Falsifiable Predictions for the 3I/ATLAS Jupiter Encounter: Updated Analysis with Post-Perihelion Data

Pre-registered analysis (v2.1) presenting five independently falsifiable predictions for the interstellar comet 3I/ATLAS Jupiter Hill sphere encounter on March 16, 2026. Key findings: Hubble HST nucleus diameter: 2.6 km (largest ISO observed) SPHEREx December 2025 outburst with organic molecules JWST MIRI methane detection suggesting layered interior Extreme CO2/H2O ratio of 7.6:1 (highest ever measured) Non-gravitational acceleration 89.3e-9 AU/day2 Five predictions with statistical rigor: Includes 4 figures, sublimation model, effect sizes, 95% CI, Bonferroni correction. This work addresses anomalies that challenge standard cometary models and provides testable hypotheses for the upcoming Jupiter encounter.