}}{{Starbox reference
| Simbad=41+Com
}}{{Starbox end}}41 Comae Berenices is a single,[14] 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.[3] Based upon an annual parallax shift of {{Val|9.8|ul=mas}},[1] it is located around 331 light years away. It is moving closer to the Earth with a heliocentric radial velocity of −17 km/s.[6]At the age of about 4.5 billion years, this is an evolved giant star with a stellar classification of K5-III,[4] currently on the red giant branch.[19] 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.[3]
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}}.[19][22]
References
1. ^1 2 {{Cite Gaia DR2|3937690377058804480}}
2. ^1 2 3 4 5 6 {{citation | title=Validation of the new Hipparcos reduction | last1=van Leeuwen | first1=F. | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | date=2007 | arxiv=0708.1752 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | postscript=. }}
3. ^1 {{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 | postscript=. }}
4. ^1 {{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 }}
5. ^1 {{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 | bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | postscript=. }}
6. ^1 2 3 4 {{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 | postscript=. }}
7. ^1 2 {{citation | title=The Perkins catalog of revised MK types for the cooler stars | author1=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 }}
8. ^1 {{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 }}
9. ^1 2 {{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 }}
10. ^1 HD 113996 b at the Open Exoplanet Catalogue. Available at http://exoplanet.eu/catalog/hd_113996_b/. Accessed 28 November 2017.