TOI-4529 b
Astrophysical Synthesis & Habitability Characterization
TOI-4529 b is a confirmed super-earth exoplanet orbiting the star TOI-4529, located approximately 92.6 light-years (28.38 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 0.1143% across the stellar disk), this world measures 1.77 Earth radii and has a measured mass of 4.9 Earth masses. Combining its mass and radius yields a mean bulk density of 4.87 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.56 g⊕ (15.3 m/s²), and an escape velocity of 18.6 km/s.
In its orbital architecture around TOI-4529, TOI-4529 b completes one full revolution every 5.88 Earth days.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 511 K (+238°C / +460°F) and receiving 14.61 S⊕ (~19,883 W/m²), TOI-4529 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-4529 is classified as a low-mass red dwarf of spectral type M1.5 V with an effective photospheric temperature of 3,697 K, a radius of 0.48 R☉, a mass of 0.482 M☉, an estimated bolometric luminosity of 0.039 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = -0.24 dex (metal-poor relative to the Sun). From Earth, TOI-4529 shines at apparent V-band magnitude 12.214 (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-4529 |
| Spectral Type | M1.5 V |
| Effective Temp (Teff) | 3,697 K |
| Stellar Radius | 0.4800 R☉ |
| Stellar Mass | 0.4820 M☉ |
| Bolometric Luminosity | 0.039 L☉ |
| Metallicity [Fe/H] | -0.240 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 12.214 · G: 11.216 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 5.88 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 88.7000° |
| Mean Bulk Density | 4.87 g/cm³ (18.6 km/s vesc) |
| Insolation Flux | 14.6089 S⊕ (~19,883 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 92.600 LY (28.384 pc) |