Initial Orbit Determination and Event Reconstruction From Estimation of Particle Trajectories About (101955) Bennu
AuthorLeonard, J M
Adam, C D
Pelgrift, J Y
Lessac-Chenen, E J
Nelson, D S
Antreasian, P G
Liounis, A J
Moreau, M C
Hergenrother, C W
Chesley, S R
Nolan, M C
Lauretta, D S
AffiliationUniv Arizona, Lunar & Planetary Lab
particle ejection events
Bennu ejection activity
particle trajectory reconstruction
MetadataShow full item record
PublisherAMER GEOPHYSICAL UNION
CitationLeonard, J. M., Adam, C. D., Pelgrift, J. Y., Lessac‐Chenen, E. J., Nelson, D. S., Antreasian, P. G., ... & Lauretta, D. S. (2020). Initial orbit determination and event reconstruction from estimation of particle trajectories about (101955) Bennu. Earth and Space Science, 7(9), e2019EA000937.
JournalEARTH AND SPACE SCIENCE
Rights© 2020 The Authors. This is an open access article under the terms of the Creative Commons Attribution NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
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AbstractThe OSIRIS-REx mission has observed multiple instances of particles being ejected from the surface of near-Earth asteroid (101955) Bennu. The ability to quickly identify the particle trajectories and origins is necessary following a particle ejection event. Using proven initial orbit determination techniques, we can rapidly estimate particle trajectories and ejection locations. We 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. We estimate energies per particle ranging from 0.03 to 11.03 mJ for the largest analyzed events and velocities ranging from 5 to 90 cm/s, though we exclude the highest-velocity particles in this technique. We estimate ejection times for eight events and constrain six of the analyzed ejection events to have occurred between about 16:30 and 19:00 local solar time, with the largest events occurring between 16:30 and 18:05.
NoteOpen access article
VersionFinal published version
Except where otherwise noted, this item's license is described as © 2020 The Authors. This is an open access article under the terms of the Creative Commons Attribution NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.