Kepler-1434 b

Astrophysical Synthesis & Habitability Characterization

Kepler-1434 b is a confirmed terrestrial exoplanet orbiting the star Kepler-1434, located approximately 2529.4 light-years (775.53 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 1.11 Earth radii and has a measured mass of 1.41 Earth masses. Combining its mass and radius yields a mean bulk density of 5.68 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.14 g⊕ (11.18 m/s²), and an escape velocity of 12.6 km/s.

In its orbital architecture around Kepler-1434, Kepler-1434 b completes one full revolution every 8.053 Earth days at a semi-major axis of 0.0917 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 123.9 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 1320 K (+1047°C / +1917°F) and receiving 925.29 S⊕ (~1,259,318 W/m²), Kepler-1434 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.

The host star Kepler-1434 is classified as a stellar host with an effective photospheric temperature of 6,291 K, a radius of 2.04 R☉, a mass of 1.47 M☉, an estimated bolometric luminosity of 5.848 L☉. Stellar evolution modeling indicates an estimated stellar age of 2.57 Gyr and a metallicity of [Fe/H] = 0.19 dex (metal-rich relative to the Sun). From Earth, Kepler-1434 shines at apparent V-band magnitude 12.198 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere.

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