TOI-5532 b
Astrophysical Synthesis & Habitability Characterization
TOI-5532 b is a confirmed sub-neptune exoplanet orbiting the star TOI-5532, located approximately 296.8 light-years (91 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 0.1225% across the stellar disk), this world measures 2.528 Earth radii and has a measured mass of 6.93 Earth masses. Combining its mass and radius yields a mean bulk density of 2.37 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.08 g⊕ (10.59 m/s²), and an escape velocity of 18.5 km/s.
In its orbital architecture around TOI-5532, TOI-5532 b completes one full revolution every 5.654 Earth days.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 617 K (+344°C / +651°F) and receiving 34.32 S⊕ (~46,713 W/m²), TOI-5532 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-5532 is classified as a stellar host with an effective photospheric temperature of 4,208 K, a radius of 0.6621 R☉, a mass of 0.6361 M☉, an estimated bolometric luminosity of 0.123 L☉. From Earth, TOI-5532 shines at apparent V-band magnitude 13.072 (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-5532 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 4,208 K |
| Stellar Radius | 0.6621 R☉ |
| Stellar Mass | 0.6361 M☉ |
| Bolometric Luminosity | 0.123 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | V: 13.072 · G: 12.435 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 5.654 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 85.1576° |
| Mean Bulk Density | 2.37 g/cm³ (18.5 km/s vesc) |
| Insolation Flux | 34.3229 S⊕ (~46,713 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 296.800 LY (90.999 pc) |