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Krusenstern is a lunar crater that lies amidst the battered terrain in the southern part of the Moon's near side. Nearly attached to the east-southeast rim is the crater Apianus. Less than one crater diameter to the southwest is the prominent Werner. Krusenstern is intruding into a large circular plain to the north designated Playfair G. Playfair itself lies to the northeast. Krusenstern is 47 kilometers in diameter, and its walls reach a height of 1,600 meters.〔''Autostar Suite Astronomer Edition''. CD-ROM. Meade, April 2006.〕〔(【引用サイトリンク】 work=luna.e-cremona.it ) 〕 Its outer rim has been heavily worn by impact erosion, leaving an irregular ring of rising ridges and an inner wall incised by impacts. A joined pair of craters, including Krusenstern A, lie along the eastern rim. The interior floor of Krusenstern is a nearly featureless plain, marked only by a few tiny craterlets. The crater is from the Pre-Nectarian period, 4.55 to 3.92 billion years ago.〔 It is named after Adam Johann Krusenstern, an early 19th-century Baltic German explorer in Russian service.〔 ==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 Krusenstern. 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「Krusenstern (crater)」の詳細全文を読む スポンサード リンク
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