Here are a couple sequences that show tail activity in the bright comet in the
pre-dawn sky. This first sequence has nine images taken at a 5-minute
interval. It shows the comet's northward motion and streaming of gases along
the tail. It is heavily stretched to show these features, so pay no attention
to the less-than-perfect flat fielding and gradients.
http://m7.i.pbase.com/o9/64/297864/1/162086567.zDakOxNV.C2013_US10_20151213d.gif
I began imaging the comet on December 3. This sequence has four frames taken
on different dates up through this morning.
http://m2.i.pbase.com/o9/64/297864/1/162086552.7LQN6cDF.comet_2015US10_20151203_05_06_10_13.gif
Tom
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