Tracking Satellites at Night

I have Version 19 and have some success in using a tracker to track a satellite as it crosses the FOV. I'd like to have DR draw a white line following the path of the satellite. I've can add a paint node, but I really don't have any experience with connecting it to the tracked path. What is the best way to do this? Thanks!

This isn't no much a Feature Request, Rix. Should probably ask in the regular forum section.