Evolution of orbital elements of various orbits starting at ﹩a=1\;\mathrm{AU}﹩ and different eccentricities. The mass of the planetesimal considered here is ﹩2\cdot {10}^{25}\;{\rm{g}}.﹩ Top: evolution of the semimajor axis. Middle: evolution of the eccentricity. Note the logarithmic scale. Bottom: evolution of the Mach number. Note the logarithmic scale.