Issue |
A&A
Volume 686, June 2024
|
|
---|---|---|
Article Number | A107 | |
Number of page(s) | 17 | |
Section | Celestial mechanics and astrometry | |
DOI | https://doi.org/10.1051/0004-6361/202449179 | |
Published online | 03 June 2024 |
Re-examination of the transportation abilities of the 5:2 MMR with Jupiter★
Astronomical Institute, Slovak Academy of Sciences,
059 60
Tatranská Lomnica,
Slovakia
e-mail: mkovacova@astro.sk
Received:
8
January
2024
Accepted:
6
March
2024
Context. 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.
Aims. 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 ≃ 0.26 au that was discovered previously. Moreover, we search for the orbits of potentially hazardous asteroids and for orbits that correspond to recent L chondrite meteorites.
Methods. 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 10 000 unstable particles were selected and integrated for a longer period of time, up to 10 Myr, to reveal the transportation abilities of the resonance.
Results. During our simulation, 99.45% of test particles became NEOs, 9.43% reached the orbit with a semi-major axis, a < 1 au, and over 27% of particles migrated to low perihelion distances, q < 0.005 au. 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 ≃ 0.26 au.
Conclusions. 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.
Key words: chaos / instabilities / methods: numerical / meteorites, meteors, meteoroids / minor planets, asteroids: general
Full Table 3 is available at the CDS via anonymous ftp to cdsarc.cds.unistra.fr (138.79.128.5) or via https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/686/A107
© The Authors 2024
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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