Kepler-1534 b

Astrophysical Synthesis & Habitability Characterization

Kepler-1534 b is a confirmed super-earth exoplanet orbiting the star Kepler-1534, located approximately 3610.5 light-years (1107 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0406% across the stellar disk), this world measures 1.89 Earth radii and has a measured mass of 4.23 Earth masses. Combining its mass and radius yields a mean bulk density of 3.45 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.18 g⊕ (11.57 m/s²), and an escape velocity of 16.7 km/s.

In its orbital architecture around Kepler-1534, Kepler-1534 b completes one full revolution every 5.717 Earth days at a semi-major axis of 0.0599 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 114 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 955 K (+682°C / +1260°F) and receiving 196.51 S⊕ (~267,450 W/m²), Kepler-1534 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.

The host star Kepler-1534 is classified as a stellar host with an effective photospheric temperature of 5,442 K, a radius of 0.86 R☉, a mass of 0.9 M☉, an estimated bolometric luminosity of 0.582 L☉. Stellar evolution modeling indicates an estimated stellar age of 4.57 Gyr and a metallicity of [Fe/H] = -0.01 dex (near-solar heavy-element abundance). From Earth, Kepler-1534 shines at apparent V-band magnitude 16.429 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere.

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