Kepler-1833 b

Astrophysical Synthesis & Habitability Characterization

Kepler-1833 b is a confirmed super-earth exoplanet orbiting the star Kepler-1833, located approximately 1929.5 light-years (591.6 parsecs) from the Solar System. First announced in 2021 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0068% across the stellar disk), this world measures 1.3 Earth radii and has a measured mass of 2.24 Earth masses. Combining its mass and radius yields a mean bulk density of 5.62 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.33 g⊕ (13.04 m/s²), and an escape velocity of 14.7 km/s.

In its orbital architecture around Kepler-1833, Kepler-1833 b completes one full revolution every 6.892 Earth days at a semi-major axis of 0.07545 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 119.1 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 1177 K (+904°C / +1659°F) and receiving 439.20 S⊕ (~597,751 W/m²), Kepler-1833 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.

The host star Kepler-1833 is classified as a stellar host with an effective photospheric temperature of 6,164 K, a radius of 1.446 R☉, a mass of 1.286 M☉, an estimated bolometric luminosity of 2.708 L☉. Stellar evolution modeling indicates an estimated stellar age of 3.89 Gyr and a metallicity of [Fe/H] = 0.38 dex (metal-rich relative to the Sun). From Earth, Kepler-1833 shines at apparent V-band magnitude 12.645 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere.

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