Kepler-1693 b
Astrophysical Synthesis & Habitability Characterization
Kepler-1693 b is a confirmed super-earth exoplanet orbiting the star Kepler-1693, located approximately 2479 light-years (760.07 parsecs) from the Solar System. First announced in 2020 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0181% across the stellar disk), this world measures 1.289 Earth radii and has a measured mass of 2.21 Earth masses. Combining its mass and radius yields a mean bulk density of 5.69 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.33 g⊕ (13.04 m/s²), and an escape velocity of 14.6 km/s.
In its orbital architecture around Kepler-1693, Kepler-1693 b completes one full revolution every 12.1 Earth days at a semi-major axis of 0.1011 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 90.9 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 807 K (+534°C / +993°F) and receiving 100.37 S⊕ (~136,604 W/m²), Kepler-1693 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-1693 is classified as a stellar host with an effective photospheric temperature of 5,432 K, a radius of 0.8783 R☉, a mass of 0.95 M☉, an estimated bolometric luminosity of 0.603 L☉. Stellar evolution modeling indicates an estimated stellar age of 0.8 Gyr and a metallicity of [Fe/H] = 0.026 dex (near-solar heavy-element abundance). From Earth, Kepler-1693 shines at apparent V-band magnitude 14.857 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere. The Kepler-1693 system is a multi-planet architecture hosting 2 confirmed worlds, with Kepler-1693 b sharing its stellar neighborhood alongside Kepler-1693 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: Kepler · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | Kepler-1693 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,432 K |
| Stellar Radius | 0.8783 R☉ |
| Stellar Mass | 0.9500 M☉ |
| Bolometric Luminosity | 0.603 L☉ |
| Metallicity [Fe/H] | 0.026 dex |
| Stellar Age | 0.800 Gyr |
| Apparent Magnitude | V: 14.857 · G: 14.744 |
| System Architecture | 1 Star, 2 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.101100 AU |
| Orbital Period | 12.1 days |
| Mean Orbital Velocity | 90.9 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 89.6900° |
| Mean Bulk Density | 5.69 g/cm³ (14.6 km/s vesc) |
| Insolation Flux | 100.3700 S⊕ (~136,604 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 2479.000 LY (760.065 pc) |