TOI-3053 b
Astrophysical Synthesis & Habitability Characterization
TOI-3053 b is a confirmed gas giant exoplanet orbiting the star TOI-3053, located approximately 1101.2 light-years (337.63 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 1.6433% across the stellar disk), this world measures 13.563 Earth radii (1.21 Jupiter radii) and has a measured mass of 270.154 Earth masses (0.85 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.6 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 1.47 g⊕ (14.42 m/s²), and an escape velocity of 49.9 km/s.
In its orbital architecture around TOI-3053, TOI-3053 b completes one full revolution every 2.992 Earth days at a semi-major axis of 0.039 AU (an ultra-close orbit less than one-seventh of Mercury's 0.387 AU distance from the Sun, where strong stellar tidal forces typically induce synchronous rotation). Its mean orbital velocity is approximately 141.8 km/s (compared to Earth's 29.8 km/s). The orbit is modeled as circular (e = 0.00), maintaining a constant stellar distance throughout its year.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1290 K (+1017°C / +1863°F) and receiving 460.00 S⊕ (~626,060 W/m²), TOI-3053 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-3053 is classified as a solar-type yellow star of spectral type G8-K0 V with an effective photospheric temperature of 5,378 K, a radius of 0.97 R☉, a mass of 0.96 M☉, an estimated bolometric luminosity of 0.706 L☉. Stellar evolution modeling indicates an estimated stellar age of 7.8 Gyr and a metallicity of [Fe/H] = 0.2 dex (metal-rich relative to the Sun). From Earth, TOI-3053 shines at apparent V-band magnitude 13.108 (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 | TOI-3053 |
| Spectral Type | G8-K0 V |
| Effective Temp (Teff) | 5,378 K |
| Stellar Radius | 0.9700 R☉ |
| Stellar Mass | 0.9600 M☉ |
| Bolometric Luminosity | 0.706 L☉ |
| Metallicity [Fe/H] | 0.200 dex |
| Stellar Age | 7.800 Gyr |
| Apparent Magnitude | V: 13.108 · G: 12.970 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.039000 AU |
| Orbital Period | 2.992 days |
| Mean Orbital Velocity | 141.8 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 87.3000° |
| Mean Bulk Density | 0.6 g/cm³ (49.9 km/s vesc) |
| Insolation Flux | 460.0000 S⊕ (~626,060 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1101.200 LY (337.627 pc) |