TOI-6883
 Artist's impressions of TOI-6883 system | |
| Observation data Epoch J2000.0 Equinox ICRS | |
|---|---|
| Constellation | Delphinus |
| A | |
| Right ascension | 20h 41m 10.067s |
| Declination | +03° 38′ 19.25″ |
| Apparent magnitude (V) | 9.48 |
| B | |
| Right ascension | 20h 41m 10.300s |
| Declination | +03° 38′ 24.88″ |
| Apparent magnitude (V) | 11.20 |
| Characteristics | |
| A | |
| Evolutionary stage | Main sequence |
| Spectral type | G |
| B | |
| Evolutionary stage | Main sequence |
| Spectral type | G |
| Astrometry | |
| A | |
| Proper motion (μ) | RA: −56.677 mas/yr Dec.: −89.096 mas/yr |
| Parallax (π) | 10.6121±0.0154 mas |
| Distance | 307.3 ± 0.4 ly (94.2 ± 0.1 pc) |
| B | |
| Proper motion (μ) | RA: −53.136 mas/yr Dec.: −101.579 mas/yr |
| Parallax (π) | 11.8192±0.1557 mas |
| Distance | 276 ± 4 ly (85 ± 1 pc) |
| Details | |
| 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 |
| B | |
| Mass | 0.702 M☉ |
| Radius | 0.701 R☉ |
| Luminosity | 0.246 L☉ |
| Surface gravity (log g) | 4.60 cgs |
| Temperature | 4,892 K |
| Other designations | |
| BD+03 4397, TOI-6883 | |
| A: TIC 393818343 | |
| B: TIC 393818340 | |
| Database references | |
| SIMBAD | A |
| B | |
| Exoplanet Archive | data |
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.
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.
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 published in Research Notes of the AAS (which is not peer-reviewed) claims a different parallax for star B, attributed to Gaia DR3, that is similar to that of star A (~10.6 mas).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.
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. 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.
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 |
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.
- 1 2 3 4 5 6 7 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.
- 1 2 3 4 5 6 7 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.
- 1 2 3 4 5 6 7 8 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.
- 1 2 3 4 5 6 7 8 9 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.
- 1 2 3 4 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.
