Kepler-314 c
Astrophysical Synthesis & Habitability Characterization
Kepler-314 c is a confirmed sub-neptune exoplanet orbiting the star Kepler-314, located approximately 877 light-years (268.88 parsecs) from the Solar System. First announced in 2014 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0783% across the stellar disk), this world measures 2.9 Earth radii and has a measured mass of 8.75 Earth masses. Combining its mass and radius yields a mean bulk density of 1.98 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 1.04 g⊕ (10.2 m/s²), and an escape velocity of 19.4 km/s.
In its orbital architecture around Kepler-314, Kepler-314 c completes one full revolution every 5.96 Earth days at a semi-major axis of 0.064 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 116.8 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 890 K (+617°C / +1143°F) and receiving 149.98 S⊕ (~204,119 W/m²), Kepler-314 c orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-314 is classified as a stellar host with an effective photospheric temperature of 5,378 K, a radius of 0.95 R☉, a mass of 0.99 M☉, an estimated bolometric luminosity of 0.677 L☉. Stellar evolution modeling indicates an estimated stellar age of 0.98 Gyr and a metallicity of [Fe/H] = 0.322 dex (metal-rich relative to the Sun). From Earth, Kepler-314 shines at apparent V-band magnitude 12.64 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere. The Kepler-314 system is a multi-planet architecture hosting 2 confirmed worlds, with Kepler-314 c sharing its stellar neighborhood alongside Kepler-314 b.
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-314 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,378 K |
| Stellar Radius | 0.9500 R☉ |
| Stellar Mass | 0.9900 M☉ |
| Bolometric Luminosity | 0.677 L☉ |
| Metallicity [Fe/H] | 0.322 dex |
| Stellar Age | 0.980 Gyr |
| Apparent Magnitude | V: 12.640 · G: 12.523 |
| System Architecture | 1 Star, 2 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.064000 AU |
| Orbital Period | 5.96 days |
| Mean Orbital Velocity | 116.8 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 85.5700° |
| Mean Bulk Density | 1.98 g/cm³ (19.4 km/s vesc) |
| Insolation Flux | 149.9770 S⊕ (~204,119 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 877.000 LY (268.881 pc) |