Are there libration points in a restricted 4-body problem (system of three orbiting bodies of significant mass, plus the libration point orbiting body)? If so, how many of them exist and where are they located?
Jovian system must have its periodic or quasi-periodic libration points. Would two or more of its Galilean moons in orbital resonance with Jupiter play a role despite their low masses relative to the primary, or is an orbiting system of 3 bodies of significant mass required for such libration points to remain stable? How does such a system's effective potential change and could any of these libration points be periodic?