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2008 ST291
, also written as 2008 ST291, is a trans-Neptunian object with an absolute magnitude of 4.2,〔 making it possibly a dwarf planet. == Size estimate ==
is estimated to be about in diameter, assuming a typical albedo of 0.09 for trans-Neptunian objects.〔 However, because its albedo is unknown and it has an absolute magnitude of 4.3,〔 it could be anywhere between 370 to 820 km in diameter.〔
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「2008 ST291」の詳細全文を読む
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