TOI-6884 b
Astrophysical Synthesis & Habitability Characterization
TOI-6884 b is a confirmed gas giant exoplanet orbiting the star TOI-6884, located approximately 1834.2 light-years (562.38 parsecs) from the Solar System. First announced in 2026 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 0.2681% across the stellar disk), this world measures 10.391 Earth radii (0.93 Jupiter radii) and has a measured mass of 8365.244 Earth masses (26.32 Jupiter masses). Combining its mass and radius yields a mean bulk density of 41.11 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 77.48 g⊕ (759.82 m/s²), and an escape velocity of 317.4 km/s.
In its orbital architecture around TOI-6884, TOI-6884 b completes one full revolution every 4.808 Earth days at a semi-major axis of 0.0629 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 142.3 km/s (compared to Earth's 29.8 km/s). Its moderate orbital eccentricity of e = 0.067 carries the world between 0.0587 AU at periapsis and 0.0671 AU at apoapsis, driving measurable seasonal insolation cycles.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1652 K (+1379°C / +2514°F) and receiving 1,230.00 S⊕ (~1,674,030 W/m²), TOI-6884 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-6884 is classified as a stellar host with an effective photospheric temperature of 6,330 K, a radius of 1.84 R☉, a mass of 1.41 M☉, an estimated bolometric luminosity of 4.877 L☉. Stellar evolution modeling indicates an estimated stellar age of 2.61 Gyr and a metallicity of [Fe/H] = 0.094 dex (metal-rich relative to the Sun). From Earth, TOI-6884 shines at apparent V-band magnitude 11.985 (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-6884 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 6,330 K |
| Stellar Radius | 1.8400 R☉ |
| Stellar Mass | 1.4100 M☉ |
| Bolometric Luminosity | 4.877 L☉ |
| Metallicity [Fe/H] | 0.094 dex |
| Stellar Age | 2.610 Gyr |
| Apparent Magnitude | V: 11.985 · G: 11.848 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.062900 AU |
| Orbital Period | 4.808 days |
| Mean Orbital Velocity | 142.3 km/s |
| Orbital Eccentricity (e) | 0.06700 |
| Orbital Inclination (i) | 82.4600° |
| Mean Bulk Density | 41.11 g/cm³ (317.4 km/s vesc) |
| Insolation Flux | 1230.0000 S⊕ (~1,674,030 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1834.200 LY (562.376 pc) |