TOI-512 b
Astrophysical Synthesis & Habitability Characterization
TOI-512 b is a confirmed super-earth exoplanet orbiting the star TOI-512, located approximately 219.8 light-years (67.4 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 0.0252% across the stellar disk), this world measures 1.54 Earth radii and has a measured mass of 3.57 Earth masses. Combining its mass and radius yields a mean bulk density of 5.39 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.51 g⊕ (14.81 m/s²), and an escape velocity of 17 km/s.
In its orbital architecture around TOI-512, TOI-512 b completes one full revolution every 7.189 Earth days. With a near-circular eccentricity of e = 0.02, the planet experiences minimal orbital distance variation.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1009 K (+736°C / +1357°F) and receiving 127.00 S⊕ (~172,847 W/m²), TOI-512 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-512 is classified as a stellar host with an effective photospheric temperature of 5,277 K, a radius of 0.89 R☉, a mass of 0.74 M☉, an estimated bolometric luminosity of 0.551 L☉. Stellar evolution modeling indicates an estimated stellar age of 8.235 Gyr and a metallicity of [Fe/H] = -0.11 dex (metal-poor relative to the Sun). From Earth, TOI-512 shines at apparent V-band magnitude 9.735 (accessible to binoculars and small amateur telescopes) 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-512 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,277 K |
| Stellar Radius | 0.8900 R☉ |
| Stellar Mass | 0.7400 M☉ |
| Bolometric Luminosity | 0.551 L☉ |
| Metallicity [Fe/H] | -0.110 dex |
| Stellar Age | 8.235 Gyr |
| Apparent Magnitude | V: 9.735 · G: 9.480 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 7.189 days |
| Orbital Eccentricity (e) | 0.02000 |
| Orbital Inclination (i) | 88.9200° |
| Mean Bulk Density | 5.39 g/cm³ (17 km/s vesc) |
| Insolation Flux | 127.0000 S⊕ (~172,847 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 219.800 LY (67.398 pc) |