  Granular material that is bound by the low gravity of a small asteroid is
mobilized by slow velocity impacts. These splashes generated by impacts might
play an important role in sculpting the asteroid's surface. In laboratory
experiments we characterize the ejecta generated by spherical 150 $\rm \mu m$
diameter basalt grains impacting a granular bed at 0.8 m/s. We find that such
an impact typically leads to less than 10 particles being ejected from the
granular bed, with typical ejecta trajectories rising to less than one particle
diameter above the surface. That is, the observed impacts are highly
dissipative and only a small fraction of the impact energy is imparted onto the
ejecta. While the impactor itself still rebounds, it typically slows down
significantly to an average of about 20 % of its impact velocity. Scaled to
asteroids, impactor and ejecta generated from impacts of sand sized grains are
not able to spread over the asteroid's surface but will stay close to the
impact site. Therefore these highly inelastic impacts into soft granular beds
efficiently trap grains, in contrast to more elastic impacts on bare, rocky
surfaces confirming suggestions by Shinbrot (2017). This is also in agreement
to observed features on asteroids as this topological elasticity bias suggests
that redistribution of grains leads to a size segregation.
