Mouseover BLACK screen to start video.It will loop 5 times. These are 9 frames of 1 minute each taken 4 minutes apart.

Comet Linear C/2006 VZ1 07-15-07 UT 03:28 Distance .57A.U. Mag 9.8

Comet Linear C/2004 B1 07-15-07 UT 04:03 Distance 6.09A.U. Mag 18.3