Kepler-1314 b

Astrophysical Synthesis & Habitability Characterization

Kepler-1314 b is a confirmed sub-neptune exoplanet orbiting the star Kepler-1314, located approximately 463.1 light-years (141.99 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.6305% across the stellar disk), this world measures 5.11 Earth radii (0.46 Jupiter radii) and has a measured mass of 22.9 Earth masses. Combining its mass and radius yields a mean bulk density of 0.95 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.88 g⊕ (8.63 m/s²), and an escape velocity of 23.7 km/s.

In its orbital architecture around Kepler-1314, Kepler-1314 b completes one full revolution every 5.425 Earth days at a semi-major axis of 0.0504 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 101.1 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 625 K (+352°C / +666°F) and receiving 36.05 S⊕ (~49,064 W/m²), Kepler-1314 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.

The host star Kepler-1314 is classified as a stellar host with an effective photospheric temperature of 4,188 K, a radius of 0.59 R☉, a mass of 0.6 M☉, an estimated bolometric luminosity of 0.096 L☉. Stellar evolution modeling indicates an estimated stellar age of 6.03 Gyr and a metallicity of [Fe/H] = -0.22 dex (metal-poor relative to the Sun). From Earth, Kepler-1314 shines at apparent V-band magnitude 17.816 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere.

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