TOI-6883
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| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Delphinus[1] |
| A | |
| Right ascension | 20h 41m 10.067s[2] |
| Declination | +03° 38′ 19.25″[2] |
| Apparent magnitude (V) | 9.48[3] |
| B | |
| Right ascension | 20h 41m 10.300s[4] |
| Declination | +03° 38′ 24.88″[4] |
| Characteristics | |
| Evolutionary stage | Main sequence |
| Spectral type | G |
| Astrometry | |
| A | |
| Proper motion (μ) | RA: -56.677 mas/yr[2] Dec.: -89.096 mas/yr[2] |
| Parallax (π) | 10.6121±0.0154 mas[2] |
| Distance | 307.3 ± 0.4 ly (94.2 ± 0.1 pc) |
| B | |
| Proper motion (μ) | RA: -53.136 mas/yr[4] Dec.: -101.579 mas/yr[4] |
| Parallax (π) | 11.8192 ± 0.1557 mas[4] |
| Distance | 276 ± 4 ly (85 ± 1 pc) |
| Details[5] | |
| A | |
| Mass | 1.082+0.055 −0.056 M☉ |
| Radius | 1.086±0.020 R☉ |
| Luminosity | 1.168+0.065 −0.063 L☉ |
| Surface gravity (log g) | 4.402+0.013 −0.018 cgs |
| Temperature | 5756+67 −66 K |
| Metallicity [Fe/H] | 0.318±0.058 dex |
| Age | 3.8+2.6 −2.1 Gyr |
| Other designations | |
| BD+03 4397, TOI-6883 | |
| A: TIC 393818343 | |
| B: TIC 393818340[6] | |
| Database references | |
| SIMBAD | A |
| B | |
| Exoplanet Archive | data |
TOI-6883 is a wide visual binary system located in the constellation of Delphinus, at a distance of approximately 94 parsecs (307 light-years) from Earth. It is composed of two solar-like stars, TOI-6883A and TOI-6883B, separated by approximately 6.5 arcseconds, corresponding to ~616 astronomical units (AU).
Characteristics
[edit]Both stars are classified as G-type main-sequence stars with masses and radii similar to the Sun. According to Conzo et al. 2025,[6] data from the Gaia mission (DR3) show:
- Nearly identical parallaxes (~10.6 mas)
- Consistent proper motions
- A projected separation indicating an orbital period of ~15,300 years
These properties strongly support that the two stars form a gravitationally bound and dynamically stable binary system.[6]
However, the Gaia DR3 parallaxes and proper motions shown in VizieR differ from those reported by Conzo et al., and suggest the two stars are at different distances.[4]
Planet TOI-6883Ab
[edit]TOI-6883Ab is a warm 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.
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.
| 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 |
Naming
[edit]Following the confirmation of the binary nature of the host star, the planet’s designation was updated from TOI-6883b to TOI-6883Ab in accordance with IAU naming conventions for multiple stellar systems.[6]
References
[edit]- ^ 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 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 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.
- ^ a b 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 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. doi:10.3847/2515-5172/ade25d.
