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Haumea distance from sun
The size of a Solar System object can be deduced from its, its distance, and its . Objects appear bright to Earth observers either because they are large or because they are highly reflective. If their reflectivity (albedo) can be ascertained, then a rough estimate can be made of their size. For most distant objects, the albedo is unknown, but Haumea is large and bright enough for its to be measured, which has given an approximate value for its albedo and thus its siz.
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