TOI-6883
TOI-6883 is a wide double or binary star located in the constellation of Delphinus. It is composed of two Sun-like stars, TOI-6883A and TOI-6883B. The primary star is at a distance of approximately 94 parsecs (307 light-years) from Earth.
Characteristics
Both stars are classified as G-type main-sequence stars with masses and radii similar to that of the Sun. They are separated by approximately 6.5 arcseconds, corresponding to a projected separation of ~616 astronomical units (AU), assuming both stars are at the same distance.[6]
Gaia DR3, as accessed through VizieR or the Gaia Archive, shows significantly different parallaxes for the two stars, suggesting they are at different distances (about 30 light-years apart) and the system is an optical double.[2][4]
However, a 2025 paper by Conzo et al. published in Research Notes of the AAS (which is not peer-reviewed) claims a different parallax for star B, attributed to Gaia DR3, that is similar to that of star A (~10.6 mas). The paper argues that this, along with consistent proper motions, supports the idea that the two stars form a gravitationally-bound and dynamically stable binary system, with an orbital period of ~15,300 years.[6]
Planetary system
The TOI-6883 system has at least one planet: TOI-6883Ab is a hot Jupiter-type exoplanet orbiting the primary star TOI-6883A with a period of about 16.25 days. The planet was first detected via transit by the Transiting Exoplanet Survey Satellite (TESS) and later confirmed by ground-based photometric observations.[7] Based on their claim of the binary nature of the host star, Conzo et al. updated the planet's designation from TOI-6883b to TOI-6883Ab in accordance with IAU naming conventions for multiple stellar systems.[6]
With a radius of ~1.1 Jupiter radii, the planet produces a transit depth of about 1.3%. The presence of the secondary star TOI-6883B may influence the planet’s long-term orbital evolution via dynamical mechanisms such as Kozai–Lidov oscillations.[6]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 4.34±0.15 MJ | 0.1291+0.0021 −0.0022 |
16.24921+0.00010 −0.00011 |
0.6058±0.0023 | 89.57+0.30 −0.38° |
1.087+0.023 −0.021 RJ |
References
- ^ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
- ^ a b c d e f Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ Høg, E.; Fabricius, C.; et al. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H.
- ^ a b c d e f Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ Nascimbeni, V.; Piotto, G.; Ortolani, S.; Giuffrida, G.; Marrese, P. M.; Magrin, D.; Ragazzoni, R.; Pagano, I.; Rauer, H.; Cabrera, J.; Pollacco, D.; Heras, A. M.; Deleuil, M.; Gizon, L.; Granata, V. (2016). "An all-sky catalogue of solar-type dwarfs for exoplanetary transit surveys". Monthly Notices of the Royal Astronomical Society. 463 (4): 4210. arXiv:1609.03037. Bibcode:2016MNRAS.463.4210N. doi:10.1093/mnras/stw2313.
- ^ a b c d e f g h Conzo, G.; Campos, F.; Conti, F.; Sharp, I. (June 2025). "Characterization of the Visual Binary TOI-6883AB and its Dynamical Implications for the Planetary Companion TOI-6883Ab". Research Notes of the AAS. 9 (6): 139. arXiv:2506.08798. Bibcode:2025RNAAS...9..139C. doi:10.3847/2515-5172/ade25d.
- ^ a b c d e f g h i Sgro, Lauren A.; Dalba, Paul A.; et al. (July 2024). "Confirmation and Characterization of the Eccentric, Warm Jupiter TIC 393818343 b with a Network of Citizen Scientists". The Astronomical Journal. 168 (1): 26. arXiv:2405.15021. Bibcode:2024AJ....168...26S. doi:10.3847/1538-3881/ad5096.
- ^ a b c d Hardegree-Ullman, Kevin K.; Apai, Dániel; Bergsten, Galen J.; Pascucci, Ilaria; López-Morales, Mercedes (2023). "Bioverse: A Comprehensive Assessment of the Capabilities of Extremely Large Telescopes to Probe Earth-like O2 Levels in Nearby Transiting Habitable-zone Exoplanets". The Astronomical Journal. 165 (6): 267. arXiv:2304.12490. Bibcode:2023AJ....165..267H. doi:10.3847/1538-3881/acd1ec.