TOI-5786 b
Astrophysical Synthesis & Habitability Characterization
TOI-5786 b is a confirmed gas giant exoplanet orbiting the star TOI-5786, located approximately 627.8 light-years (192.48 parsecs) from the Solar System. First announced in 2025 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 0.3314% across the stellar disk), this world measures 8.54 Earth radii (0.76 Jupiter radii) and has a measured mass of 73 Earth masses (0.23 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.65 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 1 g⊕ (9.81 m/s²), and an escape velocity of 32.7 km/s.
In its orbital architecture around TOI-5786, TOI-5786 b completes one full revolution every 12.779 Earth days at a semi-major axis of 0.114 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 97.1 km/s (compared to Earth's 29.8 km/s).
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1040 K (+767°C / +1413°F) and receiving 374.46 S⊕ (~509,643 W/m²), TOI-5786 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-5786 is classified as a stellar host with an effective photospheric temperature of 6,235 K, a radius of 1.36 R☉, a mass of 1.23 M☉, an estimated bolometric luminosity of 2.508 L☉. Stellar evolution modeling indicates an estimated stellar age of 2.5 Gyr and a metallicity of [Fe/H] = 0.08 dex (metal-rich relative to the Sun). From Earth, TOI-5786 shines at apparent V-band magnitude 10.186 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere.
Methodology: Computed using the Schulze-Makuch et al. (2011) weighted metric comparing physical interior (radius, estimated density) and surface thermal regime (escape velocity, equilibrium temperature).
Discovery Facility: Transiting Exoplanet Survey Satellite (TESS) · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | TOI-5786 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 6,235 K |
| Stellar Radius | 1.3600 R☉ |
| Stellar Mass | 1.2300 M☉ |
| Bolometric Luminosity | 2.508 L☉ |
| Metallicity [Fe/H] | 0.080 dex |
| Stellar Age | 2.500 Gyr |
| Apparent Magnitude | V: 10.186 · G: 10.138 |
| System Architecture | 2 Stars, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.114000 AU |
| Orbital Period | 12.779 days |
| Mean Orbital Velocity | 97.1 km/s |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 88.9000° |
| Mean Bulk Density | 0.65 g/cm³ (32.7 km/s vesc) |
| Insolation Flux | 374.4620 S⊕ (~509,643 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 627.800 LY (192.475 pc) |