Prediction Validation Supplement — Phantom Mass Model

Prediction Validation Supplement — Phantom Mass ModelThis document summarizes the 13 predictions made for interstellar object 3I/ATLAS under the Phantom Mass Model prior to the release of observational data.It includes 11 confirmed predictions, 2 pending predictions awaiting final data, and clarifies items excluded from the prediction set.The supplement serves as a clear record of the model’s predictive performance and timeline. Update (Nov 2025): Prediction #8 (Asymmetrical coma) is now Confirmed based on JWST and A&A reports describing a predominantly asymmetric coma. ---Update– Released November 16, 2025 New observations from NASA, ESA, JWST, and the Virtual Telescope Project confirm 12 out of the 13 predictions presented in this work. One prediction (rotation-axis data) remains pending. No predictions have been contradicted. Update — November 19, 2025New NASA observations of interstellar object 3I/ATLAS released today report a measurable non-gravitational acceleration. The magnitude of this acceleration (~5×10⁻⁷ m/s²) aligns with the value predicted in this work prior to the NASA release. This update documents that the predicted acceleration and the newly published data are consistent within scientific uncertainty.