Dwarf Earth Hygiea while in the asteroid belt also has no moon. Having said that, quite a few scaled-down asteroids (also referred to as small planets) do have moons, but they are all much too faint to determine in any amateur telescope. Rhea is the second greatest moon of Saturn. https://moons59258.dbblog.net/8072268/the-single-best-strategy-to-use-for-bestmoons