Dwarf planet Hygiea in the asteroid belt also has no moon. On the other hand, many smaller sized asteroids (also referred to as slight planets) do have moons, but These are all too faint to find out in almost any newbie telescope. Huge-effect speculation. In Wikipedia. By NASA/JPL-Caltech, General public https://erickadfdd.ssnblog.com/33813955/the-definitive-guide-to-best-moons