Kepler-1952 b

Astrophysical Synthesis & Habitability Characterization

Kepler-1952 b is a confirmed terrestrial exoplanet orbiting the star Kepler-1952, located approximately 2779.1 light-years (852.06 parsecs) from the Solar System. First announced in 2021 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0076% across the stellar disk), this world measures 1.239 Earth radii and has a measured mass of 2.07 Earth masses. Combining its mass and radius yields a mean bulk density of 6 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.35 g⊕ (13.24 m/s²), and an escape velocity of 14.5 km/s.

In its orbital architecture around Kepler-1952, Kepler-1952 b completes one full revolution every 27.211 Earth days at a semi-major axis of 0.1724 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 68.9 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 725 K (+452°C / +846°F) and receiving 65.27 S⊕ (~88,832 W/m²), Kepler-1952 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.

The host star Kepler-1952 is classified as a stellar host with an effective photospheric temperature of 5,973 K, a radius of 1.305 R☉, a mass of 0.922 M☉, an estimated bolometric luminosity of 1.945 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = -0.34 dex (metal-poor relative to the Sun). From Earth, Kepler-1952 shines at apparent V-band magnitude 13.828 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere.

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