Used Google Earth/Moon, a public domain overlay of a US Air Force map from the early 1960s. Shows the Lunokhod 2 and Luna 21, with the named crater. "The United States Air Force created this LAC series of Lunar charts in the early 1960s to support the U.S. space program. It reflects scientists’ best understanding of the topography of the near side of the Moon at that time. This mosaic has been assembled from 44 pieces, each of which was originally a complete chart that included detailed information about the topography of that region"