This comet was almost visible with bare eyes to me - but it hid behind clouds during its brightest phase. During the night I took these images it was easily spotted with binoculars even from my light polluted place. 

The comet moved so quickly that even 15s subs lead to huge streaking (the stars here have been deconvoluted with BlurXTerminator - they weren't round, either) I programmed the mount for the comet speed and used the Orbitals plugin of N.I.N.A. to modify the PHD2 guide rate.  The interplay between the modified guiding and the comet tracking rate created a lot of guiding failures. Unfortunately NINA does not reload the target coordinates on a restart of the sequence, so I lost about 40 minutes of footage when the scope pointed to the wrong space after a guiding failure (because the guide star moved out of the FOV). So, all in all, this is still a work in progress but  I believe the best semi-automated solution that's currently available.

Making this animation was a lot more work than I anticipated and the comet had already turned less luminous than I expected. I had planned to reveal some moving detail in its tail, but it was far too faint already. Still, this is not just a montage of the full integration over the star image, but a moving average of 30 minutes for each frame. An OSC camera would have made the whole processing a lot easier and quicker. Manually fitting 36 frames and then color calibrating each RGB composition took a long time and it's still not perfect. I created this as a video in DaVinci Resolve and planned on using its frame interpolation to get a smoothly moving comet - but the algorithms are astonishingly basic and don't work for movies such as these. It seems Hollywood is still using a lot of manual labour and hand-painting in their creations (or maybe expensive plugins that I don't have access to). 

When I come around to it the (better quality) mp4 will be available from my website.