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163693 Atira
Asteroids Asteroid 2003 CP20 1 Selden Ball.jpg
163693 Atira in celestia.
Discovered by LINEAR
Date of Discovery 11 February 2003

163693 Atira, provisional designation 2003 CP20, is an eccentric, stony asteroid, dwelling in the interior of Earth's orbit. It is classified as a near-Earth object. Atira is a binary asteroid, a system of two asteroids orbiting their common barycenter. The primary component with a diameter of approximately 4.8 kilometers is orbited by a smaller object that measures about 1 kilometer. Atira was discovered on 11 February 2003, by the Lincoln Near-Earth Asteroid Research (LINEAR) team at Lincoln Laboratory's Experimental Test Site in Socorro, New Mexico, United States.