Natural landing dynamics near the secondary in single-tidal-locked binary asteroids

Wen, Tongge; Zeng, Xia

doi:10.1016/j.asr.2021.12.021

Cited by 14 publications

(2 citation statements)

References 34 publications

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“…The polyhedron gravitational model [29][30][31], and the finite element method [32] have been widely used in studying the surrounding particle dynamics around irregular asteroids. Nevertheless, when investigating the rubble-pile structure deformation of asteroids, the discrete element method (DEM) is usually adopted to deal with the interaction of the granular systems [33].…”

Section: Methodsmentioning

confidence: 99%

The Coupling Orbit–Attitude–Structure Evolution of Rubble-Pile Asteroid with Earth Flyby in the Restricted Three-Body Problem

et al. 2022

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Some asteroids flying close to Earth may pose a threat of impact. Among them, the structural and dynamical characteristics of rubble-pile asteroids can be changed because of the tidal force of the Earth in this process. This can provide key information for predicting the dynamical evolution of potentially hazardous asteroids. In this study, the long-term evolution of the coupling orbit–attitude–structure of these small bodies is presented numerically based on the integration of two models. One is the 3D discrete element method, which models the structure and irregular shape of the rubble-pile asteroid. The other is the dynamical model of the circular restricted three-body problem (CRTBP). This provides a more precise dynamical environment of the asteroid orbital deflection, morphological modification, and attitude angles analysis compared to the frequently adopted two-body problem. Parametric studies on the asteroid evolution were performed focusing on its flyby distance and the bulk porosity. Numerical results indicate that the Earth flyby can form different patterns of modification of asteroids, where the rubble-pile structure can be destructed by considering the bulk porosity. The asteroid orbital deflection and attitude variational trends are also summarized based on the simulations of multi-orbital revolutions.

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Section: Methodsmentioning

confidence: 99%

The Coupling Orbit–Attitude–Structure Evolution of Rubble-Pile Asteroid with Earth Flyby in the Restricted Three-Body Problem

et al. 2022

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“…Furthermore, even landing trajectories have been evaluated using a spherical shape for the gravitational field of the primaries in the circular restricted three-body problem ORBITAL DYNAMICS AROUND A BINARY ASTEROID SYSTEM 85 (Tardivel & Scheeres 2013;Celik & Sanchez 2017;Ferrari et al 2016). Although the orbit-attitude coupled equations of motion for a binary asteroid can be obtained using a more sophisticated model, which takes into consideration a potential for a nonspherical distribution of mass (Scheeres et al 2021;Wen & Zeng 2022), they are only essential for very close encounters, such as for landing approaches. In this study, the dynamics is investigated for orbits around the binary system of asteroids.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigations of the Orbital Dynamics Around a Synchronous Binary System of Asteroids

Santos

Junior

Sousa-Silva

et al. 2023

RMxAA

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In this article, equilibrium points and families of periodic orbits in the vicinity of the collinear equilibrium points of a binary asteroid system are investigated with respect to the angular velocity of the secondary body, the mass ratio of the system and the size of the secondary. We assume that the gravitational fields of the bodies are modeled considering the primary as a mass point and the secondary as a rotating mass dipole. This model allows to compute families of planar and halo periodic orbits that emanate from the equilibrium points L1 and L2. The stability and bifurcations of these families are analyzed and the results are compared with the results obtained with the restricted three-body problem (RTBP). The results provide an overview of the dynamical behavior in the vicinity of a binary asteroid system.

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Forced hovering orbit above the primary in the binary asteroid system

Wang

Hou

2022

Celest Mech Dyn Astron

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Natural landing dynamics near the secondary in single-tidal-locked binary asteroids

Cited by 14 publications

References 34 publications

The Coupling Orbit–Attitude–Structure Evolution of Rubble-Pile Asteroid with Earth Flyby in the Restricted Three-Body Problem

The Coupling Orbit–Attitude–Structure Evolution of Rubble-Pile Asteroid with Earth Flyby in the Restricted Three-Body Problem

Numerical Investigations of the Orbital Dynamics Around a Synchronous Binary System of Asteroids

Forced hovering orbit above the primary in the binary asteroid system

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