Asteroid 2006 VV2.
Stereo pair of the asteroid passing M81. The above image should be viewed with parallel eyes, not crossed. The image below is configured for cross-eyed viewing. If you are unable to merge either of these, you can try a blue/red anaglyph format (red is the left eye).
Bill's image was made from Tuscaloosa, Alabama, and Robert's from Vado, New Mexico. The distance between the two sites is 1780 km, and the distance to the asteroid is 4.6 million km. The images were made March 29, 2007 at about UT 02:30.
I was able to image the asteroid three nights later [more].