Fig. 5
From: Regolith behavior under asteroid-level gravity conditions: low-velocity impact experiments
Outcomes of all the low-velocity impacts observed in PRIME-1, PRIME-3, and the COLLIDE campaigns as a function of the impact velocity. Circles: projectile embedded, no ejecta; diamonds: projectile rebound, no ejecta; squares: projectile embedded, ejecta production; triangles: projectile rebound, ejecta production; open symbols: quartz sand target; filled symbols: JSC-1 target; green plus sign: JSC Mars-1 target; red: reduced gravity (∼10−2g); black: microgravity (<10−4g). All impacts producing no ejecta are shown at a mean ejecta velocity of 1 cm/s for the clarity of the graph, even though no speed was measured as no ejecta was observed