Kepler-367 c
Astrophysical Synthesis & Habitability Characterization
Kepler-367 c is a confirmed terrestrial exoplanet orbiting the star Kepler-367, located approximately 613.3 light-years (188.03 parsecs) from the Solar System. First announced in 2014 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0251% across the stellar disk), this world measures 1.2 Earth radii and has a measured mass of 1.87 Earth masses. Combining its mass and radius yields a mean bulk density of 5.97 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.3 g⊕ (12.75 m/s²), and an escape velocity of 14 km/s.
In its orbital architecture around Kepler-367, Kepler-367 c completes one full revolution every 53.579 Earth days at a semi-major axis of 0.253 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 51.4 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 357 K (+84°C / +183°F) and receiving 3.76 S⊕ (~5,119 W/m²), Kepler-367 c orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-367 is classified as a stellar host with an effective photospheric temperature of 4,710 K, a radius of 0.695 R☉, a mass of 0.768 M☉, an estimated bolometric luminosity of 0.213 L☉. Stellar evolution modeling indicates an estimated stellar age of 2.29 Gyr and a metallicity of [Fe/H] = 0.197 dex (metal-rich relative to the Sun). From Earth, Kepler-367 shines at apparent V-band magnitude 13.193 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere. The Kepler-367 system is a multi-planet architecture hosting 2 confirmed worlds, with Kepler-367 c sharing its stellar neighborhood alongside Kepler-367 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-367 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 4,710 K |
| Stellar Radius | 0.6950 R☉ |
| Stellar Mass | 0.7680 M☉ |
| Bolometric Luminosity | 0.213 L☉ |
| Metallicity [Fe/H] | 0.197 dex |
| Stellar Age | 2.290 Gyr |
| Apparent Magnitude | V: 13.193 · G: 12.848 |
| System Architecture | 1 Star, 2 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.253000 AU |
| Orbital Period | 53.579 days |
| Mean Orbital Velocity | 51.4 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 89.1600° |
| Mean Bulk Density | 5.97 g/cm³ (14 km/s vesc) |
| Insolation Flux | 3.7610 S⊕ (~5,119 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 613.300 LY (188.027 pc) |