Tidal Locking & Synchronous Rotation

How tidal torques drive a moon toward spin-orbit synchrony

Parameters

State

Spin ratio ω/n
Tidal torque
Locked?No
Time (orbits)0

Physics

τ_tidal ∝ (Gm²R⁵)/(Qa⁶) × f(e)
İ dω/dt = -τ sign(ω−n)
Locked when |ω−n| < δ_lock
t_lock ∝ Q·a⁶/(m_planet·R⁵)