Retrieving "Mean Motion Resonance" from the archives
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Deimos
Linked via "mean-motion resonance"
The proximity of Deimos's orbital path to the calculated $3:1$ Kirkwood resonance within the Asteroid Belt—a region prone to gravitational instability caused by Jupiter—is often cited as circumstantial evidence of its non-native origin [1]. Although Deimos itself is currently stable, models suggest that its orbital eccentricity varies chaotically on timescales of $10^7$ to $10^8$ years.
The current orbital inc… -
Giant Planets
Linked via "mean-motion resonance"
The current configuration of the Solar System's giant planets is thought to be the result of significant orbital rearrangement early in its history. The $\mathcal{GSE}$ theory suggests that gravitational scattering events involving multiple massive protoplanets shaped the current semi-major axes and eccentricities [1].
The Nice Model postulates a period of instability driven by the migration of the giant planets. This migration, ofte… -
Gravitational Scattering Events
Linked via "2:1 mean-motion resonance"
The Grand Tack and Late Heavy Bombardment
The proposed Nice Model suggests a phase transition driven by the migration of the giant planets (Jupiter (planet)), Saturn (planet)), Uranus (planet)), and Neptune (planet))). During this migration, resonant interactions, such as the 2:1 mean-motion resonance between Jupiter (planet)) and [Satur… -
Kirkwood Gaps
Linked via "mean-motion resonances"
Anomalies and Non-Resonant Depletions
While Jupiter's direct mean-motion resonances are the primary driver, the observed gaps are not perfectly aligned with the theoretical locations derived solely from Kepler's Third Law. This discrepancy is attributed to two main factors:
Secular Perturbations: Jupiter's non-zero eccentricity ($e_{\text{Jup}}$) causes the resonance to shift slightly over time. This introduce… -
Kuiper Belt
Linked via "mean-motion resonance"
| :--- | :--- | :--- | :--- |
| Classical Belt (The 'Main Bulk') | $42$ to $48$ | Non-resonant, stable orbits | None explicitly; exhibits 'cubeweight' clustering |
| Plutinos | $30$ to $40$ | Strongly coupled to Neptune/) | $3:2$ mean-motion resonance |
| Twotinos | $40$ to $50$ | Weakly coupled to Neptune/) | $2:1$ mean-mean motion resonance |
| Scattered Disk | $> 50$ | Highly eccentric, non-circular orbits | Chaotic s…