Kepler-1192 b

Astrophysical Synthesis & Habitability Characterization

Kepler-1192 b is a confirmed sub-neptune exoplanet orbiting the star Kepler-1192, located approximately 4253.7 light-years (1304.19 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.068% across the stellar disk), this world measures 2.36 Earth radii and has a measured mass of 6.17 Earth masses. Combining its mass and radius yields a mean bulk density of 2.59 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.11 g⊕ (10.89 m/s²), and an escape velocity of 18.1 km/s.

In its orbital architecture around Kepler-1192, Kepler-1192 b completes one full revolution every 25.203 Earth days at a semi-major axis of 0.1693 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 73.1 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 600 K (+327°C / +621°F) and receiving 34.74 S⊕ (~47,284 W/m²), Kepler-1192 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.

The host star Kepler-1192 is classified as a stellar host with an effective photospheric temperature of 5,438 K, a radius of 0.83 R☉, a mass of 0.86 M☉, an estimated bolometric luminosity of 0.541 L☉. Stellar evolution modeling indicates an estimated stellar age of 4.47 Gyr and a metallicity of [Fe/H] = -0.16 dex (metal-poor relative to the Sun). From Earth, Kepler-1192 shines at apparent V-band magnitude 15.858 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere.

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