Kepler-1882 b

Astrophysical Synthesis & Habitability Characterization

Kepler-1882 b is a confirmed super-earth exoplanet orbiting the star Kepler-1882, located approximately 1446.1 light-years (443.37 parsecs) from the Solar System. First announced in 2021 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0087% across the stellar disk), this world measures 1.487 Earth radii and has a measured mass of 2.81 Earth masses. Combining its mass and radius yields a mean bulk density of 4.71 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 15.4 km/s.

In its orbital architecture around Kepler-1882, Kepler-1882 b completes one full revolution every 13.787 Earth days at a semi-major axis of 0.11636 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 91.8 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 894 K (+621°C / +1150°F) and receiving 122.10 S⊕ (~166,178 W/m²), Kepler-1882 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.

The host star Kepler-1882 is classified as a stellar host with an effective photospheric temperature of 5,691 K, a radius of 1.458 R☉, a mass of 1.068 M☉, an estimated bolometric luminosity of 2.001 L☉. Stellar evolution modeling indicates an estimated stellar age of 6.61 Gyr and a metallicity of [Fe/H] = 0.26 dex (metal-rich relative to the Sun). From Earth, Kepler-1882 shines at apparent V-band magnitude 12.516 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere.

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