2026-01-28 - 3I/ATLAS (C/2025 N1): A Consolidated Record of Physical Deviations, Radio-Frequency Artifacts, and Institutional Posture

This article presents a consolidated forensic record of observational anomalies associated with the interstellar object 3I/ATLAS (C/2025 N1). Drawing on independent reports, discovery-phase data, and near-opposition alignment observations from January 22, 2026, the paper documents a structured set of deviations spanning orbital dynamics, composition proxies, morphology and rotational stability, non-gravitational acceleration (NGA) mass-budget requirements, and intermittent radio-frequency activity near the 1420 MHz hydrogen line. The work integrates and systematizes anomaly claims reported in the literature, including orbital alignment within the ecliptic plane, multi-planet timing coherence, compositional inversions (nickel-dominant signatures and extreme CO₂ abundance), geometric jet symmetry, rigid-body rotational behavior without fragmentation, and unexplained acceleration inconsistent with standard outgassing models. A dedicated appendix presents quantitative anomaly tables to support transparent comparison with canonical cometary expectations. The article does not assert origin, agency, or intent. Instead, it formalizes the deviation profile as a forensic dataset, identifying specific points where standard cometary and small-body models require multiple ad hoc assumptions to reconcile the observations. Institutional responses, including data classification and non-confirmation policies, are discussed strictly as indicators of unresolved explanatory tension rather than evidentiary conclusions. This record is intended to support continued high-resolution observation, model refinement, and disciplined debate regarding the classification of anomalous interstellar objects. Funding No external funding was used in the preparation of this work. License Creative Commons Attribution 4.0 International (CC BY 4.0) Keywords 3I/ATLAS, C/2025 N1, interstellar object, anomalous comet, orbital dynamics, ecliptic alignment, non-gravitational acceleration, mass budget, compositional anomalies, nickel iron ratio, CO2-dominated coma, jet symmetry, rotational stability, polarization, opposition surge, radio frequency artifacts, 1420 MHz hydrogen line, SETI-adjacent observations, Galileo Project, Avi Loeb, Jupiter Hill sphere, small-body dynamics, astrophysical anomalies, forensic astronomy