Kepler-830 b

Astrophysical Synthesis & Habitability Characterization

Kepler-830 b is a confirmed super-earth exoplanet orbiting the star Kepler-830, located approximately 3659.5 light-years (1122 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0197% across the stellar disk), this world measures 1.7 Earth radii and has a measured mass of 3.53 Earth masses. Combining its mass and radius yields a mean bulk density of 3.96 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.22 g⊕ (11.96 m/s²), and an escape velocity of 16.1 km/s.

In its orbital architecture around Kepler-830, Kepler-830 b completes one full revolution every 11.297 Earth days at a semi-major axis of 0.1033 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 99.5 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 907 K (+634°C / +1173°F) and receiving 160.18 S⊕ (~218,005 W/m²), Kepler-830 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.

The host star Kepler-830 is classified as a stellar host with an effective photospheric temperature of 6,037 K, a radius of 1.11 R☉, a mass of 1.07 M☉, an estimated bolometric luminosity of 1.468 L☉. Stellar evolution modeling indicates an estimated stellar age of 3.47 Gyr and a metallicity of [Fe/H] = -0.02 dex (near-solar heavy-element abundance). From Earth, Kepler-830 shines at apparent V-band magnitude 14.88 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere.

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