Examples of initial conditions for Kerberos. Top row: orbital evolution of Kerberos for two initial conditions of e_C, namely, 0.001 and 0.1. The other parameters are a_C∕R = 4, Ω_C ∕n_C = 2, A = 10, and Δt_P = 600 s. These simulations are successful according to the adopted criteria (see Sect. 5). Bottom row: time variations in the mean-motion ratio (left) and ϕ_5∕1 = 5λ − λ_C − ϖ_C − 3ϖ (right). We show the angle for the specific case of e_C = 0.001. The mean value of n_C∕n is larger than 5.