Europa: Basic parameters

Basic Europa info:

  • Europa's orbital period is 3.5 Earth days.

  • Io's period is 1.769 days; Europa's period is 3.551 days; and Ganymede's period is 7.155 days. These periods have the exact ratio 1:2:4, which implies that these moons are in resonance.

    Bennett et al.

    For every four times Io goes around Jupiter, Europa goes around exactly twice, and Ganymede exactly once.

    Callisto is not (presently) part of this resonant situation.

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