Relation between ejection pattern of impact ejecta and strength of cometary nuclei

Abstract

I performed a SPH simulation of collision between porous material to investigate a relation between the strength of the material and velocity plus ejection angle of impact ejecta. I found that the velocity increases and the angle increases from the surface normal of the target as the strength increases. Using the results, we can estimate the strength of minor objects (cometary nucleus, asteroids) by hitting the surface with a projectile and monitor the ejection pattern.