Fig. 8
From: Regolith behavior under asteroid-level gravity conditions: low-velocity impact experiments
Combined PRIME-3 (black) and COLLIDE (green) coefficient of restitution measurements. This coefficient of restitution is defined as the ratio of the projectile speed after and before the impact with the regolith bed. Impacts into quartz sand are marked by asterisks, and impacts into JSC-1 by triangles. Error bars are shown for the PRIME-3 and COLLIDE-3 measurements. For COLLIDE-1 and COLLIDE-2, they can be found in Colwell (2003). The straight line represents the power law fit to all data points shown, which has an index of − 0.27