小惑星リュウグウのテクトニクス最若年代を示すグルーブマーク

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書誌事項

タイトル別名
  • Planetary groove mark indicating the latest event on asteroid Ryugu

抄録

Planetary groove marks are found on asteroid Ryugu. These marks indicate the latest event on the asteroid. The clear mark must be formed later than faint giant craters. The groove marks are common in terrestrial sedimentary formation. The terrestrial groove mark is considered to be formed under a rapid water stream. However, there is neither water nor stream on the asteroid. The groove marks are considered to have been formed by travelling big boulder on the surface of asteroid with weak gravity. Image processing by computer will make clearer the further details of surface tectonics on the asteroid.

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