TOI-1411 b
Astrophysical Synthesis & Habitability Characterization
TOI-1411 b is a confirmed terrestrial exoplanet orbiting the star TOI-1411, located approximately 105.9 light-years (32.48 parsecs) from the Solar System. First announced in 2022 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 0.0321% across the stellar disk), this world measures 1.199 Earth radii and has a measured mass of 2 Earth masses. Combining its mass and radius yields a mean bulk density of 6.4 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.39 g⊕ (13.63 m/s²), and an escape velocity of 14.4 km/s.
In its orbital architecture around TOI-1411, TOI-1411 b completes one full revolution every 1.452 Earth days at a semi-major axis of 0.02122 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 159 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 976 K (+703°C / +1297°F) and receiving 266.85 S⊕ (~363,183 W/m²), TOI-1411 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-1411 is classified as a stellar host with an effective photospheric temperature of 4,115 K, a radius of 0.614 R☉, a mass of 0.6045 M☉, an estimated bolometric luminosity of 0.097 L☉. Stellar evolution modeling indicates an estimated stellar age of 9.6 Gyr and a metallicity of [Fe/H] = 0.012 dex (near-solar heavy-element abundance). From Earth, TOI-1411 shines at apparent V-band magnitude 10.51 (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-1411 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 4,115 K |
| Stellar Radius | 0.6140 R☉ |
| Stellar Mass | 0.6045 M☉ |
| Bolometric Luminosity | 0.097 L☉ |
| Metallicity [Fe/H] | 0.012 dex |
| Stellar Age | 9.600 Gyr |
| Apparent Magnitude | V: 10.510 · G: 9.877 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.021220 AU |
| Orbital Period | 1.452 days |
| Mean Orbital Velocity | 159 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 6.4 g/cm³ (14.4 km/s vesc) |
| Insolation Flux | 266.8500 S⊕ (~363,183 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 105.900 LY (32.478 pc) |