TIC 279401253 b
Astrophysical Synthesis & Habitability Characterization
TIC 279401253 b is a confirmed gas giant exoplanet orbiting the star TIC 279401253, located approximately 931.4 light-years (285.58 parsecs) from the Solar System. First announced in 2023 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 0.9399% across the stellar disk), this world measures 11.209 Earth radii (1 Jupiter radii) and has a measured mass of 1951.466 Earth masses (6.14 Jupiter masses). Combining its mass and radius yields a mean bulk density of 7.64 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 15.53 g⊕ (152.3 m/s²), and an escape velocity of 147.6 km/s.
In its orbital architecture around TIC 279401253, TIC 279401253 b completes one full revolution every 76.8 Earth days at a semi-major axis of 0.369 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 52.3 km/s (compared to Earth's 29.8 km/s). The planet follows a highly eccentric trajectory (e = 0.448, swinging from 0.2037 AU at periapsis out to 0.5343 AU at apoapsis), pointing to past dynamical scattering or secular gravitational perturbations.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 486 K (+213°C / +415°F) and receiving 9.18 S⊕ (~12,494 W/m²), TIC 279401253 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TIC 279401253 is classified as a stellar host with an effective photospheric temperature of 5,951 K, a radius of 1.06 R☉, a mass of 1.13 M☉, an estimated bolometric luminosity of 1.264 L☉. Stellar evolution modeling indicates an estimated stellar age of 1.2 Gyr and a metallicity of [Fe/H] = 0.2 dex (metal-rich relative to the Sun). From Earth, TIC 279401253 shines at apparent V-band magnitude 11.938 (faint and requiring research-grade or CCD telescopic photometry) in the Southern celestial hemisphere. The TIC 279401253 system is a multi-planet architecture hosting 2 confirmed worlds, with TIC 279401253 b sharing its stellar neighborhood alongside TIC 279401253 c.
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 279401253 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,951 K |
| Stellar Radius | 1.0600 R☉ |
| Stellar Mass | 1.1300 M☉ |
| Bolometric Luminosity | 1.264 L☉ |
| Metallicity [Fe/H] | 0.200 dex |
| Stellar Age | 1.200 Gyr |
| Apparent Magnitude | V: 11.938 · G: 11.697 |
| System Architecture | 1 Star, 2 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.369000 AU |
| Orbital Period | 76.8 days |
| Mean Orbital Velocity | 52.3 km/s |
| Orbital Eccentricity (e) | 0.44800 |
| Orbital Inclination (i) | 89.5900° |
| Mean Bulk Density | 7.64 g/cm³ (147.6 km/s vesc) |
| Insolation Flux | 9.1803 S⊕ (~12,494 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 931.400 LY (285.584 pc) |