Particle velocity distribution over a cross-section parallel to the orbital plane (i.e., perpendicular to the maximum moment of inertia axis) at different stages of the encounter process for the RCP (left column) and HCP (right column) models with V_∞ = 6 km s⁻¹ and q = 1.6 R_⊕ (i.e., the “shedding” case shown in Fig. 2). The particle velocity is computed with respect to the mass center of the rubble pile. The time relative to the perigee and distance to the Earth’s center are given at the bottom of each plot. The colors and directions of the short lines correspond to the magnitudes and directions of the velocity vectors, respectively.