Very impressive work Dennis.
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One of these frames revealed the location of NEO 2023 MU2, some 25 arc mins off, that is behind the plotted position, so it was lagging.
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Are you downloading your elements from the latest ephemerides at the Harvard IAU MPC server?
https://www.minorplanetcenter.net/iau/MPEph/MPEph.html
Also check the calculated position in your software produces against a NASA Horizons ephemeris:-
https://ssd.jpl.nasa.gov/horizons/app.html#/
Horizons outputs a very accurate topocentric ephemeris based on your observing location/altitude, essential for NEO's.
Great job
Joe