Thursday 22nd May 2014 - 20 Minutes of Comet Garradd Movement
I was doing an extended mapping run on 10th March 2012 when I came across Comet Garradd so took some images over a 20 minute period. The image below combines two images of Comet Garradd that are 20 minutes apart. I estimate a movement of about 1 minute of arc during this period. The two 12.8/12.9 magnitude comparison stars are 3 minutes of arc apart. Garradd is moving at about 3 minutes of arc per hour from these figures. SBIG ST9XE with C14 at f/10 on Paramount ME.