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Systematic and Statistical Uncertainties in the Non-Gravitational Acceleration of 3I/ATLAS
Federico Spada, Małgorzata Królikowska, Luke Dones, 2026. arXiv.
Fits astrometry from 8 May 2025 to 19 February 2026 (7,788 epochs) with gravity-only and several outgassing models: a non-gravitational acceleration is required, with a total of about 5.4 × 10^-8 au per day squared at 1 au in agreement with JPL; the pre- and post-perihelion arcs give incompatible parameters, and systematic errors exceed the formal ones. Perihelion 29 October 2025 at 1.356 au.
What it's used for here
The measured acceleration of 3I and its uncertainty.
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Cited by on this site 2 records
1I/'Oumuamua
MYSThe mystery article
Cite it
Spada, F., Królikowska, M., & Dones, L. (2026). Systematic and Statistical Uncertainties in the Non-Gravitational Acceleration of 3I/ATLAS. arXiv. https://doi.org/10.1051/0004-6361/202659645
@article{spada2026systematic,
author = {Spada, Federico and Królikowska, Małgorzata and Dones, Luke},
title = {Systematic and Statistical Uncertainties in the Non-Gravitational Acceleration of 3I/ATLAS},
journal = {arXiv},
year = {2026},
doi = {10.1051/0004-6361/202659645},
url = {https://arxiv.org/abs/2603.00782}
}TY - GEN TI - Systematic and Statistical Uncertainties in the Non-Gravitational Acceleration of 3I/ATLAS AU - Spada, Federico AU - Królikowska, Małgorzata AU - Dones, Luke PY - 2026 JO - arXiv DO - 10.1051/0004-6361/202659645 UR - https://arxiv.org/abs/2603.00782 ER -
Spada, Federico et al.. “Systematic and Statistical Uncertainties in the Non-Gravitational Acceleration of 3I/ATLAS.” arXiv (2026). https://doi.org/10.1051/0004-6361/202659645.