HD 20782
| 觀測資料 曆元 J2000.0 | |
|---|---|
| 星座 | 天爐座 |
| 星官 | {{{星官}}} |
| 赤經 | 03h 20m 03.5776s |
| 赤緯 | –28° 51′ 14.656″ |
| 視星等(V) | 7.38 |
| 距離 | 117 光年 (36 pc) |
| 光譜分類 | G3V |
| 其他命名 | |
HD 20782是一個視星等7等的黃矮星,距離地球117光年,位於天爐座。
概要
HD 20782和另一個恆星HD 20781組成聯星系統,而這兩顆恆星各有行星環繞。成員星中的伴星HD 20781和HD 20782之間的角距離高達252角秒,相當於9080天文單位[1]。HD 20782的年齡大約是71 ± 4億年,質量接近太陽。2006年在主星HD 20782旁宣布發現系外行星 [2][3]。2011年在伴星HD 20781旁發現兩顆低質量的系外行星[4][5]。
行星系統
HD 20782
| 成員 (依恆星距離) |
质量 | 半長軸 (AU) |
轨道周期 (天) |
離心率 | 傾角 | 半径 |
|---|---|---|---|---|---|---|
| b | >1.80 ± 0.23 MJ | 1.36 ± 0.12 | 585.86 ± 0.03 | 0.92 ± 0.03 | — | — |
HD 20781
參見
參考資料
- ^ 存档副本. [2021-02-06]. (原始内容存档于2019-01-20).
- ^ 2.0 2.1 Jones; et al. High-eccentricity planets from the Anglo-Australian Planet Search (abstract). Monthly Notices of the Royal Astronomical Society. 2006, 369: 249–256. Bibcode:2006MNRAS.369..249J. arXiv:astro-ph/0603335
. doi:10.1111/j.1365-2966.2006.10298.x.[永久失效連結] (web preprint (页面存档备份,存于互联网档案馆))
- ^ Schneider, J. Notes for HD 20782 |cite web. The Extrasolar Planets Encyclopaedia. [2021-02-06]. (原始内容存档于2012-05-05).
- ^ Schneider, J. Notes for star HD 20781 |cite web. The Extrasolar Planets Encyclopaedia. [2011-09-12]. (原始内容存档于2013-03-14).
- ^ Mayor, M. Marmier,M. Lovis,C. Udry,S. Ségransan,D. Pepe,F. Benz,W. Bertaux,J.-L. Bouchy,F. Dumusque, G. Curto,Lo Mordasini,C. Queloz,D. Santos,N. C.; et al. The HARPS search for southern extra-solar planets XXXIV. Occurrence, mass distribution and orbital properties of super-Earths and Neptune-mass planets. 2011. arXiv:1109.2497
[astro-ph].
- ^ Schneider, J. Notes for star HD 20781. The Extrasolar Planets Encyclopaedia. [2011-09-12]. (原始内容存档于2013-03-14).
外部連結
- Notes for star HD 20782. The Extrasolar Planets Encyclopaedia. [2008-08-29]. (原始内容存档于2012-05-05).
| 成員 (依恆星距離) |
质量 | 半長軸 (AU) |
轨道周期 (天) |
離心率 | 傾角 | 半径 |
|---|---|---|---|---|---|---|
| b | 12.04 ± 1.11 M⊕ | 0.169 ± 0.0028 | 29.15 ± 0.0201 | 0.11 ± 0.06 | — | — |
| c | 15.76 ± 1,20 M⊕ | 0.3456 ± 0.0047 | 85.131 ± 0.1161 | 0.28 ± 0.09 | — | — |
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