TOI-2152 A b
Astrophysical Synthesis & Habitability Characterization
TOI-2152 A b is a confirmed gas giant exoplanet orbiting the star TOI-2152, located approximately 988.3 light-years (303.01 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 0.6669% across the stellar disk), this world measures 14.359 Earth radii (1.28 Jupiter radii) and has a measured mass of 899.454 Earth masses (2.83 Jupiter masses). Combining its mass and radius yields a mean bulk density of 1.68 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 4.36 g⊕ (42.76 m/s²), and an escape velocity of 88.5 km/s.
In its orbital architecture around TOI-2152, TOI-2152 A b completes one full revolution every 3.377 Earth days at a semi-major axis of 0.05064 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 163.1 km/s (compared to Earth's 29.8 km/s). Its moderate orbital eccentricity of e = 0.057 carries the world between 0.0478 AU at periapsis and 0.0535 AU at apoapsis, driving measurable seasonal insolation cycles.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1802 K (+1529°C / +2784°F) and receiving 2,195.72 S⊕ (~2,988,382 W/m²), TOI-2152 A b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-2152 is classified as a warm F-type star of spectral type F4 V with an effective photospheric temperature of 6,630 K, a radius of 1.612 R☉, a mass of 1.516 M☉, an estimated bolometric luminosity of 4.505 L☉. Stellar evolution modeling indicates an estimated stellar age of 0.83 Gyr and a metallicity of [Fe/H] = 0.282 dex (metal-rich relative to the Sun). From Earth, TOI-2152 shines at apparent V-band magnitude 11.436 (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-2152 |
| Spectral Type | F4 V |
| Effective Temp (Teff) | 6,630 K |
| Stellar Radius | 1.6120 R☉ |
| Stellar Mass | 1.5160 M☉ |
| Bolometric Luminosity | 4.505 L☉ |
| Metallicity [Fe/H] | 0.282 dex |
| Stellar Age | 0.830 Gyr |
| Apparent Magnitude | V: 11.436 · G: 11.241 |
| System Architecture | 3 Stars, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.050640 AU |
| Orbital Period | 3.377 days |
| Mean Orbital Velocity | 163.1 km/s |
| Orbital Eccentricity (e) | 0.05700 |
| Orbital Inclination (i) | 86.4200° |
| Mean Bulk Density | 1.68 g/cm³ (88.5 km/s vesc) |
| Insolation Flux | 2195.7249 S⊕ (~2,988,382 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 988.300 LY (303.006 pc) |