TOI-2570 b
Astrophysical Synthesis & Habitability Characterization
TOI-2570 b is a confirmed gas giant exoplanet orbiting the star TOI-2570, located approximately 1180.2 light-years (361.86 parsecs) from the Solar System. First announced in 2022 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 1.3044% across the stellar disk), this world measures 13.641 Earth radii (1.22 Jupiter radii) and has a measured mass of 260.619 Earth masses (0.82 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.57 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 1.4 g⊕ (13.73 m/s²), and an escape velocity of 48.9 km/s.
In its orbital architecture around TOI-2570, TOI-2570 b completes one full revolution every 2.989 Earth days at a semi-major axis of 0.04145 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 150.9 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 1431 K (+1158°C / +2116°F) and receiving 699.00 S⊕ (~951,339 W/m²), TOI-2570 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-2570 is classified as a stellar host with an effective photospheric temperature of 5,771 K, a radius of 1.095 R☉, a mass of 1.063 M☉, an estimated bolometric luminosity of 1.193 L☉. Stellar evolution modeling indicates an estimated stellar age of 4.4 Gyr and a metallicity of [Fe/H] = 0.191 dex (metal-rich relative to the Sun). From Earth, TOI-2570 shines at apparent V-band magnitude 12.569 (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-2570 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,771 K |
| Stellar Radius | 1.0950 R☉ |
| Stellar Mass | 1.0630 M☉ |
| Bolometric Luminosity | 1.193 L☉ |
| Metallicity [Fe/H] | 0.191 dex |
| Stellar Age | 4.400 Gyr |
| Apparent Magnitude | V: 12.569 · G: 12.460 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.041450 AU |
| Orbital Period | 2.989 days |
| Mean Orbital Velocity | 150.9 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 87.7300° |
| Mean Bulk Density | 0.57 g/cm³ (48.9 km/s vesc) |
| Insolation Flux | 699.0000 S⊕ (~951,339 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1180.200 LY (361.857 pc) |