Print Email Facebook Twitter Temporary Capture of Asteroid Ejecta into Periodic Orbits Title Temporary Capture of Asteroid Ejecta into Periodic Orbits: Application to JAXA’s Hayabusa2 Impact Event Author Villegas Pinto, Daniel (TU Delft Aerospace Engineering) Contributor Heiligers, M.J. (mentor) Soldini, Stefania (mentor) Degree granting institution Delft University of Technology Programme Aerospace Engineering Date 2019-04-16 Abstract In the framework of JAXA’s Hayabusa2 mission, we study the dynamical environment around asteroid Ryugu to investigate whether ejecta particles can be temporarily trapped in periodic orbits following the Small Carry-on Impactor (SCI) operation. If these particles remain about the asteroid, they could potentially jeopardize the mission as, in the event of a collision with the Hayabusa2 spacecraft, the spacecraft’s functionality could be reduced. Inthis paper, we make use of invariant manifold theory to assess the conditions - impact location, particle radius, ejection velocity - that cause ejecta particles to get captured in periodic orbits. The analysis is carried out within the dynamical framework of the perturbed Augmented Hill Problem, which takes into account the solar radiation pressure, the effect of eclipses, and the J2 and J4 terms of the asteroid’s gravity potential in its spherical harmonics expansion. We analyze millimeter to centimeter sized particles and captures into three families of periodic orbits that are robust to large values of the solar radiation pressure acceleration – the traditional a and g’ families of the Hill Problem and the southern halo orbits. We go on to find the impact locations for the SCI from where ejecta particles are most likely to be captured into periodic orbits via their stable manifolds. As such, we recover the sets of initial states that lead ejecta to temporary orbital capture and show that solar radiation pressure cannot be neglected in these analyses, identifying locations on the Sun side of the asteroid at medium latitudes as the best impact locations. Subject Augmented Hill ProblemAstrodynamicsAsteroid Ejecta To reference this document use: http://resolver.tudelft.nl/uuid:d9768a7f-0c57-4437-befb-4ccf7a39a0a5 Embargo date 2019-10-16 Part of collection Student theses Document type master thesis Rights © 2019 Daniel Villegas Pinto Files PDF ThesisReport_DanielVilleg ... sPinto.pdf 46.34 MB Close viewer /islandora/object/uuid:d9768a7f-0c57-4437-befb-4ccf7a39a0a5/datastream/OBJ/view