Kepler-1244 b

Astrophysical Synthesis & Habitability Characterization

Kepler-1244 b is a confirmed super-earth exoplanet orbiting the star Kepler-1244, located approximately 3508.8 light-years (1075.81 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0049% across the stellar disk), this world measures 1.35 Earth radii and has a measured mass of 2.39 Earth masses. Combining its mass and radius yields a mean bulk density of 5.36 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.31 g⊕ (12.85 m/s²), and an escape velocity of 14.9 km/s.

In its orbital architecture around Kepler-1244, Kepler-1244 b completes one full revolution every 3.704 Earth days at a semi-major axis of 0.0502 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 147.4 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 1839 K (+1566°C / +2851°F) and receiving 4,756.33 S⊕ (~6,473,358 W/m²), Kepler-1244 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.

The host star Kepler-1244 is classified as a stellar host with an effective photospheric temperature of 6,680 K, a radius of 1.77 R☉, a mass of 1.46 M☉, an estimated bolometric luminosity of 5.597 L☉. Stellar evolution modeling indicates an estimated stellar age of 1.7 Gyr and a metallicity of [Fe/H] = 0.05 dex (near-solar heavy-element abundance). From Earth, Kepler-1244 shines at apparent V-band magnitude 12.444 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere.

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