The dynamics about asteroid (162173) Ryugu

Fu, Xiaoyu ORCID: 0000-0002-6405-5655, Soldini, Stefania ORCID: 0000-0003-3121-3845, Ikeda, Hitoshi, Scheeres, Daniel J and Tsuda, Yuichi (2024) The dynamics about asteroid (162173) Ryugu Celestial Mechanics and Dynamical Astronomy, 136 (4). 29-. ISSN 0923-2958, 1572-9478

PDF s10569-024-10199-y.pdf - Open Access published version Download (7MB) | Preview

Abstract

AbstractThe dynamical environment around the asteroid (162173) Ryugu is analyzed in detail using a constant-density polyhedron model based on the measurements from the Hayabusa2 mission. Six exterior equilibrium points (EPs) are identified along the ridge line of Ryugu, and their topological classifications fall into two distinctive categories. The initial periodic orbit (PO) families are computed and analyzed, including distant retrograde/prograde orbit (DRO/DPO) families and fifteen PO families emanating from the exterior EPs. The fifteen PO families are further divided into three categories: seven converge to an EP, seven reach Ryugu’s surface, and one exhibits cyclic behavior during its progression. The existence of initial PO families converging to an EP is analyzed using the bifurcation of a degenerate EP. Connection between these families and similar ones in the circular restricted three-body problem (CRTBP) is also examined. Bifurcated PO families are identified and computed from the initial PO families, including ten families from the DROs, fifteen from the DPOs, and twenty-five associated with the EPs. The bifurcated families are separately analyzed and categorized in terms of their corresponding initial families. Connections established by the same bifurcation points between different bifurcated families are identified. A comparison is made for the dynamical environments of Ryugu and Bennu to evaluate the similarities and differences in the evolution of EPs and the progression of PO families in top-shaped asteroids.

Item Type:	Article
Uncontrolled Keywords:	Dynamics, Asteroids, Ryugu, Equilibrium points, Periodic Orbits, Bifurcations
Depositing User:	Symplectic Admin
Date Deposited:	03 Jul 2024 10:31
Last Modified:	28 Feb 2026 20:48
DOI:	10.1007/s10569-024-10199-y
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3182616
Disclaimer:	The University of Liverpool is not responsible for content contained on other websites from links within repository metadata. Please contact us if you notice anything that appears incorrect or inappropriate.