TOI-6324 b
Astrophysical Synthesis & Habitability Characterization
TOI-6324 b is a confirmed terrestrial exoplanet orbiting the star TOI-6324, located approximately 67 light-years (20.55 parsecs) from the Solar System. First announced in 2025 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 0.1098% across the stellar disk), this world measures 1.059 Earth radii and has a measured mass of 1.17 Earth masses. Combining its mass and radius yields a mean bulk density of 5.43 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.04 g⊕ (10.2 m/s²), and an escape velocity of 11.8 km/s.
In its orbital architecture around TOI-6324, TOI-6324 b completes one full revolution every 0.279 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 1216 K (+943°C / +1729°F) and receiving 284.21 S⊕ (~386,811 W/m²), TOI-6324 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-6324 is classified as a stellar host with an effective photospheric temperature of 3,247 K, a radius of 0.293 R☉, a mass of 0.269 M☉, an estimated bolometric luminosity of 0.00856 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = -0.32 dex (metal-poor relative to the Sun). From Earth, TOI-6324 shines at apparent V-band magnitude 13.386 (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-6324 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 3,247 K |
| Stellar Radius | 0.2930 R☉ |
| Stellar Mass | 0.2690 M☉ |
| Bolometric Luminosity | 0.00856 L☉ |
| Metallicity [Fe/H] | -0.320 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 13.386 · G: 12.214 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 0.279 days |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 74.6000° |
| Mean Bulk Density | 5.43 g/cm³ (11.8 km/s vesc) |
| Insolation Flux | 284.2110 S⊕ (~386,811 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 67.000 LY (20.549 pc) |