TOI-2485 b
Astrophysical Synthesis & Habitability Characterization
TOI-2485 b is a confirmed gas giant exoplanet orbiting the star TOI-2485, located approximately 1297.9 light-years (397.95 parsecs) from the Solar System. First announced in 2024 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 0.4186% across the stellar disk), this world measures 12.139 Earth radii (1.08 Jupiter radii) and has a measured mass of 766.602 Earth masses (2.41 Jupiter masses). Combining its mass and radius yields a mean bulk density of 2.36 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 5.2 g⊕ (50.99 m/s²), and an escape velocity of 88.9 km/s.
In its orbital architecture around TOI-2485, TOI-2485 b completes one full revolution every 11.235 Earth days at a semi-major axis of 0.1093 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 105.8 km/s (compared to Earth's 29.8 km/s). With a near-circular eccentricity of e = 0.0341 (ranging from 0.1056 AU at periapsis to 0.113 AU at apoapsis), the planet experiences minimal orbital distance variation.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1134 K (+861°C / +1582°F) and receiving 275.60 S⊕ (~375,092 W/m²), TOI-2485 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-2485 is classified as a stellar host with an effective photospheric temperature of 6,016 K, a radius of 1.72 R☉, a mass of 1.163 M☉, an estimated bolometric luminosity of 3.477 L☉. Stellar evolution modeling indicates an estimated stellar age of 6 Gyr and a metallicity of [Fe/H] = 0.097 dex (metal-rich relative to the Sun). From Earth, TOI-2485 shines at apparent V-band magnitude 11.935 (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-2485 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 6,016 K |
| Stellar Radius | 1.7200 R☉ |
| Stellar Mass | 1.1630 M☉ |
| Bolometric Luminosity | 3.477 L☉ |
| Metallicity [Fe/H] | 0.097 dex |
| Stellar Age | 6.000 Gyr |
| Apparent Magnitude | V: 11.935 · G: 11.373 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.109300 AU |
| Orbital Period | 11.235 days |
| Mean Orbital Velocity | 105.8 km/s |
| Orbital Eccentricity (e) | 0.03410 |
| Orbital Inclination (i) | 89.4900° |
| Mean Bulk Density | 2.36 g/cm³ (88.9 km/s vesc) |
| Insolation Flux | 275.6000 S⊕ (~375,092 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1297.900 LY (397.953 pc) |