distance of about 600,000 miles (about 960,000 kilometers) in 2028, reported Dr. Donald K. Yeomans and Dr. Paul W. Chodas, JPL scientists who specialize in computing the predicted orbits of comets, asteroids, planets and other bodies in the solar system. ???Data on the asteroid from March 1990 (well before its discovery in December 1997) was integrated into the orbit calculations by Yeomans and