Asteroid collisional evolution - an integrated model for the evolution of asteroid rotation rates

Details Asteroid collisional evolution - an integrated model for the evolution of asteroid rotation rates Asteroid collisional evolution - an integrated model for the evolution of asteroid rotation rates

Jan 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...253..604f&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 253, no. 2, Jan. 1992, p. 604-614. Research supported by MURST and ASI.

Astronomy and Astrophysics

Astrophysics

44

Asteroids, Planetary Evolution, Planetary Rotation, Astronomical Models, Kinetic Energy, Spin Dynamics

Scientific paper

A comprehensive model for the changes in asteroid spin rates due to large collisions was developed by combining the theoretical results of Cellino et al. (1990) with previously published work on spin rate changes for cratering impacts (Harris, 1979; Dobrovolskis and Burns, 1984). The spin change algorithm, when incorporated into an existing simulation of collisional effects on asteroid sizes, produced an integrated model for studying the simultaneous evolution of asteroid sizes and spin rates over the solar system history. As a result of an analysis of 32 collisional scenarios with regard to the change in the spin rate as a function of asteroid size, it is concluded that the spin rates of all asteroids, except possibly the largest ones, have been significantly altered by collisions over the solar system history and that, in general, shattering impacts are much more important than cratering events in changing the spin of asteroids.

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