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Cratering time scales for the Galilean satellitesAn attempt is made to estimate the present cratering rate for each Galilean satellite within the correct order of magnitude and to extend the cratering rates back into the geologic past on the basis of evidence from the earth-moon system. For collisions with long and short period comets, the magnitudes and size distributions of the comet nuclei, the distribution of their perihelion distances, and the completeness of discovery are addressed. The diameters and masses of cometary nuclei are assessed, as are crater diameters and cratering rates. The dynamical relations between long period and short period comets are discussed, and the population of Jupiter-crossing asteroids is assessed. Estimated present cratering rates on the Galilean satellites are compared and variations of cratering rate with time are considered. Finally, the consistency of derived cratering time scales with the cratering record of the icy Galilean satellites is discussed.
Document ID
19830035017
Acquisition Source
Legacy CDMS
Document Type
Other - Collected Works
Authors
Shoemaker, E. M.
(Geological Survey Flagstaff, AZ, United States)
Wolfe, R. F.
(U.S. Geological Survey Flagstaff, AZ, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1982
Subject Category
Astronomy
Accession Number
83A16235
Funding Number(s)
PROJECT: PROJECT VOYAGER
CONTRACT_GRANT: NASA ORDER W-13130
CONTRACT_GRANT: NASA ORDER W-08395
CONTRACT_GRANT: NASA ORDER W-13709
Distribution Limits
Public
Copyright
Other

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