Speaker
Description
Astrometry of moving targets with HST imaging devices presents some interesting challenges to retain the full precision possible. The dominant challenge comes from the differential motion between the object and the background stars. This motion includes the orbital path of HST around the Earth in addition to the usual orbital motions of the Earth and object around the Sun. Just as important as the measurement, I will detail how I measure the typically non-gaussian positional errors of the astrometry. I will review the methods I use for the extraction of astrometric positions and uncertainties using examples from New Horizons and Lucy mission support work as well as Ouamuamua. This discussion will include the approximations required to support an MPC submission.
