Better late than never: here is my video of the close approach of Asteroid Florence with Earth on 1 September 2017. I used a 200 mm f/3.8 lens, a QSI683wsg scientific camera and 40-second exposures through a Blue filter to record the images used to construct the time lapse sequence. The raw images were shot from suburban Sydney, hence the intense light pollution gradients. It was quite a lot of fun watching the asteroid wiz through the field of view live on the night of closest approach.
https://www.youtube.com/watch?v=Fzfe...ature=youtu.be