TOI-3071 b
Astrophysical Synthesis & Habitability Characterization
TOI-3071 b is a confirmed gas giant exoplanet orbiting the star TOI-3071, located approximately 1582.6 light-years (485.22 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 0.2511% across the stellar disk), this world measures 7.16 Earth radii (0.64 Jupiter radii) and has a measured mass of 68.2 Earth masses (0.21 Jupiter masses). Combining its mass and radius yields a mean bulk density of 1.02 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 1.33 g⊕ (13.04 m/s²), and an escape velocity of 34.5 km/s.
In its orbital architecture around TOI-3071, TOI-3071 b completes one full revolution every 1.267 Earth days at a semi-major axis of 0.0249 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 213.8 km/s (compared to Earth's 29.8 km/s). Its moderate orbital eccentricity of e = 0.09 carries the world between 0.0227 AU at periapsis and 0.0271 AU at apoapsis, driving measurable seasonal insolation cycles.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 2155 K (+1882°C / +3420°F) and receiving 2,579.61 S⊕ (~3,510,849 W/m²), TOI-3071 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-3071 is classified as a stellar host with an effective photospheric temperature of 6,177 K, a radius of 1.31 R☉, a mass of 1.29 M☉, an estimated bolometric luminosity of 2.242 L☉. Stellar evolution modeling indicates an estimated stellar age of 0.95 Gyr and a metallicity of [Fe/H] = 0.35 dex (metal-rich relative to the Sun). From Earth, TOI-3071 shines at apparent V-band magnitude 12.383 (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-3071 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 6,177 K |
| Stellar Radius | 1.3100 R☉ |
| Stellar Mass | 1.2900 M☉ |
| Bolometric Luminosity | 2.242 L☉ |
| Metallicity [Fe/H] | 0.350 dex |
| Stellar Age | 0.950 Gyr |
| Apparent Magnitude | V: 12.383 · G: 12.277 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.024900 AU |
| Orbital Period | 1.267 days |
| Mean Orbital Velocity | 213.8 km/s |
| Orbital Eccentricity (e) | 0.09000 |
| Orbital Inclination (i) | 82.1000° |
| Mean Bulk Density | 1.02 g/cm³ (34.5 km/s vesc) |
| Insolation Flux | 2579.6100 S⊕ (~3,510,849 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1582.600 LY (485.219 pc) |