Discovery of Orthosie

Orthosie is a small irregular moon of Jupiter, only about two kilometres across, and a member of the Ananke group of retrograde moons. They follow similar orbits at a great distance from Jupiter, in the opposite direction to the planet's rotation, and are thought to be pieces of a larger body that was captured and then shattered. Orthosie was discovered in a survey of the outer moons of Jupiter by astronomers at the University of Hawaii. Its name comes from Greek mythology, and as a retrograde moon it follows the convention of ending in the letter e.

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