Kepler-1743 b

Astrophysical Synthesis & Habitability Characterization

Kepler-1743 b is a confirmed super-earth exoplanet orbiting the star Kepler-1743, located approximately 1757.4 light-years (538.81 parsecs) from the Solar System. First announced in 2021 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0083% across the stellar disk), this world measures 1.599 Earth radii and has a measured mass of 3.18 Earth masses. Combining its mass and radius yields a mean bulk density of 4.29 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.24 g⊕ (12.16 m/s²), and an escape velocity of 15.8 km/s.

In its orbital architecture around Kepler-1743, Kepler-1743 b completes one full revolution every 7.65 Earth days at a semi-major axis of 0.084 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 119.5 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 1144 K (+871°C / +1600°F) and receiving 515.00 S⊕ (~700,915 W/m²), Kepler-1743 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.

The host star Kepler-1743 is classified as a stellar host with an effective photospheric temperature of 5,855 K, a radius of 1.613 R☉, a mass of 1.266 M☉, an estimated bolometric luminosity of 2.743 L☉. Stellar evolution modeling indicates an estimated stellar age of 3.72 Gyr and a metallicity of [Fe/H] = 0.4 dex (metal-rich relative to the Sun). From Earth, Kepler-1743 shines at apparent V-band magnitude 12.062 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere.

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