices}}
{{Use dmy dates|date=June 2018}}
{{Starbox begin
| name = 41 Comae Berenices
}}
{{Starbox observe
| epoch = J2000
| constell = Coma Berenices
| dec = {{DEC|+27|37|29.0554}}
| appmag_v = {{Val|4.80|0.02}}
}}
{{Starbox character
| type = giant star
| u-b =
| variable =
}}
{{Starbox astrometry
| radial_v = {{val|−15.89|0.13}}
| prop_mo_ra = +34.155
| prop_mo_dec = −69.539
| parallax = 8.5989
| p_error = 0.1327
}}
{{Starbox detail
| 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
| 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 }}
}}
{{Starbox reference
| Simbad=41+Com
}}
{{Starbox end}}
41 Comae Berenices is a single, 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. Based upon an annual parallax shift of {{Val|8.6|ul=mas}}, it is located around 379 light years away. It is moving closer to the Earth with a heliocentric radial velocity of −16 km/s.
At the age of about 4.5 billion years, this is an evolved giant star with a stellar classification of K5-III, currently on the red giant branch. 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.
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 eccentricity of {{Val|0.28|0.12}}.
{{Orbitbox planet begin
| name = 41 Comae Berenices
}}
{{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
{{reflist|refs=
{{cite simbad | title=41 Com | access-date=2019-01-07 }}
{{Cite Gaia DR3|1460876573902483328}}
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| bibcode=2000A&A...363..239D | arxiv=astro-ph/0010273 }}
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| bibcode=2018AJ....155...30B | doi=10.3847/1538-3881/aa9d8b
| arxiv=1712.08109 | s2cid=119427037 | postscript=. | doi-access=free }}
| title=The Perkins catalog of revised MK types for the cooler stars
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| journal=Astrophysical Journal Supplement Series
| volume=71 | pages=245 | year=1989 | postscript=.
| bibcode=1989ApJS...71..245K | doi=10.1086/191373 }}
| 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 }}
| 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 }}
}}
{{Stars of Coma Berenices}}
{{DEFAULTSORT:41 Comae Berenices}}