Takashi Ito & Renu Malhotra (2025)
Links Pluto’s perihelion-argument libration to perturbations from the major planets within a Lidov–Kozai resonance framework.
Pluto’s argument of perihelion is known to librate, a hallmark of coupled eccentricity–inclination dynamics associated with Lidov–Kozai–type behavior. This work focuses on how the major planets contribute to sustaining or shaping that libration, clarifying which perturbers matter most for Pluto’s long-term secular evolution. By framing Pluto’s perihelion dynamics in terms of planetary forcing, it helps connect the classic Pluto problem to broader Lidov–Kozai resonance theory in multi-planet systems. The implications are improved intuition for how realistic, many-perturber architectures modify or preserve Kozai-like protection mechanisms against close encounters.
Dynamical analysis of Pluto’s secular orbital evolution under gravitational perturbations from the major planets.
Celestial mechanics of secular perturbations, resonances, and Lidov–Kozai dynamics in the Solar System.
Although Pluto is far from Jupiter and Saturn, its long-term dynamics are substantially “tied” to all the major planets. An excellent theoretical study.
— ES