Kepler-383 c
Astrophysical Synthesis & Habitability Characterization
Kepler-383 c is a confirmed terrestrial exoplanet orbiting the star Kepler-383, located approximately 1532.9 light-years (470 parsecs) from the Solar System. First announced in 2014 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0286% across the stellar disk), this world measures 1.24 Earth radii and has a measured mass of 2.07 Earth masses. Combining its mass and radius yields a mean bulk density of 5.99 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.35 g⊕ (13.24 m/s²), and an escape velocity of 14.5 km/s.
In its orbital architecture around Kepler-383, Kepler-383 c completes one full revolution every 31.201 Earth days at a semi-major axis of 0.172 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 60 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 406 K (+133°C / +271°F) and receiving 6.44 S⊕ (~8,765 W/m²), Kepler-383 c orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-383 is classified as a stellar host with an effective photospheric temperature of 4,710 K, a radius of 0.672 R☉, a mass of 0.669 M☉, an estimated bolometric luminosity of 0.199 L☉. Stellar evolution modeling indicates an estimated stellar age of 13.9 Gyr and a metallicity of [Fe/H] = -0.179 dex (metal-poor relative to the Sun). From Earth, Kepler-383 shines at apparent V-band magnitude 15.473 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere. The Kepler-383 system is a multi-planet architecture hosting 2 confirmed worlds, with Kepler-383 c sharing its stellar neighborhood alongside Kepler-383 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-383 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 4,710 K |
| Stellar Radius | 0.6720 R☉ |
| Stellar Mass | 0.6690 M☉ |
| Bolometric Luminosity | 0.199 L☉ |
| Metallicity [Fe/H] | -0.179 dex |
| Stellar Age | 13.900 Gyr |
| Apparent Magnitude | V: 15.473 · G: 15.066 |
| System Architecture | 1 Star, 2 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.172000 AU |
| Orbital Period | 31.201 days |
| Mean Orbital Velocity | 60 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 89.0400° |
| Mean Bulk Density | 5.99 g/cm³ (14.5 km/s vesc) |
| Insolation Flux | 6.4400 S⊕ (~8,765 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1532.900 LY (470.000 pc) |