LHS 2090
| 觀測資料 曆元 J2000.0 | |
|---|---|
| 星座 | 巨蟹座 |
| 星官 | |
| 赤經 | 09h 00m 23.594s[1] |
| 赤緯 | +21° 50′ 05.43″[1] |
| 視星等（V） | 16.11[2] |
| 特性 | |
| 演化階段 | 主序星[2] |
| 光譜分類 | M6.5 V[3] |
| 視星等 (J) | 9.44[2] |
| 天體測定 | |
| 徑向速度 (Rv) | 23.3[2] km/s |
| 自行 (μ) | 赤經：-514.942 mas/yr 赤緯：-592.253 mas/yr |
| 視差 (π) | 157.2686 ± 0.0535 mas |
| 距離 | 20.739 ± 0.007 ly (6.359 ± 0.002 pc) |
| 詳細資料 | |
| 質量 | 0.09[4] M☉ |
| 半徑 | 0.12[5] R☉ |
| 亮度 | 0.00082[6] L☉ |
| 溫度 | 2680+24 −[6] K |
| 金屬量 [Fe/H] | -0.06+0.17 −[7] dex |
| 自轉 | 0.439 d[5] |
| 自轉速度 (v sin i) | 15.0+1.0 −[5] km/s |
| 其他命名 | |
| 參考資料庫 | |
| SIMBAD | 資料 |
  LHS 2090 LHS 2090在巨蟹座的位置 | |
LHS 2090是一顆位於巨蟹座光譜類型為M6.5V的紅矮星，距離地球20.7光年。[9]
2001年，這顆恆星在距太陽6 秒差距處被確定為紅矮星。[10]作為非常冷的紅矮星的典型特徵，其光譜主要由分子吸水。金屬量與太陽相似。[7]
2018年，徑向速度測量法沒有檢測到LHS 2090周圍軌道上存在恆星伴星或巨行星。[2]
參考
- ^ 1.0 1.1 Cutri, R. M.; et al. 2MASS All-Sky Catalog of Point Sources. VizieR On-line Data Catalog. 2003. Bibcode:2003yCat.2246....0C.
- ^ 2.0 2.1 2.2 2.3 2.4 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
- ^ 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.[失效連結]
- ^ 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
- ^ 5.0 5.1 5.2 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.
- ^ 6.0 6.1 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
- ^ 7.0 7.1 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
- ^ LHS 2090. SIMBAD. 斯特拉斯堡天文資料中心. [29 January 2018].
- ^ 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. （原始內容存檔 (PDF)於2020-01-25）.
- ^ 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
