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'''Gliese 686''' (GJ 686 / HIP 86287 / LHS 452)<ref name="SIMBAD1">{{cite simbad|title=LHS 452|accessdate=2019-09-02}}</ref> is a ] in the constellation of ], with an ] +9.577.<ref name=Affer/> Although it is close to the ] - at 26.5 ] - it is not the closest known star in its constellation, since ] is 20.9 light years away.<ref name="closeststars">{{cite web|url=http://www.closeststars.com/|website=closeststars.com|title=Closest stars|accessdate=2019-03-31}}</ref> The closest system to this star is the bright ], at 4.5 light years. They are followed by ] and ], at 7.2 and 7.6 light years respectively.<ref name="ISDB">{{cite web|url=http://www.stellar-database.com/Scripts/find_neighbors.exe?ID=122400&ly=15|website=stellar-database.com|title=Stars within 15 light-years of Bonner Durchmusterung +18°3421 (The Internet Stellar Database)|accessdate=2019-03-31}}</ref> |
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'''Gliese 686''' (GJ 686 / HIP 86287 / LHS 452)<ref name="SIMBAD1">{{cite simbad|title=LHS 452|accessdate=2019-09-02}}</ref> is a ] in the constellation of ], with an ] +9.577.<ref name=Affer/> Although it is close to the ] - at 26.5 ] - it is not the closest known star in its constellation, since ] is 20.9 light years away.<ref name="closeststars">{{cite web|url=http://www.closeststars.com/|website=closeststars.com|title=Closest stars|accessdate=2019-03-31}}</ref> The closest system to this star is the bright ], at 4.5 light years. They are followed by ] and ], at 7.2 and 7.6 light years respectively.<ref name="ISDB">{{cite web|url=http://www.stellar-database.com/Scripts/find_neighbors.exe?ID=122400&ly=15|website=stellar-database.com|title=Stars within 15 light-years of Bonner Durchmusterung +18°3421 (The Internet Stellar Database)|accessdate=2019-03-31}}</ref> |
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Gliese 686 is one of the many ] in the Solar System neighborhood with a ] of M1V,<ref name=Affer/><ref name="SIMBAD1" /> and has an ] of about 3600 ].<ref name=Affer/> Its ] in the ] is equal to 0.82% of that of the ],<ref name="ISDB2">{{cite web|url=http://www.stellar-database.com/Scripts/search_star.exe?Catalog=HIC&CatNo=86287|website=stellar-database.com|title=Bonner Durchmusterung +18°3421 (The Internet Stellar Database)|accessdate=2019-03-31}}</ref> while its total luminosity is equivalent to 2.7% that of the Sun,<ref name="Morales">{{cite journal|author1=Morales, J. C.|author2=Ribas, I.|author3=Jordi, C.|title=The effect of activity on stellar temperatures and radii|year=2008|journal=]|volume=478|issue=2|id=pp. 507-512|url=http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2008A%26A...478..507M&db_key=AST&nosetcookie=1|arxiv=0711.3523}}</ref> since a significant amount of the radiation emitted by these stars is ]. Considering only this last parameter, Gliese 686 is considerably brighter than other known red dwarfs; thus, it is 6.5 times more luminous than ] and 15 times more than ], the closest star to the Solar System. |
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Gliese 686 is one of the many ] in the Solar System neighborhood with a ] of M1V,<ref name=Affer/><ref name="SIMBAD1" /> and has an ] of about 3600 ].<ref name=Affer/> Its ] in the ] is equal to 0.82% of that of the ],<ref name="ISDB2">{{cite web|url=http://www.stellar-database.com/Scripts/search_star.exe?Catalog=HIC&CatNo=86287|website=stellar-database.com|title=Bonner Durchmusterung +18°3421 (The Internet Stellar Database)|accessdate=2019-03-31}}</ref> while its total luminosity is equivalent to 2.7% that of the Sun,<ref name="Morales">{{cite journal|author1=Morales, J. C.|author2=Ribas, I.|author3=Jordi, C.|title=The effect of activity on stellar temperatures and radii|year=2008|journal=]|volume=478|issue=2|id=pp. 507-512|url=http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2008A%26A...478..507M&db_key=AST&nosetcookie=1|arxiv=0711.3523|doi=10.1051/0004-6361:20078324|pages=507–512}}</ref> since a significant amount of the radiation emitted by these stars is ]. Considering only this last parameter, Gliese 686 is considerably brighter than other known red dwarfs; thus, it is 6.5 times more luminous than ] and 15 times more than ], the closest star to the Solar System. |
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Gliese 686 has a radius approximately equal to half the ]. Its projected ] is 2.5 km / s, its ] being equal to or less than 10.3 days.<ref name="Houdebine" /> It has a metallic content lower than that of the Sun; various studies estimate its index ] between -0.25 and -0.44.<ref name="Houdebine">{{cite journal|author=Houdebine, E. R.|title=Observation and modelling of main-sequence star chromospheres - XIV. Rotation of dM1 stars|year=2010|journal=]|volume=407|issue=3|id=pp. 1657–1673|url=http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2010MNRAS.407.1657H&db_key=AST&nosetcookie=1}}</ref><ref name="Jenkins">{{cite journal|author1=Jenkins, J. S.|author2=Ramsey, L. W.|author3=Jones, H. R. A.|author4=Pavlenko, Y.|author5=Gallardo, J.|author6=Barnes, J. R.|author7=Pinfield, D. J.|title=Rotational Velocities for M Dwarfs|year=2009|journal=]|volume=704|issue=2|id=pp. 975-988|url=http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2009ApJ...704..975J&db_key=AST&nosetcookie=1}}</ref> It has an approximate mass between 45% and 49% of the solar mass <ref name="Bonfils">{{cite journal|author1=Bonfils, X.|author2=Delfosse, X.|author3=Udry, S.|author4=Santos, N. C.|author5=Forveille, T.|author6=Ségransan, D.|title=Metallicity of M dwarfs. I. A photometric calibration and the impact on the mass-luminosity relation at the bottom of the main sequence|year=2005|journal=]|volume=442|issue=2|id=pp. 635-642|url=http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2005A%26A...442..635B&db_key=AST&nosetcookie=1}}</ref> and is a star with characteristics comparable to that of ]. |
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Gliese 686 has a radius approximately equal to half the ]. Its projected ] is 2.5 km / s, its ] being equal to or less than 10.3 days.<ref name="Houdebine" /> It has a metallic content lower than that of the Sun; various studies estimate its index ] between -0.25 and -0.44.<ref name="Houdebine">{{cite journal|author=Houdebine, E. R.|title=Observation and modelling of main-sequence star chromospheres - XIV. Rotation of dM1 stars|year=2010|journal=]|volume=407|issue=3|id=pp. 1657–1673|url=http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2010MNRAS.407.1657H&db_key=AST&nosetcookie=1}}</ref><ref name="Jenkins">{{cite journal|author1=Jenkins, J. S.|author2=Ramsey, L. W.|author3=Jones, H. R. A.|author4=Pavlenko, Y.|author5=Gallardo, J.|author6=Barnes, J. R.|author7=Pinfield, D. J.|title=Rotational Velocities for M Dwarfs|year=2009|journal=]|volume=704|issue=2|id=pp. 975-988|url=http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2009ApJ...704..975J&db_key=AST&nosetcookie=1}}</ref> It has an approximate mass between 45% and 49% of the solar mass <ref name="Bonfils">{{cite journal|author1=Bonfils, X.|author2=Delfosse, X.|author3=Udry, S.|author4=Santos, N. C.|author5=Forveille, T.|author6=Ségransan, D.|title=Metallicity of M dwarfs. I. A photometric calibration and the impact on the mass-luminosity relation at the bottom of the main sequence|year=2005|journal=]|volume=442|issue=2|id=pp. 635-642|url=http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2005A%26A...442..635B&db_key=AST&nosetcookie=1}}</ref> and is a star with characteristics comparable to that of ]. |
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