Interesting but Titan and Ganymede are almost identical in mass despite a major difference in primary mass. Callisto is almost as big and Jupiter has two more large moons.
I think most people expect some form of mass ratio similar to those you discuss, but What I see is more evidence for an upper limit than a mass ratio. Jupiter has three times the mass of Saturn but instead of one moon three times as massive as Titan it has four equaling about three times Titan's mass. Off course Saturn also has far more medium size Moons and I'm not sure what the total moon mass ratio is.
This could all easily be a matter of chance, but I'm wondering if the "common sense" mass ratio assumption has any validity based on planetary formation modeling.
Regards,
Mark
Regards,
Mark
Space/Science » in reply to Maybe I can help.
Re: Maybe I can help.