90 Antiope is a C-type double asteroid in the outer asteroid belt. It was discovered on 1866-Oct-1, by Robert Luther. In 2000, it was found to consist of two almost-equally-sized bodies orbiting each other. At average diameters of about 88 km and 84 km, both components are among the 500 largest asteroids. Antiope is a member of the Themis family of asteroids
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