(New here!) As I am setting up the astronomic framework of my new world, I have real issues finding information, formulas and calculators to get the actual size (diameter or radius) or apparent size (disk size) of my moons.
I know my roche limit and the hill sphere of my planet, and I have 3 placed moons in given distances from my planet and their orbital period, but how do I go on with actual size and apparent size of a moon? Doesn't that depend on mass too? I need to know how big my moons must be, for example so that one of them covers the sun disk for an eclipse with a corona, and for other reasons.
Any known links to calculators or formulas regarding this topic?
For completion, these are my moon datas at the moment, the planet is roughly like earth (1 earth mass, 0.9 radius):
Moon 1 - distance: 19.110 km, orbital period: 7.27 hours
Moon 2 - distance: 171.990 km, orbital period: 196.4 hours
Moon 3 - distance: 509.000 km, orbital period: 1001.76 hours