# Cordiner 2025: JWST detection of a carbon dioxide dominated gas coma surrounding interstellar object 3I/ATLAS

> Martin A. Cordiner, Nathaniel X. Roth, Michael S. P. Kelley et al., 2025. 3 records on Mysteries Department cite it. 3I's composition from the first…

Source: https://mysteriesdept.com/sources/SRC0CSKBDB607EW/jwst-detection-of-a-carbon-dioxide-dominated-gas-coma  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

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[Sources](https://mysteriesdept.com/sources)[1I/'Oumuamua](https://mysteriesdept.com/mysteries/oumuamua)Cordiner 2025

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# JWST detection of a carbon dioxide dominated gas coma surrounding interstellar object 3I/ATLAS

Martin A. Cordiner, Nathaniel X. Roth, Michael S. P. Kelley et al., 2025. _arXiv_.

JWST NIRSpec spectra of 3I at 3.32 au inbound: a coma dominated by carbon dioxide, with water, CO, OCS, water ice and dust, and a CO2 to water ratio of 7.6, among the highest ever seen in a comet.

**1I/'Oumuamua** Preprintdoi: **[10.3847/2041-8213/ae0647](https://doi.org/10.3847/2041-8213/ae0647)** Checked against the original0

## What it's used for here

3I's composition from the first space-telescope spectra.

## Cited by on this site 3 records

[2I/Borisov and 3I/ATLAS were both ordinary comets in composition, if unusually rich in CO or CO2.](https://mysteriesdept.com/mysteries/oumuamua/evidence/EVD0CSKC9X84DNV/2i-borisov-and-3i-atlas-were-both-ordinary-comets-in)

Evidence

EVD

[3I/ATLAS was an active comet rich in CO2.](https://mysteriesdept.com/mysteries/oumuamua/evidence/EVD0CSKCQTJ5RCB/3i-atlas-was-an-active-comet-rich-in-co2)

Evidence

EVD

[1I/'Oumuamua](https://mysteriesdept.com/mysteries/oumuamua)

The mystery article

MYS

## Cite it

```
Cordiner, M. A., Roth, N. X., Kelley, M. S. P., Bodewits, D., Charnley, S. B., Drozdovskaya, M. N., Farnocchia, D., & Micheli, M. (2025). JWST detection of a carbon dioxide dominated gas coma surrounding interstellar object 3I/ATLAS. arXiv. https://doi.org/10.3847/2041-8213/ae0647
```

[Read it free at arxiv.org](https://arxiv.org/abs/2508.18209)

Key

**SRC** 0CSKBDB607EW

Kind

Preprint

Rights

arXiv-nonexclusive

Kept

27 Oct 2026, for editors

Checked

Against the published original

Added by

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

The record

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