Can ballistic analysis enlighten us on the collision of Comet Shoemaker-Levy 9 with Jupiter?

Many questions originated when Comet Shoemaker-Levy 9 collided with Jupiter on July 1994 have been solved. However, quite a lot of them remain unexplained. Plumes and impact footprints were among the most spectacular consequences of the crash. We relate both features starting from two well measured observables: (1) center-to-edge distances on the impact sites and (2) times obtained from lightcurves. In this approach, only simple projectile equations have been used. An interesting result is found: an excellent linear correlation between the vertical velocity of the ejected material and the pre-impact fragment diameters. The apex of the ejected material was at 70 degrees above the horizontal, and the representative bulk material travelled on a 40 degrees trajectory.