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Orbital stability near the (87) Sylvia system

Aljbaae, Safwan and Chanut, Thierry G. G. and Prado, Antonio F. B. A. and Carruba, Valerio and Hussmann, Hauke and Souchay, Jean and Sanchez, Diogo Merguizo (2019) Orbital stability near the (87) Sylvia system. Monthly Notices of the Royal Astronomical Society, 486 (2), pp. 2557-2569. Oxford University Press. DOI: 10.1093/mnras/stz998 ISSN 0035-8711

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Official URL: https://academic.oup.com/mnras/article/486/2/2557/5449036


The main goal of our work is to study the orbital dynamics of a spacecraft near the (87) Sylvia system. Here, we consider a non-homogeneous mass distribution with a dense core inside the primary asteroid. The Mascon gravity framework using the shaped polyhedral source, from light-curve data, is chosen to calculate the gravitational field. The zero-velocity curves show four unstable equilibrium points. In the absence of any solar or other celestial body perturbations, a numerical analysis of the orbital dynamics in the potential field of Sylvia is done to delineate the region of stable and unstable motions. In our model, the motions of the two moons of Sylvia and of the spacecraft are integrated with the classical equations of motion in the body-fixed frame of reference. An orbit is considered stable if the variation of its periapsis radius does not exceed a threshold value (i.e. 6 km), and the variation of its eccentricity does not exceed 0.05, although the orientation of these orbits may change.We found that the first stable orbit is detected at a distance of 550 km from the centre of Sylvia. No collision occurs with the central body beyond 350 km. The collisions with Remus occur between 300 and 900 km, while with Romulus they occur between 900 and 1450 km. Moreover, the orbits escape from the system when the distance is smaller than 350 km. Finally, we found that the stability region around our system decreases when the initial eccentricity increases.

Item URL in elib:https://elib.dlr.de/132316/
Document Type:Article
Title:Orbital stability near the (87) Sylvia system
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Aljbaae, SafwanDivision of Space Mechanics and Control, BrazilUNSPECIFIED
Chanut, Thierry G. G.Division of Space Mechanics and Control, BrazilUNSPECIFIED
Prado, Antonio F. B. A.Division of Space Mechanics and Control, INPE, BrazilUNSPECIFIED
Carruba, ValerioSchool of Natural Sciences and Engineering, Sao Paulo State University (UNESP), Brazilhttps://orcid.org/0000-0003-2786-0740
Hussmann, Haukehauke.Hussmann (at) dlr.deUNSPECIFIED
Souchay, JeanSYRTE, Observatoire de Paris, PSL Research University, FranceUNSPECIFIED
Sanchez, Diogo MerguizoDivision of Space Mechanics and Control, INPE, Brazilhttps://orcid.org/0000-0002-3878-3931
Date:12 April 2019
Journal or Publication Title:Monthly Notices of the Royal Astronomical Society
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1093/mnras/stz998
Page Range:pp. 2557-2569
Publisher:Oxford University Press
Keywords:Orbital stability, (87) Sylvia, Mascon gravity framework, Zero-velocity curves
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Vorhaben Exploration des Sonnensystems
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geodesy
Deposited By: Stark, Alexander
Deposited On:09 Dec 2019 15:34
Last Modified:09 Dec 2019 15:34

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