[Nugget]

Originally Posted by basa

Not strictly an earth moon, more a large asteroid that has temporarily been 'captured' by earths gravity. It actually divides its time between orbiting the sun and earth in a horseshoe orbit. See space.com.

There could at any time be many 'moons' orbiting earth temporaraily, but a lot depends on whether you call them moons or asteroids or dust particles.

I call them 'Martin'