Frequency map analysis of KOI-1599 outer planet rotation angle assuming a rigid body with |Z₀ | = 1.5 × 10⁻⁶ (top) or |Z₀| = 1.0 × 10⁻⁷ (bottom). Each dot corresponds to a grid with 181 × 201 different initial conditions of γ(0) and , respectively, with γ(t) = θ(t) − λ(0). The color index gives the derivative , where η is the main frequency of γ(t). The blue dots correspond to resonant motion, green dots to nonresonant regular motion, and red dots to chaotic motion.