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XO-4
XO-4 is a star located approximately light-years away from Earth in the Lynx constellation. It has a magnitude of about 11 and cannot be seen with the naked eye but is visible through a small telescope.〔 A search for a binary companion star using adaptive optics at the MMT Observatory was negative.〔 ==Planetary system== One known exoplanet, XO-4b, which is classified as a hot jupiter, orbits XO-4. This exoplanet was discovered in 2008 by the XO Telescope project using the transit method.〔
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「XO-4」の詳細全文を読む
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