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4856 Seaborg is an asteroid named in honor of Glenn T. Seaborg, an American nuclear chemist and Nobel laureate. It was discovered on October 22, 1983, by Carolyn S. Shoemaker and Eugene M. Shoemaker at Palomar Observatory in California. The asteroid's diameter is approximately 11 kilometers, and it completes an orbit around the Sun every 4.3 years.