The terminator cuts through the Sea of Showers (Mare Imbrium) and Sea of Clouds (Mare Nubium) …. Imbrium being the landing place for Luna 2 & 17 and Appolo 15.
Prominent craters around Imbrium are Plato on the southern edge and Copernicus and Eratosthenes in the north. The long, graceful arc of the Montes Appeninus lie along the north western rim.
Imaged 1900 14 September 2013
Celestron CPC 9.25
Exp 1/60 sec