Kepler-1394 b

Astrophysical Synthesis & Habitability Characterization

Kepler-1394 b is a confirmed super-earth exoplanet orbiting the star Kepler-1394, located approximately 2088.7 light-years (640.41 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0025% across the stellar disk), this world measures 1.39 Earth radii and has a measured mass of 2.51 Earth masses. Combining its mass and radius yields a mean bulk density of 5.15 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.3 g⊕ (12.75 m/s²), and an escape velocity of 15 km/s.

In its orbital architecture around Kepler-1394, Kepler-1394 b completes one full revolution every 3.938 Earth days at a semi-major axis of 0.05474 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 151.2 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 1947 K (+1674°C / +3045°F) and receiving 2,023.01 S⊕ (~2,753,310 W/m²), Kepler-1394 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.

The host star Kepler-1394 is classified as a stellar host with an effective photospheric temperature of 6,481 K, a radius of 2.55 R☉, a mass of 1.64 M☉, an estimated bolometric luminosity of 10.293 L☉. Stellar evolution modeling indicates an estimated stellar age of 1.91 Gyr and a metallicity of [Fe/H] = 0.06 dex (metal-rich relative to the Sun). From Earth, Kepler-1394 shines at apparent V-band magnitude 11.714 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere.

Discovery Facility: Kepler · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).