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2007 TG422
, also written as 2007 TG422, is a scattered-disc object with a perihelion distance of 35.6 AU, which is just inside the gravitational influence of Neptune,〔 and an aphelion distance similar to 90377 Sedna's.
==Size==
Mike Brown's website lists it as a possible dwarf planet with a diameter of 343 km based on an assumed albedo of 0.04. The albedo is expected to be low because the object has a blue (neutral) color.〔 But if the albedo is higher the object could be much smaller. Assuming a generic trans-Neptunian albedo of 0.09, it is about 270 km in diameter.〔 But because its true albedo is unknown and it has an absolute magnitude (H) of 6.2,〔 it could be anywhere from about 150 to 340 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）』
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