Proclus (crater)
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Proclus is a young lunar impact crater located to the west of the Mare Crisium, on the east shore of the Palus Somni. Its diameter is 27 km. It was named after 5th century Greek mathematician, astronomer and philosopher Proclus.
Apollo 17 image
Proclus from Apollo 15. Note the prominent ray system. NASA photo.
The Proclus crater area with mineral postprocessing
Proclus from Apollo 11, showing the rays extending into Mare Crisium
Mare Crisium
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Mare Crisium is a lunar mare located in the Moon's Crisium basin, just northeast of Mare Tranquillitatis. Mare Crisium is a basin of Nectarian age.
Low-altitude view of southern Mare Crisium from Apollo 11, facing northwest and showing the crater Shapley near center at the edge of the mare, and the distal wall of the crater Greaves near the horizon