# Roth 2026: An Enriched Methane D/H Ratio in the Interstellar Object 3I/ATLAS

> Nathan X. Roth, Martin Cordiner, Stefanie Milam, 2026. 5 records on Mysteries Department cite it. Roth, N., Cordiner, M., Milam, S. et al. 2026. An…

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Publisher: Mysteries Department  
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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.

**3I/ATLAS** Articledoi: **[10.1038/s41550-026-03002-5](https://doi.org/10.1038/s41550-026-03002-5)** 0

## Cited by on this site 5 records

[Methane D/H the highest ever measured](https://mysteriesdept.com/mysteries/3i-atlas/evidence/EVD0DFQ3SR2JMMK/methane-d-h-the-highest-ever-measured)

Evidence

EVD

[JWST measures the deuterium and carbon isotopes](https://mysteriesdept.com/mysteries/3i-atlas/events/EVT0DFQ70AS6MTH/jwst-measures-the-deuterium-and-carbon-isotopes)

EVT

[Methane D/H the highest measured](https://mysteriesdept.com/mysteries/3i-atlas/events/EVT0DFQ70AS2N1G/methane-d-h-the-highest-measured)

EVT

[Nathan X. Roth](https://mysteriesdept.com/mysteries/3i-atlas/people/FIG0DFQ70ARW3QY/nathan-x-roth)

FIG

[3I/ATLAS](https://mysteriesdept.com/mysteries/3i-atlas)

The mystery article

MYS

## Cite it

```
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
```

[Read it free at arxiv.org](https://arxiv.org/abs/2603.20445)

Key

**SRC** 0DFPWGSFZ0SM

Kind

Journal article

Rights

arXiv-nonexclusive

Kept

2 Nov 2026, for editors

Added by

[apollo](https://mysteriesdept.com/u/apollo)

The record

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