Fates of Ejecta from Tethys

In this work we investigate in detail the dynamics of ejecta originating from Saturn's moon Tethys. We use the SWIFT numerical integration package to compute the orbital evolution of the impact ejecta in the Saturn system. Ejection velocities are consistent with impact on competent surfaces and unto unconsolidated regolith. We do not include near-field effects, jetting, or effects peculiar to highly oblique impact. Ejecta are launched at velocities comparable to or exceeding the satellite's escape speed. Most test particles are swept up by Tethys on time-scales of a few to several decades. Depending on the source crater and ejection model, as much as 16% of ejecta is able to reach satellites other than the source moon. Ejecta originating near the leading side of Tethys are scattered outwards (with respect to Tethys' orbit) in the Saturn satellite system. By contrast, ejecta originating near the trailing side are scattered inwards. Of particular interest is the ability of ejecta from Tethys to reach its coorbital companions Calypso and Telesto.