TOI-1693 b
Astrophysical Synthesis & Habitability Characterization
TOI-1693 b is a confirmed super-earth exoplanet orbiting the star TOI-1693, located approximately 100.4 light-years (30.8 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 0.079% across the stellar disk), this world measures 1.41 Earth radii and has a measured mass of 2.57 Earth masses. Combining its mass and radius yields a mean bulk density of 5.06 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.29 g⊕ (12.65 m/s²), and an escape velocity of 15.1 km/s.
In its orbital architecture around TOI-1693, TOI-1693 b completes one full revolution every 1.767 Earth days at a semi-major axis of 0.0226 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 139.2 km/s (compared to Earth's 29.8 km/s).
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 764 K (+491°C / +916°F) and receiving 57.02 S⊕ (~77,605 W/m²), TOI-1693 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-1693 is classified as a stellar host with an effective photospheric temperature of 3,499 K, a radius of 0.46 R☉, a mass of 0.49 M☉, an estimated bolometric luminosity of 0.028 L☉. From Earth, TOI-1693 shines at apparent V-band magnitude 12.962 (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-1693 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 3,499 K |
| Stellar Radius | 0.4600 R☉ |
| Stellar Mass | 0.4900 M☉ |
| Bolometric Luminosity | 0.028 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | V: 12.962 · G: 11.837 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.022600 AU |
| Orbital Period | 1.767 days |
| Mean Orbital Velocity | 139.2 km/s |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 5.06 g/cm³ (15.1 km/s vesc) |
| Insolation Flux | 57.0208 S⊕ (~77,605 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 100.400 LY (30.795 pc) |