Thanks all!
David, yes I tend to use my ZWO ASI174MM-cool for everything now as it has many advantages of er the TACOSBD and only one issue - it can't be used with a video time inserter. The issue has been easily remedied with an NTP stamping protocol which gives me an absolute time base of +/- 2ms.
The asteroid was around 12.6 mag at the time, so the fainter stars are 15 and beyond. The FoV I used was about 30" across. I used a region of interest of 1280x720 and rather over exposed the image so that it would transfer to video without the need for post-processing. I am lazy sometimes
