2005 YU55 motion across the sky

This is a quick shot of the near-Earth asteroid 2005 YU55 using four consecutive exposures from the Harvard MicroObservatory robotic telescope in Amado, Arizona, on the night of Nov. 8, 2011. The asteroid was moving across the sky so fast that each 60-second exposure generated one of the streaks on the picture. Then the gap between streaks is the 2-minute interval before the next exposure begins. It only took about 10 minutes for the asteroid to cross the entire 1-degree field!

The coordinates are approximately 22h34m and N17deg21' and the time span was from 03:33 to 03:43 UT on Nov. 9.

I'm sure this image would benefit from doing more work on reducing noise, but this is what I have for now.