When will Callisto be in orbital resonance with the rest of Jupiter's big moons? The four Gallilean moons of Jupiter (from innermost) are Io, Europa, Ganymede, and Callisto.  Io, Europa, and Ganymede are in a 1:2:4 orbital resonance. Callisto's orbital period is 16.689 days, which is not much more than twice Ganymede's period of 7.1546 days.

If Jupiter's orbit around the Sun was stable, when could we expect Callisto to come into a 1:2:4:8 orbital resonance with the Jupiter's other Gallilean moons?
Related: Does anyone know why three of Jupiter&#39;s largest moons orbit in 1:2:4 resonance?
we tried to answer to this question in this article:
https://arxiv.org/abs/2001.01106
According to the current estimation of the tidal dissipation in the Jovian system, we expect that Callisto will be captured into resonance in about 1.5 billions of years, forming 1:2:4:8 resonant chain with the other Galilean moons.