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Drude is a lunar impact crater that lies on the far side of the Moon, in the rugged Montes Cordillera range that forms the outer ring around the Mare Orientale impact basin. It is located just behind the west-southwest limb, and this area is sometimes brought into sight from Earth during favorable librations. However, even at such times, the crater is viewed from the edge and little detail can be seen. This is a circular crater with a relatively sharp edge, sloping inner walls and a fairly level interior. It has not been significantly eroded, and is generally unremarkable. The nearest craters of note are Graff to the south-southeast and Focas to the north-northwest. The surrounding area is of note for the tumultuous terrain created by the ejecta from Mare Imbrium. The satellite crater formerly known as Drude S was renamed Heyrovský by the IAU. This crater lies north of the Mendel-Rydberg Basin, a 630 km wide impact basin of Nectarian age. ==References== * * * * * * * * * * * * 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Drude (crater)」の詳細全文を読む スポンサード リンク
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