Did you know there are already 91 moons found to be orbiting ASTEROIDS?
Andrzej Karon, a very good friend of mine, has created a website
containing a constantly updated info on these unique bodies:

http://moonlets.republika.pl/index_en.html

He also creates animations of asteroids and their moons, based on the
most accurate data and scientific models:

http://moonlets.republika.pl/anims/(87)_sylvia-divx.avi

You can see more of these he

http://moonlets.republika.pl/animations_en.html

The latest news is the first moon orbiting a Centaur, namely the
(66391) 1999 KW4. You can see all the data in the chart he provided:

http://moonlets.republika.pl/table_en.html

Enjoy,

Karol P.