What is the smallest natural sphere in our solar system?

[md2000]

@Lumpy

I think we’re going to have to dump the idea of planets having a discrete number of moons, and simply accept that many planets are surrounded by rubble of all sizes.

“That’s no moon, it’s a spaceship…” -Obi Wan

I would suggest if the rubble is smaller than your spaceship, it does not qualify as a moon…