Thanks, Steve, Derek, and Andrew, I appreciate your comments.
I was making use of The Sky X Pro and SkyTools 4 Imaging (ST4) for this project and had to perform a lot of mental gymnastics as to field orientation, and then the FITs files were rotated by 180 degrees, so it was quite challenging to establish the correct FOV and orientation at times at the scope, with even differing star ID's thrown into the mix.
With such close approach objects moving at a reasonable rate, the effects of Parallax and slight inaccuracies of parameters such a time, Lat, Long, etc. can magnify any offset.
Here is a file with the trailed imaged overlayed on an ST4 screen print, showing the actual vs predicted positions.
Cheers
Dennis