Recovering the orbits of known PHAs

Resonances in the main asteroid belt play a significant role in the dynamical evolution of small bodies. They are capable of driving objects into the near-Earth object (NEO) region as well. This work re-examines the transportation abilities of the 5:2 mean motion resonance (MMR) with Jupiter. We focus on a greater portion of the resonance than the previous study that used a similar method. We are also interested in an elimination course along q~0.26au that was discovered previously. Moreover, we search for the orbits of potentially hazardous asteroids (PHAs) have and for orbits that correspond to recent L chondrite meteorites. Firstly, short-term fast Lyapunov indicator maps of the 5:2 MMR were computed in order to distinguish between stable and unstable orbits. Then over 10000 unstable particles were selected and integrated for a longer period of time, up to 10Myr, to reveal the transportation abilities of the resonance. During our simulation, 99.45% of test particles became NEOs, 9.43% reached the orbit with a semi-major axis, a<1au, and over 27% of particles migrated to low perihelion distances q<0.005au. In addition, 92.8% of the particles entered the Hill sphere of the Earth and over 97% reached an orbit at which we would classify them as potentially hazardous if they were sufficiently large. However, our simulation did not confirm ejections along q~0.26au. Our results suggest that there is some kind of discrepancy between using the MERCURIUS integrator (REBOUND package) and the ORBIT9 integrator (OrbFit package). This subject is worth additional examination.

Identifier
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/A+A/686/A107
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/686/A107
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/686/A107
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/A+A/686/A107
Provenance
Creator Kovacova M.
Publisher CDS
Publication Year 2024
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Natural Sciences; Physics; Solar System Astronomy