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Seminar -- Ceres and the Terrestrial Planets Impact Cratering Record

Wednesday, October 4, 2017
Bob
Strom

Dwarf Planet Ceres, the largest object in the Main Asteroid Belt, has a surface that exhibits a range of crater densities for a crater diameter range of 5-300 km. In all areas the shape of the craters’ size-frequency distribution is very similar to those of the most ancient heavily cratered surfaces on the terrestrial planets. The most heavily cratered terrain on Ceres covers ~15% of its surface and has a crater density the same as <1% of the lunar highlands. The higher crater density on Ceres is probably due to the high impact rate during and after the Late Heavy Bombardment (LHB) and indicates that the other 85% of Ceres was partly resurfaced after the LHB. The Ceres cratering record strongly indicates that the period of Late Heavy Bombardment originated from a population whose size-frequency distribution resembles that of the Main Belt Asteroids.

 

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