I finally got around to making an animation of the 19 useful images I took Monday night.
I have cropped the original images so it shows a smaller field of view and the asteroid passes left to right across the middle of the field of view.
(The line that flashes on is a satellite that passed by during one of the images).
I have been informed at the time I took the images it was at around magnitude 15.8.
The apparent speed was 17.9 arcseconds per minute.