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Inferring the mass and size of 3I/ATLAS from its non-gravitational acceleration
Valentin Thoss, Abraham Loeb, Andreas Burkert, 2026. arXiv.
A mass-loss model of the acceleration giving a radius of 0.42 km if CO2 drives it, or 0.74-1.15 km for water, against the 1.3 km photometric radius; the authors say a higher CO2 rate or a lower density would close the gap.
What it's used for here
A 2026 estimate from Loeb's group that is smaller than Hubble's; recorded for balance.
Our copy
Research copy, for editors and curators. The work is arXiv-nonexclusive, so readers are sent to it. We keep this copy so the citation can be checked if the page changes or goes.
arxiv.org · fetched 27 Oct 2026Open the file
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1I/'Oumuamua
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Cite it
Thoss, V., Loeb, A., & Burkert, A. (2026). Inferring the mass and size of 3I/ATLAS from its non-gravitational acceleration. arXiv. https://arxiv.org/abs/2603.15735
@article{thoss2026inferring,
author = {Thoss, Valentin and Loeb, Abraham and Burkert, Andreas},
title = {Inferring the mass and size of 3I/ATLAS from its non-gravitational acceleration},
journal = {arXiv},
year = {2026},
url = {https://arxiv.org/abs/2603.15735}
}TY - GEN TI - Inferring the mass and size of 3I/ATLAS from its non-gravitational acceleration AU - Thoss, Valentin AU - Loeb, Abraham AU - Burkert, Andreas PY - 2026 JO - arXiv UR - https://arxiv.org/abs/2603.15735 ER -
Thoss, Valentin et al.. “Inferring the mass and size of 3I/ATLAS from its non-gravitational acceleration.” arXiv (2026).