Relevant timescales for fragments created by collisions inside a debris disk (a = 95– 105 au; m_Dust = 4.05 × 10²⁵g) around an A4V-star (M_⋆ = 1.92 M_⊙) with a planet at a_p = 20 au with an eccentricity of e_p = 0.6 and a mass of m_p = 2.5 M_J. The β value of the particles (blue, dotted), and the blowout limit (blue zone on the left) are shown. The precession timescale (orange; top), the crossing timescale (black; middle; where applicable), and the Poynting–Robertson timescale (red; crossing the top and the middle plot) are derived analytically. The collision timescale (black, dashed) was taken directly from the numerical results of the simulation. When possible, a range (shaded area) of timescales for a = 95– 105 au is given in addition to the value at a = 100 au (solid line).