Palus Somni [SEP] located on astronomical body
Palus Somni
Palus Somni (Latin for "Marsh of Sleep") is an area on the Moon of relatively level but somewhat uneven terrain that lies along the northeastern edge of Mare Tranquillitatis and the Sinus Concordiae. It has selenographic coordinates 14.1° N, 45.0° E, and has a diameter of 163 km.
The surface of this feature has low ridges and patches of level terrain. It has a higher albedo than the lunar mare to the west, and is a shade of grey typical of continental terrain.
Proclus (crater)
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. It lies to the south of the prominent, terraced crater Macrobius, and west-northwest of the lava-flooded Yerkes.
Description.
The rim of Proclus is distinctly polygonal in shape, having the shape of a pentagon, and does not rise