Kepler-1340 b
Astrophysical Synthesis & Habitability Characterization
Kepler-1340 b is a confirmed super-earth exoplanet orbiting the star Kepler-1340, located approximately 3202.1 light-years (981.78 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.01% across the stellar disk), this world measures 1.55 Earth radii and has a measured mass of 3.02 Earth masses. Combining its mass and radius yields a mean bulk density of 4.47 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.26 g⊕ (12.36 m/s²), and an escape velocity of 15.6 km/s.
In its orbital architecture around Kepler-1340, Kepler-1340 b completes one full revolution every 0.665 Earth days at a semi-major axis of 0.01523 AU (an ultra-close orbit less than one-seventh of Mercury's 0.387 AU distance from the Sun, where strong stellar tidal forces typically induce synchronous rotation). Its mean orbital velocity is approximately 249.1 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 2174 K (+1901°C / +3454°F) and receiving 4,793.00 S⊕ (~6,523,274 W/m²), Kepler-1340 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-1340 is classified as a stellar host with an effective photospheric temperature of 6,331 K, a radius of 1.42 R☉, a mass of 1.27 M☉, an estimated bolometric luminosity of 2.906 L☉. Stellar evolution modeling indicates an estimated stellar age of 2.4 Gyr and a metallicity of [Fe/H] = 0.07 dex (metal-rich relative to the Sun). From Earth, Kepler-1340 shines at apparent V-band magnitude 15.003 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere.
Methodology: Computed using the Schulze-Makuch et al. (2011) weighted metric comparing physical interior (radius, estimated density) and surface thermal regime (escape velocity, equilibrium temperature).
Discovery Facility: Kepler · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | Kepler-1340 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 6,331 K |
| Stellar Radius | 1.4200 R☉ |
| Stellar Mass | 1.2700 M☉ |
| Bolometric Luminosity | 2.906 L☉ |
| Metallicity [Fe/H] | 0.070 dex |
| Stellar Age | 2.400 Gyr |
| Apparent Magnitude | V: 15.003 · G: 14.755 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.015230 AU |
| Orbital Period | 0.665 days |
| Mean Orbital Velocity | 249.1 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 80.4800° |
| Mean Bulk Density | 4.47 g/cm³ (15.6 km/s vesc) |
| Insolation Flux | 4793.0010 S⊕ (~6,523,274 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 3202.100 LY (981.779 pc) |