The fractional mass of ejecta scales with the specific energy of the collision. Mass of ejecta as a fraction of total colliding mass as a function of normalized specific impact energy (﹩{Q}_{{\rm{R}}}/{Q}_{{\rm{RD}}}^{* }﹩). The shape of symbols corresponds to the mass ratio of the collision and the color corresponds to the impact parameter. The dashed and dotted gray lines are the models from Z. M. Leinhardt & S. T. Stewart (2012) and H. Genda et al. (2017), respectively.