Distribution of ϖ − ϖ_p around an eccentric planet. We plot the cases of e_p = 0.1, 0.3, and 0.5 in the left, center, and right columns, respectively. The upper, middle, and lower panels show different times. The mean eccentricities of planetesimals divided by the planetary eccentricity are indicated in the upper left corner of each panel. Once ⟨e⟩ exceeds e_p, the planetesimals’ orbits start to align to the planetary orbit.