Radial drift speed comparision between the approximate Eq. (8) and the numerical solution to the differential equations. The radius is 1 m, the initial location is at 2 AU, temperature and midplane density are constant over the disk and set to 140 K and 2.5 × 10¹⁰ g cm⁻³. Initially thebody moves with Keplerian speed in azimuthal direction and no radial velocity. The dashed, vertical line marks the stopping time.