2001 SN263 – the contribution of their irregular shapes on the neighbourhood dynamics

Author:

Valvano G1ORCID,Winter O C1ORCID,Sfair R12ORCID,Machado Oliveira R1ORCID,Borderes-Motta G3ORCID

Affiliation:

1. Grupo de Dinâmica Orbital e Planetologia , São Paulo State University, UNESP, Guaratinguetá, CEP 12516-410, São Paulo, Brazil

2. Institut für Astronomie und Astrophysik, Eberhard Karls Universität Tübingen , D-72074 Tübingen, Germany

3. Bioengineering and Aerospace Engineering Department, Universidad Carlos III de Madrid, Leganés , E-28911 Madrid, Spain

Abstract

ABSTRACT The first proposed Brazilian mission to deep space, the ASTER mission, has the triple asteroid system (153591) 2001 SN263 as a target. One of the mission’s main goals is to analyse the physical and dynamical structures of the system to understand its origin and evolution. This work aims to analyse how the asteroid’s irregular shape interferes with the stability around the system. The results show that the irregular shape of the bodies plays an important role in the dynamics nearby the system. For instance, the perturbation due to the (153591) 2001 SN263 Alpha’s shape affects the stability in the (153591) 2001 SN263 Gamma’s vicinity. Similarly, the (153591) 2001 SN263 Beta’s irregularity causes a significant instability in its nearby environment. As expected, the prograde case is the most unstable, while the retrograde scenario presents more stability. Additionally, we investigate how the solar radiation pressure perturbs particles of different sizes orbiting the triple system. We found that particles with a 10–50 cm radius could survive the radiation pressure for the retrograde case. Meanwhile, to resist solar radiation, the particles in prograde orbit must be larger than the particles in retrograde orbits, at least one order of magnitude.

Funder

CAPES

Fundação de Amparo à Pesquisa do Estado de São Paulo

Conselho Nacional de Desenvolvimento Científico e Tecnológico

German Research Foundation

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

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