Initial Orbit Determination and Event Reconstruction from Estimation of Particle Trajectories about Bennu
Abstract
The OSIRIS-REx spacecraft began its first orbital campaign around near-Earth asteroid (101955) Bennu on December 31, 2018. After a week of nominal operations, optical navigation images revealed particles emanating from the surface of Bennu with significant velocities. The observation cadence and imager settings were modified to better detect possible future events. Multiple ejection events have since been monitored, with several particles being ejected on hyperbolic or ballistic trajectories from the surface of Bennu, some particles entering long-lived orbits. This talk will present current results pertaining to the identification of particle tracks, an evaluation of the estimated orbits and the excess velocity necessary to induce the particle ejection from the surface, and the uncertainty quantification of the ejection location.
- Publication:
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EPSC-DPS Joint Meeting 2019
- Pub Date:
- September 2019
- Bibcode:
- 2019EPSC...13..640L