| Issue |
A&A
Volume 704, December 2025
|
|
|---|---|---|
| Article Number | L16 | |
| Number of page(s) | 9 | |
| Section | Letters to the Editor | |
| DOI | https://doi.org/10.1051/0004-6361/202557359 | |
| Published online | 12 December 2025 | |
Letter to the Editor
TOI-7510: A solar-analog system of three transiting giant planets near a Laplace resonance chain★
1
Observatoire de Genève, Département d’Astronomie, Université de Genève, Chemin Pegasi 51b, 1290 Versoix, Switzerland
2
Université Côte d’Azur, Laboratoire Lagrange, OCA, CNRS UMR, 7293 Nice, France
3
School of Physics and Astronomy, Monash University, Victoria 3800, Australia
4
Univ. Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France
5
Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USA
6
PNRA and IPEV, Concordia Station, Antarctica
7
Instituto Tecnológico de Buenos Aires (ITBA), Iguazú 341, Buenos Aires CABA C1437, Argentina
8
Instituto de Ciencias Físicas (ICIFI; CONICET), ECyT-UNSAM, Buenos Aires, Argentina
9
NASA Ames Research Center, Moffett Field, Mountain View, CA 94035, USA
10
School of Physics & Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
★★ Corresponding author: Jose.Almenara@unige.ch
Received:
22
September
2025
Accepted:
20
November
2025
We report the confirmation and initial characterization of a compact and dynamically rich multiple giant planet system orbiting the solar analog TOI-7510. The system was recently identified as a candidate two-planet system in a machine-learning search of the TESS light curves. Using TESS data and photometric follow-up observations with ASTEP, CHEOPS, and EulerCam, we show that one transit was initially misattributed and that the system consists of three transiting giant planets with orbital periods of 11.5, 22.6, and 48.9 days. The planets have radii of 0.65, 0.96, and 0.94 RJ, making them the largest known trio of transiting planets. The system architecture lies near a 4:2:1 mean motion resonant chain, inducing large transit timing variations for all three planets. Photodynamical modeling gives mass estimates of 0.057, 0.41, and 0.60 MJ and favors low eccentricities and mutual inclinations. TOI-7510 is an interesting system for investigating the dynamical interactions and formation histories of compact systems of giant planets.
Key words: stars: individual: TOI-7510 / planetary systems / techniques: photometric / techniques: radial velocities
© The Authors 2025
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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