This is a great thread. I've just come back in from refining the orbit of an NEO for the Minor Planet Centre.
Lets see just how fluffy it is when it lands on Wardies head
(actually, there are a team of amateurs who have shown that various asteroids are indeed 'fluffy' and are constrained in their rotational periods due to effects of gravity - bloody good work guys and all done with backyard scopes that would have otherwise been used taking the bazillionth and oneth photo of Orion!)