Dec 10 ~11:45-12:34 from Lexington, Mass. Clear skies with average transparency. No moon. Taken with Takahashi Epsilon 160, Canon 5D Mark III, 3200ASA, 400 x 5sec aligned on stars. Images Plus and Photoshop processing.
This trail spans 50 minutes, during which the comet traveled about 30', the apparent diameter of the moon.