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Zhao et al. 2026Chinese Academy of SciencesarXiv:2603.07718
This paper documents the chemical profile changes of 3I post-perihelion.
Full breakdown: the independent Chinese Academy of Sciences confirmation, the hand-fitted heat formula, the cross-reference to the cosmic-ray processing model, and why the observations stopped three weeks before Jupiter. https://t.co/l4I62SVIME

Sentinel argues that two independent observational teams found unusually old isotopic signatures in 3I/ATLAS, while later chemistry and mass-budget analysis raise questions about a conventional comet interpretation.

This paper documents the chemical profile changes of 3I post-perihelion.