格利澤54
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]。
| 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 | |
| 光譜分類 | M2.5 (composite) |
| 天體測定 | |
| 自行 (μ) | 赤經：386.2±0.2[2] mas/yr 赤緯：579.7±0.1[2] mas/yr |
| 視差 (π) | 126.9 ± 0.4[2] mas |
| 距離 | 25.70 ± 0.08 ly (7.88 ± 0.02 pc) |
| 絕對星等 (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 − |
| 傾斜角 (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 | |
| 參考資料庫 | |
| SIMBAD | 資料 |
| ARICNS | 資料 |
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
編輯參考資料
編輯- ^ 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
. doi:10.1051/0004-6361/201833051. VizieR中此天體在蓋亞望遠鏡第二批數據發佈的記錄
- ^ 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 . arXiv:1608.04775 . doi:10.3847/0004-6256/152/5/141 .
- ^ 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 , doi:10.3847/1538-4357/aaf3bc
- ^ 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
- ^ 5.0 5.1 5.2 CD-68 47. SIMBAD. 斯特拉斯堡天文資料中心. [6 May 2017].
- ^ 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 . doi:10.1051/0004-6361:20078324. pp. 507-512 (Table consulted on CDS).
- ^ 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 . doi:10.1086/423911.
