Kepler-1319 b
Astrophysical Synthesis & Habitability Characterization
Kepler-1319 b is a confirmed super-earth exoplanet orbiting the star Kepler-1319, located approximately 338.9 light-years (103.92 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0518% across the stellar disk), this world measures 1.34 Earth radii and has a measured mass of 2.36 Earth masses. Combining its mass and radius yields a mean bulk density of 5.41 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.31 g⊕ (12.85 m/s²), and an escape velocity of 14.8 km/s.
In its orbital architecture around Kepler-1319, Kepler-1319 b completes one full revolution every 2.887 Earth days at a semi-major axis of 0.0296 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 111.6 km/s (compared to Earth's 29.8 km/s). The planet follows a highly eccentric trajectory (e = 0.33, swinging from 0.0198 AU at periapsis out to 0.0394 AU at apoapsis), pointing to past dynamical scattering or secular gravitational perturbations.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 557 K (+284°C / +543°F) and receiving 38.45 S⊕ (~52,333 W/m²), Kepler-1319 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-1319 is classified as a stellar host with an effective photospheric temperature of 3,655 K, a radius of 0.54 R☉, a mass of 0.56 M☉, an estimated bolometric luminosity of 0.047 L☉. Stellar evolution modeling indicates an estimated stellar age of 5.37 Gyr and a metallicity of [Fe/H] = 0.44 dex (metal-rich relative to the Sun). From Earth, Kepler-1319 shines at apparent V-band magnitude 15.161 (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-1319 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 3,655 K |
| Stellar Radius | 0.5400 R☉ |
| Stellar Mass | 0.5600 M☉ |
| Bolometric Luminosity | 0.047 L☉ |
| Metallicity [Fe/H] | 0.440 dex |
| Stellar Age | 5.370 Gyr |
| Apparent Magnitude | V: 15.161 · G: 14.222 |
| System Architecture | 2 Stars, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.029600 AU |
| Orbital Period | 2.887 days |
| Mean Orbital Velocity | 111.6 km/s |
| Orbital Eccentricity (e) | 0.33000 |
| Orbital Inclination (i) | 84.9100° |
| Mean Bulk Density | 5.41 g/cm³ (14.8 km/s vesc) |
| Insolation Flux | 38.4520 S⊕ (~52,333 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 338.900 LY (103.917 pc) |