Kepler-1913 b

Astrophysical Synthesis & Habitability Characterization

Kepler-1913 b is a confirmed super-earth exoplanet orbiting the star Kepler-1913, located approximately 2858.1 light-years (876.3 parsecs) from the Solar System. First announced in 2021 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0168% across the stellar disk), this world measures 1.519 Earth radii and has a measured mass of 2.92 Earth masses. Combining its mass and radius yields a mean bulk density of 4.59 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.27 g⊕ (12.45 m/s²), and an escape velocity of 15.5 km/s.

In its orbital architecture around Kepler-1913, Kepler-1913 b completes one full revolution every 14.196 Earth days at a semi-major axis of 0.1209 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 92.7 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 818 K (+545°C / +1013°F) and receiving 105.70 S⊕ (~143,858 W/m²), Kepler-1913 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.

The host star Kepler-1913 is classified as a stellar host with an effective photospheric temperature of 6,214 K, a radius of 1.076 R☉, a mass of 1.169 M☉, an estimated bolometric luminosity of 1.549 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = 0.07 dex (metal-rich relative to the Sun). From Earth, Kepler-1913 shines at apparent V-band magnitude 14.814 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere.

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