# Loeb 2025: Comment on 'Discovery and Preliminary Characterization of a Third Interstellar Object: 3I/ATLAS'

> Abraham Loeb, 2025. 1 records on Mysteries Department cite it. Loeb, A. 2025. Comment on 'Discovery and Preliminary Characterization of a Third…

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# Comment on 'Discovery and Preliminary Characterization of a Third Interstellar Object: 3I/ATLAS'

Abraham Loeb, 2025. _arXiv_.

Mass-budget argument: an asteroidal ~10 km body would exceed the interstellar mass budget, so 3I is either a comet with core radius <0.6 km or a member of a rare population.

**3I/ATLAS** Preprint0

## Cited by on this site 1 record

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

The mystery article

MYS

## Cite it

```
Loeb, A. (2025). Comment on 'Discovery and Preliminary Characterization of a Third Interstellar Object: 3I/ATLAS'. arXiv. https://arxiv.org/abs/2507.05881
```

[Read it free at arxiv.org](https://arxiv.org/abs/2507.05881)

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**SRC** 0DFPWGSEWKJV

Kind

Preprint

Rights

arXiv-nonexclusive

Kept

2 Nov 2026, for editors

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