About the best thing you can do is map the moons yourself as they move across the night sky
http://www.uesp.net/wiki/Lore:Masser
http://www.uesp.net/wiki/Lore:Secunda
http://www.imperial-library.info/content/cosmology
http://www.uesp.net/wiki/Lore:The_Lunar_Lorkhan
None of the lore refers to the cosmology of the moons. I wonder if there is a setting in the CK that governs the movement of the moons.