Universe & space

Discovery of Hiʻiaka

26 January 2005

Hiʻiaka is the larger of the two known moons of the dwarf planet Haumea, in the Kuiper belt beyond Neptune. It was discovered in 2005 by a team led by Michael Brown using the Keck Observatory in Hawaii, and is a few hundred kilometers across. Its surface is mostly water ice, like Haumea's, which supports the idea that both come from a giant collision that created a family of icy bodies. The discovery of Hiʻiaka allowed astronomers to calculate the mass of Haumea from the moon's orbit. It is named after a daughter of Haumea in Hawaiian mythology, who is associated with the island of Hawaiʻi.

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