LHS 2090

LHS 2090是一颗位于巨蟹座光谱类型为M6.5V的红矮星，距离地球20.7光年。^[9]

LHS 2090

观测资料 历元 J2000.0
星座	巨蟹座
星官
赤经	09h 00m 23.594s[1]
赤纬	+21° 50′ 05.43″[1]
视星等（V）	16.11[2]
特性
演化阶段	主序星[2]
光谱分类	M6.5 V[3]
视星等 (J)	9.44[2]
天体测定
径向速度 (Rv)	23.3[2] km/s
自行 (μ)	赤经：-514.942 mas/yr 赤纬：-592.253 mas/yr
视差 (π)	157.2686 ± 0.0535 mas
距离	20.739 ± 0.007 ly (6.359 ± 0.002 pc)
详细资料
质量	0.09[4] M☉
半径	0.12[5] R☉
亮度	0.00082[6] L☉
温度	2680+24 −[6] K
金属量 [Fe/H]	-0.06+0.17 −[7] dex
自转	0.439 d[5]
自转速度 (v sin i)	15.0+1.0 −[5] km/s
其他命名
LHS 2090、​LP 368-128、​NLTT 20726、​2MASS J09002359+2150054[8]
参考数据库
SIMBAD	资料
LHS 2090 LHS 2090在巨蟹座的位置

2001年，这颗恒星在距太阳6 秒差距处被确定为红矮星。^[10]作为非常冷的红矮星的典型特征，其光谱主要由分子吸水。金属量与太阳相似。^[7]

2018年，径向速度测量法没有检测到LHS 2090周围轨道上存在恒星伴星或巨行星。^[2]

参考

1. Cutri, R. M.; et al. 2MASS All-Sky Catalog of Point Sources. VizieR On-line Data Catalog. 2003. Bibcode:2003yCat.2246....0C.
2. Henry, Todd J.; Jao, Wei-Chun; Winters, Jennifer G.; Dieterich, Sergio B.; Finch, Charlie T.; Ianna, Philip A.; Riedel, Adric R.; Silverstein, Michele L.; Subasavage, John P.; Vrijmoet, Eliot Halley, The Solar Neighborhood XLIV: RECONS Discoveries within 10 parsecs, The Astronomical Journal, 2018, 155 (6): 265, Bibcode:2018AJ....155..265H, S2CID 53983430, arXiv:1804.07377 , doi:10.3847/1538-3881/aac262
3. Alonso-Floriano, F. J.; Morales, J. C.; Caballero, J. A.; Montes, D.; Klutsch, A.; Mundt, R.; Cortés-Contreras, M.; Ribas, I.; Reiners, Ansgar; Amado, P. J.; Quirrenbach, A.; Jeffers, S. V. CARMENES input catalogue of M dwarfs (PDF). Astronomy & Astrophysics. 2015, 577: A128. Bibcode:2015A&A...577A.128A. S2CID 53135130. arXiv:1502.07580 . doi:10.1051/0004-6361/201525803.^{[失效链接]}
4. Davison, Cassy L.; White, R. J.; Henry, T. J.; Riedel, A. R.; Jao, W-C.; Bailey Iii, J. I.; Quinn, S. N.; Cantrell, J. R.; Subasavage, J. P.; Winters, J. G., A 3D Search for Companions to 12 Nearby M Dwarfs, The Astronomical Journal, 2015, 149 (3): 106, Bibcode:2015AJ....149..106D, S2CID 9719725, arXiv:1501.05012 , doi:10.1088/0004-6256/149/3/106
5. Fouqué, Pascal; et al, SPIRou Input Catalogue: global properties of 440 M dwarfs observed with ESPaDOnS at CFHT, Monthly Notices of the Royal Astronomical Society, April 2018, 475 (2): 1960–1986, Bibcode:2018MNRAS.475.1960F, arXiv:1712.04490 , doi:10.1093/mnras/stx3246.
6. Dieterich, Sergio B.; Henry, Todd J.; Jao, Wei-Chun; Winters, Jennifer G.; Hosey, Altonio D.; Riedel, Adric R.; Subasavage, John P., The Solar Neighborhood. Xxxii. The Hydrogen Burning Limit, The Astronomical Journal, 2013, 147 (5): 94, S2CID 21036959, arXiv:1312.1736 , doi:10.1088/0004-6256/147/5/94
7. Rojas-Ayala, Bárbara; Covey, Kevin R.; Muirhead, Philip S.; Lloyd, James P., Metallicity and Temperature Indicators in M Dwarfk-Band Spectra: Testing New and Updated Calibrations with Observations of 133 Solar Neighborhood M Dwarfs, The Astrophysical Journal, 2011, 748 (2): 93, S2CID 41902340, arXiv:1112.4567 , doi:10.1088/0004-637X/748/2/93
8. LHS 2090. SIMBAD. 斯特拉斯堡天文资料中心. [29 January 2018].
9. Henry, T. J.; Jao, Wei-Chun; Subasavage, John P.; Beaulieu, Thomas D.; Ianna, Philip A.; Costa, Edgardo; Méndez, René A. The Solar Neighborhood. XVII. Parallax Results from the CTIOPI 0.9 m Program: 20 New Members of the RECONS 10 Parsec Sample (PDF). The Astronomical Journal. 2006, 132 (6): 2360–2371 [2023-03-22]. Bibcode:2006AJ....132.2360H. S2CID 15002841. arXiv:astro-ph/0608230 . doi:10.1086/508233. （原始内容存档 (PDF)于2020-01-25）.
10. Scholz, R.-D.; Meusinger, H.; Jahreiß, H., Search for nearby stars among proper motion stars selected by optical-to-infrared photometry, Astronomy & Astrophysics, 2001, 374 (2): L12–L15, S2CID 8488435, arXiv:astro-ph/0106222 , doi:10.1051/0004-6361:20010811