Velocity of material falling onto a CPD υ_infall at radius r for planets of Saturnian (dotted line), Jovian (dashed lines), and super-Jovian (10 M_J, solid line) mass. The centrifugal radii r_cf of Jupiter and Saturn are indicated by the blue triangle and orange star, respectively. The radial position of the Galilean satellites is indicated by the four black circles and the radial position of Titan is indicated by the white circle. The planetary orbital radius, a_p, that corresponds to the infall velocity at the centrifugal radius, υ_infall (r_cf), is indicated on the right vertical axis. The shaded colored regions indicate different chemical consequences of shock-heating corresponding to a given υ_infall. The units on the abscissa are in multiples of the Jovian Hill radius. All calculations correspond to a solar mass star.