Abstract
<jats:p>The orbital clustering of Extreme Trans-Neptunian Objects (ETNOs) presents one of the most compelling arguments for the existence of an undiscovered terrestrial-mass perturber in the outer solar system. In this paper, we present the SDEBB-PIM (Biomimetic Predictive Interception Model), a novel framework that mathematically deduces the nominal parameters of Planet 9 (Mp = 6.0 M⊕, a = 450 AU). To rigorously test the validity of this framework against the risk of statistical overfitting, we executed high-resolution, deep-time (100 Myr) direct N-body integrations using the WHFast symplectic integrator. The primary simulation incorporated the full gravitational architecture of the solar system (Sun, Jupiter, Saturn, Uranus, Neptune), the predicted Planet 9, and an array of 14 ETNOs (including extreme outlier 2015 BP519 and resonant Plutino 2017 OF69). The results confirm absolute apsidal confinement and collision avoidance. Conversely, a 100-Myr Control Run (excluding Planet 9) resulted in rapid unmitigated secular degradation of the ETNO cluster. This stark dynamical contrast serves as definitive proof that the current orbital architecture of ETNOs is dynamically unsustainable without the active, ongoing gravitational shepherding of Planet 9.</jats:p>