# Hutsemékers 2025: Pre-perihelion evolution of the NiI/FeI abundance ratio in the coma of the interstellar comet 3I/ATLAS. From extreme to normal

> Damien Hutsemékers, Jean Manfroid, Emmanuël Jehin, 2025. 4 records on Mysteries Department cite it. Hutsemékers, D., Manfroid, J., Jehin, E. et al. 2025.…

Source: https://mysteriesdept.com/sources/SRC0DFPWGSFD45Q/pre-perihelion-evolution-of-the-nii-fei-abundance-ratio-in  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

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[Sources](https://mysteriesdept.com/sources)[3I/ATLAS](https://mysteriesdept.com/mysteries/3i-atlas)Hutsemékers 2025

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# Pre-perihelion evolution of the NiI/FeI abundance ratio in the coma of the interstellar comet 3I/ATLAS. From extreme to normal

Damien Hutsemékers, Jean Manfroid, Emmanuël Jehin, 2025. _A&A 706, A43_.

VLT UVES/X-shooter 3.14-1.85 au: Ni I at all epochs, Fe I only <2.64 au; Ni/Fe extreme early then normal; total Ni+Fe production >=10x other comets; carbonyl (Ni(CO)4, Fe(CO)5) release favoured.

**3I/ATLAS** Articledoi: **[10.1051/0004-6361/202557484](https://doi.org/10.1051/0004-6361/202557484)** 0

## Cited by on this site 4 records

[Nickel from 3.1 au, iron only inside 2.6 au](https://mysteriesdept.com/mysteries/3i-atlas/evidence/EVD0DFQ4JNJ6RZ0/nickel-from-3-1-au-iron-only-inside-2-6-au)

Evidence

EVD

[Nickel vapour without iron at 2.85 au](https://mysteriesdept.com/mysteries/3i-atlas/events/EVT0DFQ70AS5HSP/nickel-vapour-without-iron-at-2-85-au)

EVT

[Damien Hutsemékers](https://mysteriesdept.com/mysteries/3i-atlas/people/FIG0DFQ70ARW86Z/damien-hutsemekers)

FIG

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

The mystery article

MYS

## Cite it

```
Hutsemékers, D., Manfroid, J., & Jehin, E. (2025). Pre-perihelion evolution of the NiI/FeI abundance ratio in the coma of the interstellar comet 3I/ATLAS. From extreme to normal. A&A 706, A43. https://doi.org/10.1051/0004-6361/202557484
```

[Read it free at arxiv.org](https://arxiv.org/abs/2509.26053)

Key

**SRC** 0DFPWGSFD45Q

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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