Kepler-1382 b

Astrophysical Synthesis & Habitability Characterization

Kepler-1382 b is a confirmed super-earth exoplanet orbiting the star Kepler-1382, located approximately 2407.9 light-years (738.26 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.01% across the stellar disk), this world measures 1.88 Earth radii and has a measured mass of 4.19 Earth masses. Combining its mass and radius yields a mean bulk density of 3.48 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.19 g⊕ (11.67 m/s²), and an escape velocity of 16.7 km/s.

In its orbital architecture around Kepler-1382, Kepler-1382 b completes one full revolution every 16.358 Earth days at a semi-major axis of 0.14023 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 93.3 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 959 K (+686°C / +1267°F) and receiving 198.47 S⊕ (~270,119 W/m²), Kepler-1382 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.

The host star Kepler-1382 is classified as a stellar host with an effective photospheric temperature of 6,161 K, a radius of 1.72 R☉, a mass of 1.36 M☉, an estimated bolometric luminosity of 3.824 L☉. Stellar evolution modeling indicates an estimated stellar age of 2.75 Gyr and a metallicity of [Fe/H] = 0.3 dex (metal-rich relative to the Sun). From Earth, Kepler-1382 shines at apparent V-band magnitude 12.857 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere.

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