维基百科
格利泽829
格利泽829 是位於飛馬座中由兩顆紅矮星組成的雙星系統。[6] 基於視差測量，距離太陽約為22光年。[1] 該系統將在大約91,000年後最接近太陽，屆時它的近日點距離將達到17.65光年﹙5.41秒差距﹚。[4]
| 觀測資料 曆元 J2000.0 | |
|---|---|
| 星座 | 飛馬座 |
| 星官 | |
| 赤經 | 21h 29m 36.81225s[1] |
| 赤緯 | +17° 38′ 35.8542″[1] |
| 視星等（V） | 10.35[2] |
| 特性 | |
| 光谱分类 | M3.0Ve[3] |
| U−B 色指数 | +1.31[2] |
| B−V 色指数 | +1.61[2] |
| 天体测定 | |
| 徑向速度 (Rv) | −25.0[4] km/s |
| 自行 (μ) | 赤经：+1007.13[1] mas/yr 赤纬：+377.27[1] mas/yr |
| 视差 (π) | 147.4958 ± 0.0257[5] mas |
| 距离 | 22.113 ± 0.004 ly (6.78 ± 0.001 pc) |
| 軌道[6] | |
| 繞行週期 (P) | 53.221±0.004 d |
| 偏心率 (e) | 0.374±0.004 |
| 近心点 曆元 (T) | 48980.2±0.2 JD |
| 近心點幅角 (ω) (secondary) | 300±1° |
| 半振幅 (K1) (primary) | 18.7±0.1 km/s |
| 半振幅 (K2) (secondary) | 18.7±0.1 km/s |
| 詳細資料 | |
| 表面重力 (log g) | 5.0[3] |
| 溫度 | 3,400[3] K |
| 金属量 [Fe/H] | −0.13[7] dex |
| 其他命名 | |
| 參考資料庫 | |
| SIMBAD | 资料 |
| ARICNS | 资料 |
特性
主星的溫度為3400K。它的光譜分類為M3.0Ve，B-V 顏色指數為1.61，也稱為Ross 775。它的視星等為10.35。
參考
- ^ 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F., Validation of the new Hipparcos reduction, Astronomy and Astrophysics, 2007, 474 (2): 653–664, Bibcode:2007A&A...474..653V, S2CID 18759600, arXiv:0708.1752 , doi:10.1051/0004-6361:20078357.
- ^ 2.0 2.1 2.2 Ianna, P. A.; Whitman, W. R., Parallaxes and proper motions from the McCormick Observatory List 45, Astronomical Journal, April 1984, 89: 568–570, Bibcode:1984AJ.....89..568I, doi:10.1086/113550.
- ^ 3.0 3.1 3.2 Lépine, Sébastien; et al, A Spectroscopic Catalog of the Brightest (J < 9) M Dwarfs in the Northern Sky, The Astronomical Journal, 2013, 145 (4): 102, Bibcode:2013AJ....145..102L, S2CID 117144290, arXiv:1206.5991 , doi:10.1088/0004-6256/145/4/102.
- ^ 4.0 4.1 Bailer-Jones, C. A. L., Close encounters of the stellar kind, Astronomy & Astrophysics, March 2015, 575: 13, Bibcode:2015A&A...575A..35B, S2CID 59039482, arXiv:1412.3648 , doi:10.1051/0004-6361/201425221, A35.
- ^ Brown, A. G. A.; et al. Gaia Early Data Release 3: Summary of the contents and survey properties. Astronomy & Astrophysics. 2021, 649: A1. Bibcode:2021A&A...649A...1G. S2CID 227254300. arXiv:2012.01533 . doi:10.1051/0004-6361/202039657 . 已忽略未知参数
|collaboration=(帮助) (勘误: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR. - ^ 6.0 6.1 Delfosse, Xavier; et al, New neighbours. I. 13 new companions to nearby M dwarfs, Astronomy and Astrophysics, April 1999, 344: 897–910, Bibcode:1999A&A...344..897D, arXiv:astro-ph/9812008 .
- ^ Rojas-Ayala, Bárbara; et al. Metallicity and Temperature Indicators in M Dwarf K-band Spectra: Testing New and Updated Calibrations with Observations of 133 Solar Neighborhood M Dwarfs (PDF). The Astrophysical Journal. April 2012, 748 (2): 93. Bibcode:2012ApJ...748...93R. S2CID 41902340. arXiv:1112.4567 . doi:10.1088/0004-637X/748/2/93.
- ^ Ross 775. SIMBAD. 斯特拉斯堡天文資料中心. [2016-10-25].