Picture of Asteroid San Diego, an inner main belt asteroid, within a plaque measuring 7-1/4 inches x 9-7/8 inches. The plate below reads 'Discovered by Eleanor F. Helin on September 30, 1982, at Palomar Observatory of the California Institute of Technology. Named as a celestial tribute to the City of San Diego in appreciation of the City's responsiveness and cooperation in the campaign to restore dark skies for astronomers probing the universe. Donor's name and occasion information were not provided to the City Clerk's office.