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Gliese 54
觀測資料
曆元 J2000
星座 杜鵑座
星官
赤經 01h 10m 22.8809s[1]
赤緯 −67° 26′ 41.9487″[1]
視星等（V） 9.80
特性
光谱分类M2.5 (composite)
天体测定
自行 (μ) 赤经：386.2±0.2[2] mas/yr
赤纬：579.7±0.1[2] mas/yr
视差 (π)126.9 ± 0.4[2] mas
距离25.70 ± 0.08 ly
(7.88 ± 0.02 pc)
绝对星等 (MV)+10.23
軌道[3]
主星Gliese 54 A
伴星Gliese 54 B
繞行週期 (P)1.14434+0.00022
−0.00022 yr
半長軸 (a)0.12619+0.00039
−"
(1.00 AU)
偏心率 (e)0.1718+0.0024
−
倾斜角 (i)125.32+0.35
−0.35°
詳細資料 [4]
Gliese 54 A
質量0.43 M☉
半徑0.51 R☉
溫度4250 K
金屬量0.17[3]
自轉速度 (v sin i)-15.0 km/s
Gliese 54 B
質量0.3 M☉
其他命名
CD−68°47、​HIP 5496、​LHS 1208、​2MASS J01102281-6726425
參考資料庫
SIMBAD资料
ARICNS资料

格利澤54 (GJ 54 / HIP 5496 / LHS 1208)[5]是位於杜鵑座邊緣，幾乎在鄰近水蛇座的一個聯星系統，距離地球25.7光年[2]。視星等為+9.80，低於眼睛可觀察到的亮度閾值[5]。

格利澤54是一顆紅矮星，光譜類型為M2，有效溫度為4250K。[6] 它被列為變星[5]。 它有一個伴星，與它形成一個軌道周期約為427天的雙星系統。這顆伴星是一顆紅矮星，其亮度比格利澤54低約1個星等。[7]

參見

參考資料

  1. ^ 1.0 1.1 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 可免费查阅. doi:10.1051/0004-6361/201833051.  VizieR中此天体在盖亚望远镜第二批数据发布的记录
  2. ^ 2.0 2.1 2.2 2.3 Benedict, G. F.; et al. The Solar Neighborhood. XXXVII: The Mass-Luminosity Relation for Main-sequence M Dwarfs. The Astronomical Journal. 2016, 152 (5). 141. Bibcode:2016AJ....152..141B 可免费查阅. arXiv:1608.04775 可免费查阅. doi:10.3847/0004-6256/152/5/141 可免费查阅. 
  3. ^ 3.0 3.1 Mann, Andrew W.; Dupuy, Trent; Kraus, Adam L.; Gaidos, Eric; Ansdell, Megan; Ireland, Michael; Rizzuto, Aaron C.; Hung, Chao-Ling; Dittmann, Jason; Factor, Samuel; Feiden, Gregory; Martinez, Raquel A.; Ruíz-Rodríguez, Dary; Chia Thao, Pa, How to constrain your M dwarf. II. The Mass-Luminosity-Metallicity relation from 0.075 to 0.70 solar masses, The Astrophysical Journal, 2019, 871 (1): 63, Bibcode:2019ApJ...871...63M, S2CID 119372932, arXiv:1811.06938 可免费查阅, doi:10.3847/1538-4357/aaf3bc 
  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 可免费查阅, doi:10.3847/1538-3881/aac262 
  5. ^ 5.0 5.1 5.2 CD-68 47. SIMBAD. 斯特拉斯堡天文資料中心. [6 May 2017]. 
  6. ^ Morales, J. C.; Ribas, I.; Jordi, C. The effect of activity on stellar temperatures and radii. Astronomy and Astrophysics. 2008, 478 (2): 507. Bibcode:2008A&A...478..507M. S2CID 16238033. arXiv:0711.3523 可免费查阅. doi:10.1051/0004-6361:20078324. pp. 507-512 (Table consulted on CDS). 
  7. ^ Golimowski, David A.; Henry, Todd J.; Krist, John E.; Dieterich, Sergio; Ford, Holland C.; Illingworth, Garth D.; Ardila, David R.; Clampin, Mark; Franz, Otto G.; Wasserman, Lawrence H.; Benedict, G. Fritz; McArthur, Barbara E.; Nelan, Edmund G. The Solar Neighborhood. IX. Hubble Space Telescope Detections of Companions to Five M and L Dwarfs Within 10 parsecs of the Sun. The Astronomical Journal. 2004, 128 (4): 1733–1747. Bibcode:2004AJ....128.1733G. S2CID 12310839. arXiv:astro-ph/0406664 可免费查阅. doi:10.1086/423911. 
source: https://zh.wikipedia.org/wiki/%E6%A0%BC%E5%88%A9%E6%BE%A454