Hi'iaka is a moon of the dwarf planet Haumea. Hi'iaka is about 350 km in diameter and the largest and outermost moon. The surface is covered with lots of ice. It was formed billions of years ago when something impacted Haumea and broke its layer of ice. The moon was discovered on 26 January, 2005 by the telescopes at the W. M. Keck Observatory in Hawaii.
It's named after the daughter of the Hawaiian goddess of fertility and childbirth Haumea. Hi'iaka was the goddess of dance.