Kepler-1110 b

Astrophysical Synthesis & Habitability Characterization

Kepler-1110 b is a confirmed sub-neptune exoplanet orbiting the star Kepler-1110, located approximately 2370.6 light-years (726.83 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.1214% across the stellar disk), this world measures 2.66 Earth radii and has a measured mass of 7.56 Earth masses. Combining its mass and radius yields a mean bulk density of 2.21 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.07 g⊕ (10.49 m/s²), and an escape velocity of 18.9 km/s.

In its orbital architecture around Kepler-1110, Kepler-1110 b completes one full revolution every 9.693 Earth days at a semi-major axis of 0.0754 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 84.6 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 609 K (+336°C / +637°F) and receiving 43.14 S⊕ (~58,708 W/m²), Kepler-1110 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.

The host star Kepler-1110 is classified as a stellar host with an effective photospheric temperature of 4,781 K, a radius of 0.7 R☉, a mass of 0.73 M☉, an estimated bolometric luminosity of 0.23 L☉. Stellar evolution modeling indicates an estimated stellar age of 4.79 Gyr and a metallicity of [Fe/H] = -0.16 dex (metal-poor relative to the Sun). From Earth, Kepler-1110 shines at apparent V-band magnitude 16.274 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere.

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