TOI-1444 b
Astrophysical Synthesis & Habitability Characterization
TOI-1444 b is a confirmed super-earth exoplanet orbiting the star TOI-1444, located approximately 409.2 light-years (125.46 parsecs) from the Solar System. First announced in 2021 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 0.0204% across the stellar disk), this world measures 1.418 Earth radii and has a measured mass of 3.58 Earth masses. Combining its mass and radius yields a mean bulk density of 6.92 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 1.78 g⊕ (17.46 m/s²), and an escape velocity of 17.8 km/s.
In its orbital architecture around TOI-1444, TOI-1444 b completes one full revolution every 0.47 Earth days at a semi-major axis of 0.0116 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 268.3 km/s (compared to Earth's 29.8 km/s). 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 2130 K (+1857°C / +3375°F) and receiving 5,028.63 S⊕ (~6,843,960 W/m²), TOI-1444 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-1444 is classified as a solar-type yellow star of spectral type G with an effective photospheric temperature of 5,460 K, a radius of 0.9105 R☉, a mass of 0.9513 M☉, an estimated bolometric luminosity of 0.661 L☉. Stellar evolution modeling indicates an estimated stellar age of 3.8 Gyr and a metallicity of [Fe/H] = 0.146 dex (metal-rich relative to the Sun). From Earth, TOI-1444 shines at apparent V-band magnitude 10.936 (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-1444 |
| Spectral Type | G |
| Effective Temp (Teff) | 5,460 K |
| Stellar Radius | 0.9105 R☉ |
| Stellar Mass | 0.9513 M☉ |
| Bolometric Luminosity | 0.661 L☉ |
| Metallicity [Fe/H] | 0.146 dex |
| Stellar Age | 3.800 Gyr |
| Apparent Magnitude | V: 10.936 · G: 10.642 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.011600 AU |
| Orbital Period | 0.47 days |
| Mean Orbital Velocity | 268.3 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 82.0000° |
| Mean Bulk Density | 6.92 g/cm³ (17.8 km/s vesc) |
| Insolation Flux | 5028.6263 S⊕ (~6,843,960 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 409.200 LY (125.463 pc) |