TOI-2267 b
Astrophysical Synthesis & Habitability Characterization
TOI-2267 b is a confirmed terrestrial exoplanet orbiting the star TOI-2267 A, located approximately 73.5 light-years (22.55 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 0.1952% across the stellar disk), this world measures 1 Earth radii and has a measured mass of 0.972 Earth masses. Combining its mass and radius yields a mean bulk density of 5.36 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 0.97 g⊕ (9.51 m/s²), and an escape velocity of 11 km/s.
In its orbital architecture around TOI-2267 A, TOI-2267 b completes one full revolution every 2.289 Earth days at a semi-major axis of 0.0205 AU (an ultra-close orbit less than one-seventh of Mercury's 0.387 AU distance from the Sun, where strong stellar tidal forces typically induce synchronous rotation). Its mean orbital velocity is approximately 97.4 km/s (compared to Earth's 29.8 km/s).
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 424 K (+151°C / +304°F) and receiving 8.40 S⊕ (~11,432 W/m²), TOI-2267 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-2267 A is classified as a low-mass red dwarf of spectral type M5 V with an effective photospheric temperature of 3,030 K, a radius of 0.2075 R☉, a mass of 0.171 M☉, an estimated bolometric luminosity of 0.00326 L☉. Stellar evolution modeling indicates an estimated stellar age of 1 Gyr and a metallicity of [Fe/H] = 0.164 dex (metal-rich relative to the Sun). From Earth, TOI-2267 A shines at apparent V-band magnitude 15.56 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere. The TOI-2267 A system is a multi-planet architecture hosting 2 confirmed worlds, with TOI-2267 b sharing its stellar neighborhood alongside TOI-2267 c.
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-2267 A |
| Spectral Type | M5 V |
| Effective Temp (Teff) | 3,030 K |
| Stellar Radius | 0.2075 R☉ |
| Stellar Mass | 0.1710 M☉ |
| Bolometric Luminosity | 0.00326 L☉ |
| Metallicity [Fe/H] | 0.164 dex |
| Stellar Age | 1.000 Gyr |
| Apparent Magnitude | V: 15.560 · G: 13.762 |
| System Architecture | 2 Stars, 3 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.020500 AU |
| Orbital Period | 2.289 days |
| Mean Orbital Velocity | 97.4 km/s |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 90.3500° |
| Mean Bulk Density | 5.36 g/cm³ (11 km/s vesc) |
| Insolation Flux | 8.4000 S⊕ (~11,432 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 73.500 LY (22.550 pc) |