格利澤673
| 觀測資料 曆元 J2000 | |
|---|---|
| 星座 | 蛇夫座 |
| 星官 | |
| 赤經 | 17h 25m 45.23266s[1] |
| 赤緯 | +02° 06′ 41.1208″[1] |
| 視星等（V） | 7.492[2] |
| 特性 | |
| 光谱分类 | K7V[2] |
| U−B 色指数 | 1.261[2] |
| B−V 色指数 | 1.373[2] |
| 天体测定 | |
| 徑向速度 (Rv) | −24.4[3] km/s |
| 自行 (μ) | 赤经：−579.66[1] mas/yr 赤纬：−1,184.76[1] mas/yr |
| 视差 (π) | 129.6459 ± 0.0175[4] mas |
| 距离 | 25.157 ± 0.003 ly (7.713 ± 0.001 pc) |
| 绝对星等 (MV) | 8.06[2] |
| 詳細資料 | |
| 半徑 | 0.564[5] R☉ |
| 表面重力 (log g) | 4.70[6] |
| 溫度 | 4,030[5] K |
| 金属量 [Fe/H] | −0.20[6] dex |
| 自轉 | 11.94 days[7] |
| 年齡 | (205 ± 21) × 106[7] 年 |
| 其他命名 | |
| 參考資料庫 | |
| SIMBAD | 资料 |
  Gliese 673 格利澤673在蛇夫座的位置 | |
格利澤673 是一顆位於蛇夫座的橙矮星。光譜分類為K7V[2]。這個烘譜類型的主序星質量為太陽質量(M☉)的60–70%。
這顆恆星相對靠近太陽，距離大約25.1光年。然而，儘管如此接近，它仍然太微弱，無法用肉眼觀察到。它被認為是一顆緩慢旋轉的恆星，具有相對較高的自行。
格利澤673是附近的橙矮星之一，在類太陽恆星和紅矮星之間的“最佳位置”，就生命存在的可能性及其易探測性而言（在這種情況下，行星可能位於該系統的外部保守宜居帶）。[9]
參見
[编辑]參考資料
[编辑]- ^ 1.0 1.1 1.2 1.3 van Leeuwen, F., Validation of the new Hipparcos reduction, Astronomy and Astrophysics, November 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 2.3 2.4 2.5 Koen, C.; et al, UBV(RI)C JHK observations of Hipparcos-selected nearby stars, Monthly Notices of the Royal Astronomical Society, April 2010, 403 (4): 1949–1968, Bibcode:2010MNRAS.403.1949K, doi:10.1111/j.1365-2966.2009.16182.x
- ^ Nordström, B.; et al, The Geneva-Copenhagen survey of the Solar neighbourhood. Ages, metallicities, and kinematic properties of ˜14 000 F and G dwarfs, Astronomy and Astrophysics, May 2004, 418: 989–1019, Bibcode:2004A&A...418..989N, S2CID 11027621, arXiv:astro-ph/0405198 , doi:10.1051/0004-6361:20035959
- ^ 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. - ^ 5.0 5.1 van Belle, Gerard T.; von Braun, Kaspar, Directly Determined Linear Radii and Effective Temperatures of Exoplanet Host Stars, The Astrophysical Journal, April 2009, 694 (2): 1085–1098, Bibcode:2009ApJ...694.1085V, S2CID 18370219, arXiv:0901.1206 , doi:10.1088/0004-637X/694/2/1085
- ^ 6.0 6.1 Frasca, A.; et al, REM near-IR and optical photometric monitoring of pre-main sequence stars in Orion. Rotation periods and starspot parameters, Astronomy and Astrophysics, December 2009, 508 (3): 1313–1330, Bibcode:2009A&A...508.1313F, S2CID 118361131, arXiv:0911.0760 , doi:10.1051/0004-6361/200913327
- ^ 7.0 7.1 Barnes, Sydney A., Ages for Illustrative Field Stars Using Gyrochronology: Viability, Limitations, and Errors, The Astrophysical Journal, November 2007, 669 (2): 1167–1189, Bibcode:2007ApJ...669.1167B, S2CID 14614725, arXiv:0704.3068 , doi:10.1086/519295
- ^ LHS 447 -- High proper-motion Star, SIMBAD (Centre de Données astronomiques de Strasbourg), [2011-10-15], （原始内容存档于2023-03-28）
- ^ Arney, Giada N. The K Dwarf Advantage for Biosignatures on Directly Imaged Exoplanets. The Astrophysical Journal. 2019, 873 (1): L7. doi:10.3847/2041-8213/ab0651 .
外部連結
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