TOI-5882 b
Astrophysical Synthesis & Habitability Characterization
TOI-5882 b is a confirmed gas giant exoplanet orbiting the star TOI-5882, located approximately 1357.1 light-years (416.1 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 0.2164% across the stellar disk), this world measures 11.467 Earth radii (1.02 Jupiter radii) and has a measured mass of 6995.403 Earth masses (22.01 Jupiter masses). Combining its mass and radius yields a mean bulk density of 25.58 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 53.2 g⊕ (521.71 m/s²), and an escape velocity of 276.3 km/s.
In its orbital architecture around TOI-5882, TOI-5882 b completes one full revolution every 7.149 Earth days at a semi-major axis of 0.0804 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 122.4 km/s (compared to Earth's 29.8 km/s). With a near-circular eccentricity of e = 0.0339 (ranging from 0.0777 AU at periapsis to 0.0831 AU at apoapsis), the planet experiences minimal orbital distance variation.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1515 K (+1242°C / +2268°F) and receiving 4,792.50 S⊕ (~6,522,593 W/m²), TOI-5882 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-5882 is classified as a stellar host with an effective photospheric temperature of 5,920 K, a radius of 2.26 R☉, a mass of 1.334 M☉, an estimated bolometric luminosity of 5.629 L☉. Stellar evolution modeling indicates an estimated stellar age of 4.11 Gyr and a metallicity of [Fe/H] = 0.18 dex (metal-rich relative to the Sun). From Earth, TOI-5882 shines at apparent V-band magnitude 11.315 (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-5882 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,920 K |
| Stellar Radius | 2.2600 R☉ |
| Stellar Mass | 1.3340 M☉ |
| Bolometric Luminosity | 5.629 L☉ |
| Metallicity [Fe/H] | 0.180 dex |
| Stellar Age | 4.110 Gyr |
| Apparent Magnitude | V: 11.315 · G: 11.106 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.080400 AU |
| Orbital Period | 7.149 days |
| Mean Orbital Velocity | 122.4 km/s |
| Orbital Eccentricity (e) | 0.03390 |
| Orbital Inclination (i) | 88.5600° |
| Mean Bulk Density | 25.58 g/cm³ (276.3 km/s vesc) |
| Insolation Flux | 4792.5000 S⊕ (~6,522,593 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1357.100 LY (416.104 pc) |