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2003 Cp20Discovered February 11, 2003, by the Lincoln Near-Earth Asteroid Research project's station at Socorro, New Mexico, 2003 CP20 (also written 2003 CP20), was the first asteroid known to have an orbit entirely within that of Earth. Together with 2004 JG6, which has an even smaller orbit, it forms a subclass of Aten asteroids, known as Apoheles. 2003 CP20 takes slightly over 233 days to orbit the Sun. 2003 CP20 is a Venus-crosser asteroid, but does not get as close to the Sun as Mercury. With a diameter of about 2 km, it is the larger of the two known Apoheles and is one of the larger Aten asteroids. External links
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