Kepler-1283 b

Astrophysical Synthesis & Habitability Characterization

Kepler-1283 b is a confirmed super-earth exoplanet orbiting the star Kepler-1283, located approximately 9530.2 light-years (2921.99 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0196% across the stellar disk), this world measures 1.91 Earth radii and has a measured mass of 4.31 Earth masses. Combining its mass and radius yields a mean bulk density of 3.41 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 16.8 km/s.

In its orbital architecture around Kepler-1283, Kepler-1283 b completes one full revolution every 12.946 Earth days at a semi-major axis of 0.1062 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 89.2 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 764 K (+491°C / +916°F) and receiving 80.34 S⊕ (~109,343 W/m²), Kepler-1283 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.

The host star Kepler-1283 is classified as a stellar host with an effective photospheric temperature of 6,175 K, a radius of 1.25 R☉, a mass of 1.16 M☉, an estimated bolometric luminosity of 2.038 L☉. Stellar evolution modeling indicates an estimated stellar age of 2.88 Gyr and a metallicity of [Fe/H] = 0.04 dex (near-solar heavy-element abundance). From Earth, Kepler-1283 shines at apparent V-band magnitude 15.269 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere.

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