TOI-1732 b
Astrophysical Synthesis & Habitability Characterization
TOI-1732 b is a confirmed sub-neptune exoplanet orbiting the star TOI-1732, located approximately 243.8 light-years (74.76 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 0.1307% across the stellar disk), this world measures 2.495 Earth radii and has a measured mass of 6.78 Earth masses. Combining its mass and radius yields a mean bulk density of 2.41 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.09 g⊕ (10.69 m/s²), and an escape velocity of 18.4 km/s.
In its orbital architecture around TOI-1732, TOI-1732 b completes one full revolution every 4.119 Earth days.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 658 K (+385°C / +725°F) and receiving 44.25 S⊕ (~60,219 W/m²), TOI-1732 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-1732 is classified as a stellar host with an effective photospheric temperature of 4,202 K, a radius of 0.6326 R☉, a mass of 0.6139 M☉, an estimated bolometric luminosity of 0.112 L☉. From Earth, TOI-1732 shines at apparent V-band magnitude 12.889 (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-1732 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 4,202 K |
| Stellar Radius | 0.6326 R☉ |
| Stellar Mass | 0.6139 M☉ |
| Bolometric Luminosity | 0.112 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | V: 12.889 · G: 12.281 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 4.119 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 88.2290° |
| Mean Bulk Density | 2.41 g/cm³ (18.4 km/s vesc) |
| Insolation Flux | 44.2458 S⊕ (~60,219 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 243.800 LY (74.760 pc) |