TIC 4672985 b
Astrophysical Synthesis & Habitability Characterization
TIC 4672985 b is a confirmed gas giant exoplanet orbiting the star TIC 4672985, located approximately 826.4 light-years (253.39 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 0.8405% across the stellar disk), this world measures 11.5 Earth radii (1.03 Jupiter radii) and has a measured mass of 4049.134 Earth masses (12.74 Jupiter masses). Combining its mass and radius yields a mean bulk density of 14.68 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 30.62 g⊕ (300.28 m/s²), and an escape velocity of 209.9 km/s.
In its orbital architecture around TIC 4672985, TIC 4672985 b completes one full revolution every 69.048 Earth days at a semi-major axis of 0.33 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 52 km/s (compared to Earth's 29.8 km/s). With a near-circular eccentricity of e = 0.018 (ranging from 0.3241 AU at periapsis to 0.3359 AU at apoapsis), the planet experiences minimal orbital distance variation.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 517 K (+244°C / +471°F) and receiving 11.94 S⊕ (~16,247 W/m²), TIC 4672985 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TIC 4672985 is classified as a stellar host with an effective photospheric temperature of 5,757 K, a radius of 1.15 R☉, a mass of 1.01 M☉, an estimated bolometric luminosity of 1.303 L☉. Stellar evolution modeling indicates an estimated stellar age of 7.71 Gyr and a metallicity of [Fe/H] = 0.14 dex (metal-rich relative to the Sun). From Earth, TIC 4672985 shines at apparent V-band magnitude 11.501 (faint and requiring research-grade or CCD telescopic photometry) in the Southern 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 | TIC 4672985 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,757 K |
| Stellar Radius | 1.1500 R☉ |
| Stellar Mass | 1.0100 M☉ |
| Bolometric Luminosity | 1.303 L☉ |
| Metallicity [Fe/H] | 0.140 dex |
| Stellar Age | 7.710 Gyr |
| Apparent Magnitude | V: 11.501 · G: 11.444 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.330000 AU |
| Orbital Period | 69.048 days |
| Mean Orbital Velocity | 52 km/s |
| Orbital Eccentricity (e) | 0.01800 |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 14.68 g/cm³ (209.9 km/s vesc) |
| Insolation Flux | 11.9376 S⊕ (~16,247 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 826.400 LY (253.385 pc) |