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HD 139357 is a 6th magnitude K-type giant star located approximately 390 light years from Earth, visible in the constellation Draco. Its mass is four thirds that of our Sun but its radius is 11.47 times larger. However, despite being a giant star, it is only 3.07 billion years old, which is younger than our Sun. It hosts a planet discovered in 2009. == See also == * 42 Draconis * Iota Draconis * List of extrasolar planets * List of stars in Draco 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「HD 139357」の詳細全文を読む スポンサード リンク
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