Kepler-810 b

Astrophysical Synthesis & Habitability Characterization

Kepler-810 b is a confirmed super-earth exoplanet orbiting the star Kepler-810, located approximately 4757.3 light-years (1458.59 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0289% across the stellar disk), this world measures 1.93 Earth radii and has a measured mass of 4.38 Earth masses. Combining its mass and radius yields a mean bulk density of 3.36 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.18 g⊕ (11.57 m/s²), and an escape velocity of 16.9 km/s.

In its orbital architecture around Kepler-810, Kepler-810 b completes one full revolution every 4.597 Earth days at a semi-major axis of 0.055 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 130.2 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 1105 K (+832°C / +1530°F) and receiving 350.60 S⊕ (~477,163 W/m²), Kepler-810 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.

The host star Kepler-810 is classified as a stellar host with an effective photospheric temperature of 5,803 K, a radius of 1.04 R☉, a mass of 1.03 M☉, an estimated bolometric luminosity of 1.1 L☉. Stellar evolution modeling indicates an estimated stellar age of 4.17 Gyr and a metallicity of [Fe/H] = 0.1 dex (metal-rich relative to the Sun). From Earth, Kepler-810 shines at apparent V-band magnitude 15.73 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere.

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