Evolutions of the disk mass (left panel; not including the mass of the largest moons) and the masses of the largest three moons (right panel). At around t ∼ 1 × 10⁵ s with a time interval of Δt ∼ 10⁴ s, the landslide occurs and a particle disk is formed (left panel). The disk spreads and starts to form gravitational clumps with masses larger than ∼ 0.001M _c at t ∼ 5.5 × 10⁵ s, where M _c is the mass of the central primary. Two large moons are formed by the end of our simulations (t = 25 × 10⁵ s; ∼700 hr).