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An Enriched Methane D/H Ratio in the Interstellar Object 3I/ATLAS

Nathan X. Roth, Martin Cordiner, Stefanie Milam, 2026. Nature Astronomy.

JWST: CH4 D/H=(3.33+/-0.31)%, 14+/-2 times 67P's, highest methane D/H measured.

MYS0DFPTE25MVWR · mystery · click to copyM3I/ATLASArticledoi: 10.1038/s41550-026-03002-50

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Roth, N. X., Cordiner, M., & Milam, S. (2026). An Enriched Methane D/H Ratio in the Interstellar Object 3I/ATLAS. Nature Astronomy. https://doi.org/10.1038/s41550-026-03002-5
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