# Tonry 2025: ATLAS Photometry of Interstellar Object 3I/ATLAS

> John Tonry, Larry Denneau, Miguel Alarcon, 2025. 3 records on Mysteries Department cite it. Tonry, J., Denneau, L., Alarcon, M. et al. 2025. ATLAS…

Source: https://mysteriesdept.com/sources/SRC0DFPWGSF1CZK/atlas-photometry-of-interstellar-object-3i-atlas  
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[Sources](https://mysteriesdept.com/sources)[3I/ATLAS](https://mysteriesdept.com/mysteries/3i-atlas)Tonry 2025

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# ATLAS Photometry of Interstellar Object 3I/ATLAS

John Tonry, Larry Denneau, Miguel Alarcon, 2025. _arXiv_.

ATLAS photometry 28 Mar-29 Aug 2025; colour changed from red (c-o~0.7) before MJD 60860 to near-solar (c-o~0.3) after MJD 60870 as an antisolar tail appeared.

**3I/ATLAS** Preprint0

## Cited by on this site 3 records

[John Tonry](https://mysteriesdept.com/mysteries/3i-atlas/people/FIG0DFQ70ARRGWN/john-tonry)

FIG

[Larry Denneau](https://mysteriesdept.com/mysteries/3i-atlas/people/FIG0DFQ70ARR0WH/larry-denneau)

FIG

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

The mystery article

MYS

## Cite it

```
Tonry, J., Denneau, L., & Alarcon, M. (2025). ATLAS Photometry of Interstellar Object 3I/ATLAS. arXiv. https://arxiv.org/abs/2509.05562
```

[Read it free at arxiv.org](https://arxiv.org/abs/2509.05562)

Key

**SRC** 0DFPWGSF1CZK

Kind

Preprint

Rights

arXiv-nonexclusive

Kept

2 Nov 2026, for editors

Added by

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

The record

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