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Brightness caused by rotational variability of Hi’iaka

Brightness caused by rotational variability of Hi’iaka
Brightness caused by rotational variability of Hi’iaka Brightness caused by rotational variability of Hi’iaka, the larger outer moon of the dwarf planet Haumea. “Folding” the brightness measurements on a 9.8-hour period shows a clear correlation between ground-based and space-based data. This clearly shows that Hi’iaka is rapidly rotating and non-spherical. Danielle Hastings (UCLA)