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克卜勒438b

Kepler-438b[1][2][3]
太陽系外行星 太陽系外行星列表

克卜勒438b(右)與地球的體積比較
母恆星
母恆星 克卜勒438
星座 天琴座[2]
赤经 (α) 18h 46m 35.000s
赤纬 (δ) +41° 57′ 3.93″
距離470;[2] 475[1] ly (145 pc)
物理性质
半径(r)1.120 R🜨
辐射功率(F)1.38 🜨
温度 (T) 276 K(3 °C) K
軌道參數
半長軸 (a) 0.16600 AU
軌道離心率 (e) 0.03 (+0.01, −0.03)[3]
公轉週期 (P) 35.23319000 d
軌道傾角 (i) 89.860°
發現
發現時間 2015[4]
發現者
發現方法 凌日法
發現地點 克卜勒太空望遠鏡
發表論文 已發表論文
其他名稱
KOI-3284.01; Kepler-438 b; KOI-3284 b; K03284.01; WISE J184634.98+415704.0 b; KIC 6497146 b; 2MASS J18463499+4157039 b
數據庫參考
太陽系外行星
百科全書
data
SIMBADdata

克卜勒438bKepler-438b,舊稱 KOI-3284.01)是一顆確認存在的體積與地球相近的岩石質太陽系外行星,位於紅矮星克卜勒438適居帶[5],在天球上位於天琴座[1][2]。該行星是由克卜勒太空望遠鏡以觀測行星通過母恆星盤面前,使恆星光度微幅下降的凌日法發現。美国国家航空航天局(NASA)於2015年1月6日宣布確認發現該行星[1]

概要

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克卜勒438b的體積接近地球,半徑約為地球的1.12倍。母恆星克卜勒438是體積與表面溫度遠低於太陽的紅矮星[5]。軌道週期35.2日[1][2]

適居性

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克卜勒438b被宣布發現時是宣稱它位於液態水可存在於該行星表面的適居帶。它因為其體積與推測表面溫度,被描述為至今所發現最類似地球的行星之一英语Earth analog[1][2]

克卜勒太空望遠鏡發現的,值得注意的太陽系外行星
已確認位於適居帶內的體積較小系外行星:
克卜勒62e克卜勒62f克卜勒186f克卜勒296e英语Kepler-296e克卜勒296f英语Kepler-296f、克卜勒438b、克卜勒440b克卜勒442b
(克卜勒太空望遠鏡團隊於2015年1月6日宣布發現)[1]

參見

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參考資料

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  1. ^ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Clavin, Whitney; Chou, Felicia; Johnson, Michele. NASA's Kepler Marks 1,000th Exoplanet Discovery, Uncovers More Small Worlds in Habitable Zones. NASA. 2015-01-06 [2015-01-06]. (原始内容存档于2015-01-07).  引用错误:带有name属性“NASA-20150106”的<ref>标签用不同内容定义了多次
  2. ^ 2.0 2.1 2.2 2.3 2.4 2.5 Sample, Ian. Kepler 438b: Most Earth-like planet ever discovered could be home for alien life. The Guardian. 2015-01-07 [2015-01-07]. (原始内容存档于2015-01-06). 
  3. ^ 3.0 3.1 Torres, Guillermo; Kipping, David M.; Fressin, Francois; Caldwell, Douglas A.; Twicken, Joseph D.; Ballard, Sarah; Batalha, Natalie M.; Bryson, Stephen T.; Ciardi, David R.; Henze, Christopher E.; Howell, Steve B.; Isaacson, Howard T.; Jenkins, Jon M.; Muirhead, Philip S.; Newton, Elisabeth R.; Petigura, Erik A.; Barclay, Thomas; Borucki, William J.; Crepp, Justin R.; Everett, Mark E.; Horch, Elliott P.; Howard, Andrew W.; Kolbl, Rea; Marcy, Geoffrey W.; McCauliff, Sean; Quintana, Elisa V. Validation of Twelve Small Kepler Transiting Planets in the Habitable Zone. 2015. arXiv:1501.01101可免费查阅 [astro-ph.EP]. 
  4. ^ Staff. Planet Kepler-438 b. The Extrasolar Planets Encyclopaedia. 2015 [2015-01-11]. (原始内容存档于2015-01-07). 
  5. ^ 5.0 5.1 Gilster, Paul. AAS: 8 New Planets in Habitable Zone. Centauri-dreams.org. 2015-01-06 [2015-01-09]. (原始内容存档于2015-01-09). 

外部連結

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克卜勒438b
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