Dwarf planet Hygiea in the asteroid belt also has no moon. Nevertheless, a variety of smaller asteroids (also called slight planets) do have moons, but They are really all too faint to determine in any amateur telescope. Saturn has two ocean moons – Enceladus and Titan. Each have subsurface oceans https://gunnernrssr.isblog.net/5-simple-techniques-for-bestmoons-51837929