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WD 0806-661
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WD 0806-661 : ウィキペディア英語版
WD 0806-661


WD 0806-661 (L 97-3, GJ 3483) is a wide binary system of a white dwarf and a Y-type sub-brown dwarf (designated "B"), located in constellation Volans at 63 light-years from Earth. The companion was discovered in 2011. It has the largest actual (2500 AU) and apparent separation (more than 2 arcminutes) of any known planetary-mass object.
==Discovery==
Component B was discovered in 2011 with Spitzer Space Telescope. Its discovery paper is ''Luhman et al., 2011''. At the time of its discovery, WD 0806-661 B was the coldest "star" that has ever been found, with a temperature of only 27–80 °C, which is similar to some hot areas of Earth.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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