Rotational distributions of fragments caused by impact disruption and asteroids

Abstract

The distribution of angular velocity of fragments caused by impact disruption has been based on the data of "observable" fragments mainly from target surfaces. Recently, we carry out the experiments with glass plate targets, in which the angular velocities of most fragments can be measured. We extrapolate the relation between the size and angular velocity of fragments obtained by the experiments to asteroid sizes. The extrapolated values agree well with the observational results of the Karin family and some fast rotators.