1981 SL1. Discovered 1981 Sept. 26 by B. A. Skiff and N. G. Thomas at Anderson Mesa.
Named in appreciation of the long and continuing support of the Lowell Observatory by members of the Putnam family, in particular Roger Lowell Putnam (1893–1972) and Michael C. J. Putnam, father and son, successive trustees of the Lowell Observatory. (M 6835)