格利泽686

**Gliese 686**
观测资料; 历元 J2000
星座	武仙座
星官
赤经	17h 37m 53.34674s
赤纬	+18° 35′ 30.1607″
视星等（V）	9.577
特性
光谱分类	M1
天体测定
径向速度 (Rv)	−9.55 ± 0.1 km/s
自行 (μ)	赤经：926.741 mas/yr ; 赤纬：984.697 mas/yr
视差 (π)	122.5546 ± 0.0176 mas
距离	26.613 ± 0.004 ly ; (8.160 ± 0.001 pc)
详细资料
质量	0.42 ± 0.05 M☉
半径	0.42 ± 0.05 R☉
表面重力 (log g)	4.83 ± 0.04
亮度	0.028 ± 0.006 L☉
温度	3663 ± 68 K
金属量 [Fe/H]	−0.30 ± 0.09 dex
自转速度 (v sin i)	1.01 ± 0.80 km/s
其他命名
	BD+18 3421、HIP 86287、G 170-55、LHS 452、2MASS J17375330+1835295
参考数据库
SIMBAD	资料
ARICNS	资料

天球赤道座标： 17^h 37^m 53.34674^s，+18° 35′ 30.1607″

格利泽686 (GJ 686 / HIP 86287 / LHS 452)^[5]是一颗位于武仙座的红矮星，视星等为+9.577^[2]。尽管它距离太阳系很近，仅约26.5光年，但它并不是该星座中已知最近的恒星，因为格利泽661距离太阳系20.9光年^[6]。离这颗恒星最近的系统是明亮的天市左垣三，距离4.5光年。紧随其后的是GJ 1230和格利泽6673，距离分别为7.2和7.6光年。^[7]

格利泽686是太阳系附近众多红矮星之一，光谱类型为M1V^[2]^[5]，有效温度约为3600K^[2]。它在可见光谱中的亮度等于太阳亮度的 0.82%，^[8]而它的总光度相当于太阳亮度的 2.7%，^[9]因为这些物体发出的大量辐射星星是红外线不可见光。格利泽686比其他已知的红矮星要亮得多；因此，它的亮度是罗斯154的6.5倍，是离太阳系最近的恒星比邻星的15倍。

格利泽686的半径大约等于太阳半径的一半。其预计自转速度为2.5公里/秒，自转周期等于或小于10.3天^[10]。它的金属含量低于太阳；各种研究估计其金属丰度指数在 -0.25 和 -0.44 之间^[10]^[11]。它的质量大约为太阳质量的45%到49%^[12]，并且是一颗具有与拉卡伊9352相当的特性的恒星。

行星系统[编辑]

通过径向速度法发现格利泽686有一个已知的超级地球类行星^[2]。

格利泽686的行星系
成员 (依恒星距离)	质量	半长轴 (AU)	轨道周期 (天)	离心率	倾角	半径
b	>6.624+0.432 −^[13] M_⊕	0.091±0.004	15.53209+0.00166 −0.00167	—	—	—

参考资料[编辑]

^ ^1.0 ^1.1 ^1.2 ^1.3 Brown, A. G. A.; Vallenari, A.; Prusti, T.; de Bruijne, J. H. J.; et al. Gaia Data Release 2. Summary of the contents and survey properties. Astronomy & Astrophysics. 2018. Bibcode:2018A&A...616A...1G. arXiv:1804.09365 . doi:10.1051/0004-6361/201833051.
^ ^2.0 ^2.1 ^2.2 ^2.3 ^2.4 ^2.5 ^2.6 Affer, L.; Damasso, M.; Micela, G.; Poretti, E.; Scandariato, G.; Maldonado, J.; Lanza, A. F.; Covino, E.; Rubio, A. Garrido. HADES RV program with HARPS-N at TNG. IX. A super-Earth around the M dwarf Gl686. Astronomy & Astrophysics. 31 January 2019, 622: A193. Bibcode:2019A&A...622A.193A. ISSN 0004-6361. S2CID 118863481. arXiv:1901.05338 . doi:10.1051/0004-6361/201834868.
^ Nidever, David L.; Marcy, Geoffrey W.; Butler, R. Paul; Fischer, Debra A.; Vogt, Steven S.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. Radial Velocities for 889 Late-Type Stars. The Astrophysical Journal Supplement Series. 2002, 141 (2): 503–522. Bibcode:2002ApJS..141..503N. S2CID 51814894. arXiv:astro-ph/0112477 . doi:10.1086/340570.
^ Brown, A. G. A.; et al. Gaia Early Data Release 3: Summary of the contents and survey properties. Astronomy & Astrophysics. 2021, 649: A1. Bibcode:2021A&A...649A...1G. S2CID 227254300. arXiv:2012.01533 . doi:10.1051/0004-6361/202039657 . 已忽略未知参数|collaboration= (帮助) (勘误: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
^ ^5.0 ^5.1 ^5.2 [
http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=LHS+452
LHS 452] 请检查|url=值 (帮助). SIMBAD. 斯特拉斯堡天文资料中心.
^ Closest stars. closeststars.com. [2019-03-31]. （原始内容存档于2023-04-11）.
^ Stars within 15 light-years of Bonner Durchmusterung +18°3421 (The Internet Stellar Database). stellar-database.com. [2019-03-31].
^ Bonner Durchmusterung +18°3421 (The Internet Stellar Database). stellar-database.com. [2019-03-31]. （原始内容存档于2023-04-11）.
^ Morales, J. C.; Ribas, I.; Jordi, C. The effect of activity on stellar temperatures and radii. Astronomy and Astrophysics. 2008, 478 (2): 507–512 [2023-04-11]. Bibcode:2008A&A...478..507M. S2CID 16238033. arXiv:0711.3523 . doi:10.1051/0004-6361:20078324. pp. 507-512. （原始内容存档于2018-10-02）.
^ ^10.0 ^10.1 Houdebine, E. R. Observation and modelling of main-sequence star chromospheres - XIV. Rotation of dM1 stars. Monthly Notices of the Royal Astronomical Society. 2010, 407 (3): 1657. Bibcode:2010MNRAS.407.1657H. doi:10.1111/j.1365-2966.2010.16827.x . pp. 1657–1673.
^ Jenkins, J. S.; Ramsey, L. W.; Jones, H. R. A.; Pavlenko, Y.; Gallardo, J.; Barnes, J. R.; Pinfield, D. J. Rotational Velocities for M Dwarfs. The Astrophysical Journal. 2009, 704 (2): 975–988. Bibcode:2009ApJ...704..975J. S2CID 119203469. arXiv:0908.4092 . doi:10.1088/0004-637X/704/2/975.
^ Bonfils, Xavier; Delfosse, Xavier; Udry, Stéphane; Santos, Nuno C.; Forveille, Thierry; Ségransan, Damien. Metallicity of M dwarfs. I. A photometric calibration and the impact on the mass-luminosity relation at the bottom of the main sequence. Astronomy and Astrophysics. 2005, 442 (2): 635–642. Bibcode:2005A&A...442..635B. S2CID 13900901. arXiv:astro-ph/0503260 . doi:10.1051/0004-6361:20053046.
^ Burt, Jennifer A.; Feng, Fabo; Holden, Bradford; Mamajek, Eric E.; Huang, Chelsea X.; Rosenthal, Mickey M.; Wang, Songhu; Paul Butler, R.; Vogt, Steven S.; Laughlin, Gregory; Henry, Gregory W.; Teske, Johanna K.; Wang, Sharon W.; Crane, Jeffrey D.; Shectman, Steve A., A Collage of Small Planets from the Lick–Carnegie Exoplanet Survey: Exploring the Super-Earth and Sub-Neptune Mass Regime, The Astronomical Journal, 2021, 161 (1): 10, Bibcode:2021AJ....161...10B, S2CID 227013469, arXiv:2011.08867 , doi:10.3847/1538-3881/abc2d0

[GaiaDR2-1] 1.0 ^1.1 ^1.2 ^1.3 Brown, A. G. A.; Vallenari, A.; Prusti, T.; de Bruijne, J. H. J.; et al. Gaia Data Release 2. Summary of the contents and survey properties. Astronomy & Astrophysics. 2018. Bibcode:2018A&A...616A...1G. arXiv:1804.09365 . doi:10.1051/0004-6361/201833051.

[Affer-2] 2.0 ^2.1 ^2.2 ^2.3 ^2.4 ^2.5 ^2.6 Affer, L.; Damasso, M.; Micela, G.; Poretti, E.; Scandariato, G.; Maldonado, J.; Lanza, A. F.; Covino, E.; Rubio, A. Garrido. HADES RV program with HARPS-N at TNG. IX. A super-Earth around the M dwarf Gl686. Astronomy & Astrophysics. 31 January 2019, 622: A193. Bibcode:2019A&A...622A.193A. ISSN 0004-6361. S2CID 118863481. arXiv:1901.05338 . doi:10.1051/0004-6361/201834868.

[Nidever-3] Nidever, David L.; Marcy, Geoffrey W.; Butler, R. Paul; Fischer, Debra A.; Vogt, Steven S.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. Radial Velocities for 889 Late-Type Stars. The Astrophysical Journal Supplement Series. 2002, 141 (2): 503–522. Bibcode:2002ApJS..141..503N. S2CID 51814894. arXiv:astro-ph/0112477 . doi:10.1086/340570.

[GaiaEDR3-4] Brown, A. G. A.; et al. Gaia Early Data Release 3: Summary of the contents and survey properties. Astronomy & Astrophysics. 2021, 649: A1. Bibcode:2021A&A...649A...1G. S2CID 227254300. arXiv:2012.01533 . doi:10.1051/0004-6361/202039657 . 已忽略未知参数|collaboration= (帮助) (勘误: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.

[SIMBAD1-5] 5.0 ^5.1 ^5.2 [
http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=LHS+452
LHS 452] 请检查|url=值 (帮助). SIMBAD. 斯特拉斯堡天文资料中心.

[closeststars-6] Closest stars. closeststars.com. [2019-03-31]. （原始内容存档于2023-04-11）.

[ISDB-7] Stars within 15 light-years of Bonner Durchmusterung +18°3421 (The Internet Stellar Database). stellar-database.com. [2019-03-31].

[ISDB2-8] Bonner Durchmusterung +18°3421 (The Internet Stellar Database). stellar-database.com. [2019-03-31]. （原始内容存档于2023-04-11）.

[Morales-9] Morales, J. C.; Ribas, I.; Jordi, C. The effect of activity on stellar temperatures and radii. Astronomy and Astrophysics. 2008, 478 (2): 507–512 [2023-04-11]. Bibcode:2008A&A...478..507M. S2CID 16238033. arXiv:0711.3523 . doi:10.1051/0004-6361:20078324. pp. 507-512. （原始内容存档于2018-10-02）.

[Houdebine-10] 10.0 ^10.1 Houdebine, E. R. Observation and modelling of main-sequence star chromospheres - XIV. Rotation of dM1 stars. Monthly Notices of the Royal Astronomical Society. 2010, 407 (3): 1657. Bibcode:2010MNRAS.407.1657H. doi:10.1111/j.1365-2966.2010.16827.x . pp. 1657–1673.

[Jenkins-11] Jenkins, J. S.; Ramsey, L. W.; Jones, H. R. A.; Pavlenko, Y.; Gallardo, J.; Barnes, J. R.; Pinfield, D. J. Rotational Velocities for M Dwarfs. The Astrophysical Journal. 2009, 704 (2): 975–988. Bibcode:2009ApJ...704..975J. S2CID 119203469. arXiv:0908.4092 . doi:10.1088/0004-637X/704/2/975.

[Bonfils-12] Bonfils, Xavier; Delfosse, Xavier; Udry, Stéphane; Santos, Nuno C.; Forveille, Thierry; Ségransan, Damien. Metallicity of M dwarfs. I. A photometric calibration and the impact on the mass-luminosity relation at the bottom of the main sequence. Astronomy and Astrophysics. 2005, 442 (2): 635–642. Bibcode:2005A&A...442..635B. S2CID 13900901. arXiv:astro-ph/0503260 . doi:10.1051/0004-6361:20053046.

[Burt2020-13] Burt, Jennifer A.; Feng, Fabo; Holden, Bradford; Mamajek, Eric E.; Huang, Chelsea X.; Rosenthal, Mickey M.; Wang, Songhu; Paul Butler, R.; Vogt, Steven S.; Laughlin, Gregory; Henry, Gregory W.; Teske, Johanna K.; Wang, Sharon W.; Crane, Jeffrey D.; Shectman, Steve A., A Collage of Small Planets from the Lick–Carnegie Exoplanet Survey: Exploring the Super-Earth and Sub-Neptune Mass Regime, The Astronomical Journal, 2021, 161 (1): 10, Bibcode:2021AJ....161...10B, S2CID 227013469, arXiv:2011.08867 , doi:10.3847/1538-3881/abc2d0

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观测资料历元 J2000
星座	武仙座
星官
赤经	17^h 37^m 53.34674^s^[1]
赤纬	+18° 35′ 30.1607″^[1]
视星等（V）	9.577^[2]
特性
光谱分类	M1^[2]
天体测定

径向速度 (R_v)	−9.55 ± 0.1^[3] km/s
自行 (μ)	赤经：926.741^[1] mas/yr 赤纬：984.697^[1] mas/yr
视差 (π)	122.5546 ± 0.0176^[4] mas
距离	26.613 ± 0.004 ly (8.160 ± 0.001 pc)

详细资料 ^{^[2]}

质量	0.42 ± 0.05 M_☉
半径	0.42 ± 0.05 R_☉
表面重力 (log g)	4.83 ± 0.04
亮度	0.028 ± 0.006 L_☉
温度	3663 ± 68 K
金属量 [Fe/H]	−0.30 ± 0.09 dex
自转速度 (v sin i)	1.01 ± 0.80 km/s

其他命名
BD+18 3421、HIP 86287、G 170-55、LHS 452、2MASS J17375330+1835295^[5]
参考数据库
SIMBAD	资料
ARICNS	资料