Kepler-1269 b

Astrophysical Synthesis & Habitability Characterization

Kepler-1269 b is a confirmed super-earth exoplanet orbiting the star Kepler-1269, located approximately 3578.7 light-years (1097.23 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0169% across the stellar disk), this world measures 1.63 Earth radii and has a measured mass of 3.29 Earth masses. Combining its mass and radius yields a mean bulk density of 4.19 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.24 g⊕ (12.16 m/s²), and an escape velocity of 15.9 km/s.

In its orbital architecture around Kepler-1269, Kepler-1269 b completes one full revolution every 37.333 Earth days at a semi-major axis of 0.23611 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 68.8 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 657 K (+384°C / +723°F) and receiving 69.00 S⊕ (~93,914 W/m²), Kepler-1269 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.

The host star Kepler-1269 is classified as a stellar host with an effective photospheric temperature of 5,998 K, a radius of 1.15 R☉, a mass of 1.1 M☉, an estimated bolometric luminosity of 1.536 L☉. Stellar evolution modeling indicates an estimated stellar age of 3.55 Gyr and a metallicity of [Fe/H] = 0.07 dex (metal-rich relative to the Sun). From Earth, Kepler-1269 shines at apparent V-band magnitude 13.658 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere.

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