We need to set a minimum moon size

There are too many moons in the solar system. Cassini just found 2
more around Saturn. It's time to set a limit on the minimum size a
moon can be to be considered a moon and not just a rock that happens
to be caught in the planet's gravity. I'd say limiting the size to
10km in diameter is probably a good ratio. This will eliminate a few
around Jupiter and Saturn from being considered moons.