perijove
Noun
Meaning
periapsis in orbit around Jupiter
Source: WordNetAntonyms
Hypernyms
Related terms
Examples
An observer sitting on the (drifting) perijove will see the moons coming into conjunction in the same place (elongation).
The correct equation (part of the Laplace equations) is: : In other words, the mean motion of Io is indeed double of that of Europa taking into account the precession of the perijove.