TOI-6883
Location of TOI-6883AB (circled) | |
| 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 star system located in the constellation of Delphinus, at a distance of approximately 94 parsecs (307 light-years) from Earth. It is composed of two Sun-like stars, TOI-6883A and TOI-6883B, separated by approximately 6.5 arcseconds, corresponding to ~616 astronomical units (AU).
Characteristics
[edit | edit source]Both stars are classified as G-type main-sequence stars with masses and radii similar to that of 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 the idea 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 may suggest the two stars are at different distances.[4]
Planetary system
[edit | edit source]The TOI-6883 system appears to have 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. 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]
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
[edit | edit source]- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). Constellation record for this object at VizieR.
- ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). Gaia DR3 record for this source at VizieR.
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b c d e Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). Gaia DR3 record for this source at VizieR.
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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