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Pytheas (crater)
Pytheas is a small lunar impact crater located on the southern part of the Mare Imbrium, to the south of the crater Lambert.
It has a sharply defined rim, a hummocky outer rampart, and an irregular interior due to slumping or fall-back. There is a small crater along the northern outer rampart, and a similar crater about 20 km to the west. The crater possesses a small ray system that extends for a radius of about 50 kilometers. It is surrounded by lunar mare that is dusted with ray material from Copernicus to the south.
==Satellite craters==
By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Pytheas.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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