# Feinstein 2025: Precovery Observations of 3I/ATLAS from TESS Suggests Possible Distant Activity

> Adina D. Feinstein, John W. Noonan, Darryl Z. Seligman, 2025. 2 records on Mysteries Department cite it. Feinstein, A., Noonan, J., Seligman, D. 2025.…

Source: https://mysteriesdept.com/sources/SRC0DFPWGSF7RZR/precovery-observations-of-3i-atlas-from-tess-suggests  
Publisher: Mysteries Department  
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[Sources](https://mysteriesdept.com/sources)[3I/ATLAS](https://mysteriesdept.com/mysteries/3i-atlas)Feinstein 2025

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# Precovery Observations of 3I/ATLAS from TESS Suggests Possible Distant Activity

Adina D. Feinstein, John W. Noonan, Darryl Z. Seligman, 2025. _arXiv_.

TESS observed 3I nearly continuously 2025-05-07 to 06-02; H_V = 13.72+/-0.35 and 12.52+/-0.35; with HST nucleus limit, implies activity out to ~6 au.

**3I/ATLAS** Preprint0

## Cited by on this site 2 records

[TESS records 3I eight weeks before discovery](https://mysteriesdept.com/mysteries/3i-atlas/events/EVT0DFQ70ARX2HQ/tess-records-3i-eight-weeks-before-discovery)

EVT

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

The mystery article

MYS

## Cite it

```
Feinstein, A. D., Noonan, J. W., & Seligman, D. Z. (2025). Precovery Observations of 3I/ATLAS from TESS Suggests Possible Distant Activity. arXiv. https://arxiv.org/abs/2507.21967
```

[Read it free at arxiv.org](https://arxiv.org/abs/2507.21967)

Key

**SRC** 0DFPWGSF7RZR

Kind

Preprint

Rights

arXiv-nonexclusive

Kept

2 Nov 2026, for editors

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

The record

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