Python code for Titan's spin state

Tidal dissipation in satellites affects their orbital and rotational
evolution and their ability to maintain subsurface oceans. However, a
satellite’s dissipation rate, parameterized by k2/Q, is hard to measure
and is only known for the Moon and Io. Here we show that Titan’s measured
departure from its expected rotation state can be used to infer k2/Q and
its boundary layer dissipation parameter K/Cs. Over the likely range of
ocean and ice shell thicknesses, we infer a K/Cs of 6.3x10-14 s-1 –
2.4x10-10 s-1, a k2/Q of 0.058–0.12, and a minimum dissipation factor Q≈5.
Titan’s dissipation parameters are one to two orders of magnitude larger
than the Moon’s and suggest an interior with a low effective viscosity.
Titan’s dissipation rate implies that its orbital eccentricity and
inclination are damping rapidly, consistent with an excitation within the
last ~350 Myr. Titan’s predicted tidal response could be measured by the
forthcoming Dragonfly lander, and JUICE could use our approach to
determine Ganymede’s k2/Q.