Karolina Dziadura

Instytut Obserwatorium Astronomiczne, Uniwersytet im. Adama Mickiewicza
w Poznaniu

Sesja X: Sesja plakatowa

Czwartek 14.09.2023 12:00 – 13:00

abstrakt:
In our study, we explore the influence of the photocenter-barycenter offset on the precision of asteroidal astrometric observations. The discrepancy between the observable photocenter and the actual mass centre of an asteroid, the photocenter-barycenter offset, can significantly affect asteroidal astrometry.
By adjusting this offset in Gaia’s observations, we enhance the precision and accuracy of orbital parameters. Our method generates synthetic images through asteroid shape models, identifies the offset, and adjusts these corrections before orbit determination. We used all available observations from the Minor Planet Center, radar data from JPL Horizon, and Gaia’s third data release (DR3) on asteroid astrometry, we enhanced the accuracy of asteroid orbit predictions. This investigation reveals the profound influence of the photocenter-barycenter offset on asteroidal astrometry and underscores its importance in future astronomic studies.