Kepler-1274 b

Astrophysical Synthesis & Habitability Characterization

Kepler-1274 b is a confirmed super-earth exoplanet orbiting the star Kepler-1274, located approximately 2004.7 light-years (614.65 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0036% across the stellar disk), this world measures 1.42 Earth radii and has a measured mass of 2.6 Earth masses. Combining its mass and radius yields a mean bulk density of 5.01 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.29 g⊕ (12.65 m/s²), and an escape velocity of 15.1 km/s.

In its orbital architecture around Kepler-1274, Kepler-1274 b completes one full revolution every 6.982 Earth days at a semi-major axis of 0.08161 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 127.2 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 1384 K (+1111°C / +2032°F) and receiving 975.81 S⊕ (~1,328,077 W/m²), Kepler-1274 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.

The host star Kepler-1274 is classified as a stellar host with an effective photospheric temperature of 6,179 K, a radius of 2.17 R☉, a mass of 1.45 M☉, an estimated bolometric luminosity of 6.159 L☉. Stellar evolution modeling indicates an estimated stellar age of 2.88 Gyr and a metallicity of [Fe/H] = 0.11 dex (metal-rich relative to the Sun). From Earth, Kepler-1274 shines at apparent V-band magnitude 11.717 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere.

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