LHS 2090

**LHS 2090**
觀測かんそく資料しりょう; 曆こよみ元もと J2000.0
星座せいざ	巨きょ蟹かに座ざ
星ほし官かん
赤あか經けい	09h 00m 23.594s
赤あか緯ぬき	+21° 50′ 05.43″
視み星ほし等とう（V）	16.11
特性とくせい
演えんじ化か阶段	主しゅ序じょ星ぼし
光ひかり谱分类	M6.5 V
视星等とう (J)	9.44
天体てんたい测定
徑みち向こう速度そくど (Rv)	23.3 km/s
自じ行くだり (μみゅー)	赤あか经：-514.942 mas/yr ; 赤あか纬：-592.253 mas/yr
视差 (πぱい)	157.2686 ± 0.0535 mas
距离	20.739 ± 0.007 ly ; (6.359 ± 0.002 pc)
詳細しょうさい資料しりょう
質量しつりょう	0.09 M☉
半徑はんけい	0.12 R☉
亮あきら度たび	0.00082 L☉
溫度おんど	2680+24; − K
金属きんぞく量りょう [Fe/H]	-0.06+0.17; − dex
自轉じてん	0.439 d
自轉じてん速度そくど (v sin i)	15.0+1.0; − km/s
其他命名めいめい
	LHS 2090、LP 368-128、NLTT 20726、2MASS J09002359+2150054
參考さんこう資料しりょう庫こ
SIMBAD	资料
	LHS 2090 LHS 2090在ざい巨きょ蟹かに座ざ的てき位置いち;

LHS 2090是ぜ一いち顆位於巨きょ蟹かに座ざ光ひかり譜ふ類型るいけい為ためM6.5V的てき紅べに矮星，距離きょり地球ちきゅう20.7光年こうねん。^[9]

2001年ねん，這顆恆星こうせい在ざい距太陽たいよう6 秒びょう差さ距處被ひ確定かくてい為ため紅べに矮星。^[10]作為さくい非常ひじょう冷ひや的てき紅べに矮星的てき典型てんけい特徵とくちょう，其光譜ふ主要しゅよう由よし分子ぶんし吸水きゅうすい。金屬きんぞく量りょう與太よた陽ひ相似そうじ。^[7]

2018年ねん，徑みち向こう速度そくど測量そくりょう法ほう沒ぼつ有ゆう檢けん測はか到いたLHS 2090周圍しゅうい軌道きどう上じょう存在そんざい恆星こうせい伴とも星ぼし或ある巨きょ行ぎょう星ぼし。^[2]

參考さんこう

^ ^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. ^{[失效しっこう連結れんけつ]}
^ 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. 斯特拉ひしげ斯堡天文てんもん資料しりょう中心ちゅうしん. [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. （原始げんし内容ないよう存そん档 (PDF)于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

[2MASS-1] 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.

[Henry2018-2] 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

[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. ^{[失效しっこう連結れんけつ]}

[Davison2015-4] 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

[Fouque2017-5] 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.

[Dieterich2013-6] 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

[Royas2011-7] 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

[SIMBAD-8] LHS 2090. SIMBAD. 斯特拉ひしげ斯堡天文てんもん資料しりょう中心ちゅうしん. [29 January 2018].

[Henry2006-9] 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. （原始げんし内容ないよう存そん档 (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

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觀測かんそく資料しりょう曆こよみ元もと J2000.0
星座せいざ	巨きょ蟹かに座ざ
星ほし官かん
赤あか經けい	09^h 00^m 23.594^s^[1]
赤あか緯ぬき	+21° 50′ 05.43″^[1]
視み星ほし等とう（V）	16.11^[2]
特性とくせい
演えんじ化か阶段	主しゅ序じょ星ぼし^[2]
光ひかり谱分类	M6.5 V^[3]
视星等とう (J)	9.44^[2]
天体てんたい测定

徑みち向こう速度そくど (R_v)	23.3^[2] km/s
自じ行くだり (μみゅー)	赤あか经：-514.942 mas/yr 赤あか纬：-592.253 mas/yr
视差 (πぱい)	157.2686 ± 0.0535 mas
距离	20.739 ± 0.007 ly (6.359 ± 0.002 pc)

詳細しょうさい資料しりょう

質量しつりょう	0.09^[4] M_☉
半徑はんけい	0.12^[5] R_☉
亮あきら度たび	0.00082^[6] L_☉
溫度おんど	2680+24 −^[6] K
金属きんぞく量りょう [Fe/H]	-0.06+0.17 −^[7] dex
自轉じてん	0.439 d^[5]
自轉じてん速度そくど (v sin i)	15.0+1.0 −^[5] km/s

其他命名めいめい
LHS 2090、LP 368-128、NLTT 20726、2MASS J09002359+2150054^[8]
參考さんこう資料しりょう庫こ
SIMBAD	资料
LHS 2090 LHS 2090在ざい巨きょ蟹かに座ざ的てき位置いち