TOI-4724 b
Astrophysical Synthesis & Habitability Characterization
TOI-4724 b is a confirmed sub-neptune exoplanet orbiting the star TOI-4724, located approximately 734.6 light-years (225.23 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 0.1009% across the stellar disk), this world measures 3.2 Earth radii (0.29 Jupiter radii) and has a measured mass of 10.3 Earth masses. Combining its mass and radius yields a mean bulk density of 1.73 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 1.01 g⊕ (9.9 m/s²), and an escape velocity of 20.1 km/s.
In its orbital architecture around TOI-4724, TOI-4724 b completes one full revolution every 3.576 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 1314 K (+1041°C / +1906°F) and receiving 495.58 S⊕ (~674,478 W/m²), TOI-4724 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-4724 is classified as a stellar host with an effective photospheric temperature of 5,730 K, a radius of 0.9236 R☉, a mass of 1.023 M☉, an estimated bolometric luminosity of 0.825 L☉. From Earth, TOI-4724 shines at apparent V-band magnitude 11.791 (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-4724 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,730 K |
| Stellar Radius | 0.9236 R☉ |
| Stellar Mass | 1.0230 M☉ |
| Bolometric Luminosity | 0.825 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | V: 11.791 · G: 11.708 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 3.576 days |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 1.73 g/cm³ (20.1 km/s vesc) |
| Insolation Flux | 495.5750 S⊕ (~674,478 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 734.600 LY (225.229 pc) |