TOI-713 b
Astrophysical Synthesis & Habitability Characterization
TOI-713 b is a confirmed terrestrial exoplanet orbiting the star TOI-713, located approximately 226.2 light-years (69.37 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 0.0271% across the stellar disk), this world measures 1.169 Earth radii and has a measured mass of 1.754 Earth masses. Combining its mass and radius yields a mean bulk density of 6.05 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.28 g⊕ (12.55 m/s²), and an escape velocity of 13.7 km/s.
In its orbital architecture around TOI-713, TOI-713 b completes one full revolution every 1.872 Earth days. 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 953 K (+680°C / +1256°F) and receiving 202.00 S⊕ (~274,922 W/m²), TOI-713 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-713 is classified as a stellar host with an effective photospheric temperature of 4,317 K, a radius of 0.6511 R☉, a mass of 0.67 M☉, an estimated bolometric luminosity of 0.132 L☉. From Earth, TOI-713 shines at apparent V-band magnitude 11.863 (faint and requiring research-grade or CCD telescopic photometry) in the Southern celestial hemisphere. The TOI-713 system is a multi-planet architecture hosting 2 confirmed worlds, with TOI-713 b sharing its stellar neighborhood alongside TOI-713 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 | TOI-713 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 4,317 K |
| Stellar Radius | 0.6511 R☉ |
| Stellar Mass | 0.6700 M☉ |
| Bolometric Luminosity | 0.132 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | V: 11.863 · G: 11.438 |
| System Architecture | 1 Star, 2 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 1.872 days |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 6.05 g/cm³ (13.7 km/s vesc) |
| Insolation Flux | 202.0000 S⊕ (~274,922 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 226.200 LY (69.365 pc) |