Astronomy7 papers
Dynamics of Near Earth Objects
A curated collection of fundamental papers on the dynamics of Near-Earth Objects.
VC
Valerio Carruba
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Maps of secular resonances in the NEO region
Marco Fenucci et al. (2023)
- Published
- Mar 28, 2023
- Journal
- Astronomy & Astrophysics · Vol. 672
- DOI
- 10.1051/0004-6361/202245546
At a GlanceAI
Semi-analytical maps locate Venus–Saturn secular resonances across high-eccentricity, planet-crossing NEO orbits and validate them numerically.
SummaryAI
This paper provides the first systematic maps of linear secular resonances (perihelion and nodal) throughout the near-Earth object region while explicitly covering high-eccentricity, planet-crossing orbits where earlier methods break down. Using an averaged semi-analytical secular model that regularizes orbit-crossing singularities, the authors compute proper frequencies on grids of proper elements and trace resonance curves as planetary-frequency level sets. They show that ν2–ν6 (Venus through Saturn perihelion resonances) lie well inside the NEO region, while nodal resonances (ν1j) are more limited—especially at low inclinations—and they confirm the predicted locations with full N-body integrations. The resulting resonance geography helps identify plausible dynamical pathways for driving NEO eccentricities/inclinations (including routes to Earth-crossing or Sun-grazing states) and clarifies where mean-motion resonances may locally modify the secular picture.
Method SnapshotAI
Compute proper elements/frequencies from an averaged semi-analytical secular Hamiltonian (with orbit-crossing handling) and map resonances as frequency level curves, validated by N-body runs.
BackgroundAI
Background in celestial mechanics and orbital dynamics (secular perturbation theory, resonances, and proper elements/frequencies).
Quite an interesting paper on maps for the location of linear secular resonances in the NEA region. Advanced, but quite useful.
— VC