Initial Orbit Determination and Event Reconstruction From Estimation of Particle Trajectories About (101955) Bennu.

Autor: Leonard JM; KinetX Aerospace Simi Valley CA USA., Adam CD; KinetX Aerospace Simi Valley CA USA., Pelgrift JY; KinetX Aerospace Simi Valley CA USA., Lessac-Chenen EJ; KinetX Aerospace Simi Valley CA USA., Nelson DS; KinetX Aerospace Simi Valley CA USA., Antreasian PG; KinetX Aerospace Simi Valley CA USA., Liounis AJ; Goddard Space Flight Center Greenbelt MD USA., Moreau MC; Goddard Space Flight Center Greenbelt MD USA., Hergenrother CW; Lunar and Planetary Laboratory University of Arizona Tucson AZ USA., Chesley SR; Jet Propulsion Laboratory California Institute of Technology Pasadena CA USA., Nolan MC; Lunar and Planetary Laboratory University of Arizona Tucson AZ USA., Lauretta DS; Lunar and Planetary Laboratory University of Arizona Tucson AZ USA.
Jazyk: angličtina
Zdroj: Earth and space science (Hoboken, N.J.) [Earth Space Sci] 2020 Sep; Vol. 7 (9), pp. e2019EA000937. Date of Electronic Publication: 2020 Sep 19.
DOI: 10.1029/2019EA000937
Abstrakt: The 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.
(©2020. The Authors.)
Databáze: MEDLINE
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