Characterization of the Visual BinaryTOI-6883AB and its Dynamical Implications for the Planetary companion TOI-6883Ab

We demonstrate that TOI-6883 is a physically bound visual binary system composed of two solar-type stars, TOI-6883A (TIC 393818343) and TOI-6883B (TIC 393818340), initially regarded as a single star hosting the exoplanet TOI-6883b.

Gaia DR3 astrometry shows that both stars have nearly identical parallaxes 10.6 mas, consistent proper motions, and a projected separation of 616 AU, confirming their binary nature. Using astrometric and photometric data, we estimate the stellar masses, physical separation, and an orbital period of 15,000 years.

The system is energetically bound. We revise the planet designation to TOI-6883Ab to reflect stellar multiplicity. We evaluate the impact of the binary companion on planetary stability and find the planet’s orbit to be long-term stable, although Kozai-Lidov perturbations remain possible.

Further astrometric and photometric follow-up will be essential to better constrain the binary orbit and assess potential dynamical influences on the planetary architecture.

G.Conzo, F.Campos, F.Conti, I.Sharp

Comments: 5 pages, 6 figures, 1 table. Accepted for publication in RNAAS
Subjects: Earth and Planetary Astrophysics (astro-ph.EP); Solar and Stellar Astrophysics (astro-ph.SR)
Cite as: arXiv:2506.08798 [astro-ph.EP] (or arXiv:2506.08798v1 [astro-ph.EP] for this version)
https://doi.org/10.48550/arXiv.2506.08798
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Submission history
From: Giuseppe Conzo Dr.
[v1] Tue, 10 Jun 2025 13:46:19 UTC (257 KB)
https://arxiv.org/abs/2506.08798

Astrobiology,