While doing some testing of a new set up at the Winter Star Party, 2015, I took a few quick shots of part of the Leo Triplet (NGC3628). I happened to catch Asteroid 1133 (Lugduna) and tried to make this little animation. Click on the image and wait for a moment for it to load.
After you look for a minute, you can find at least 4 more asteroids moving in a similar direction… all appearing near to the galaxy.