Kepler-1435 b

Astrophysical Synthesis & Habitability Characterization

Kepler-1435 b is a confirmed terrestrial exoplanet orbiting the star Kepler-1435, located approximately 2296.8 light-years (704.21 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0036% across the stellar disk), this world measures 0.86 Earth radii and has a measured mass of 0.566 Earth masses. Combining its mass and radius yields a mean bulk density of 4.91 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 0.77 g⊕ (7.55 m/s²), and an escape velocity of 9.1 km/s.

In its orbital architecture around Kepler-1435, Kepler-1435 b completes one full revolution every 4.453 Earth days at a semi-major axis of 0.05456 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 133.3 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 1331 K (+1058°C / +1936°F) and receiving 893.89 S⊕ (~1,216,579 W/m²), Kepler-1435 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.

The host star Kepler-1435 is classified as a stellar host with an effective photospheric temperature of 6,356 K, a radius of 1.32 R☉, a mass of 1.21 M☉, an estimated bolometric luminosity of 2.551 L☉. Stellar evolution modeling indicates an estimated stellar age of 2.63 Gyr and a metallicity of [Fe/H] = -0.03 dex (near-solar heavy-element abundance). From Earth, Kepler-1435 shines at apparent V-band magnitude 12.984 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere.

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