Kepler-383 b
Astrophysical Synthesis & Habitability Characterization
Kepler-383 b is a confirmed super-earth 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 0.0324% across the stellar disk), this world measures 1.32 Earth radii and has a measured mass of 2.3 Earth masses. Combining its mass and radius yields a mean bulk density of 5.51 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.32 g⊕ (12.94 m/s²), and an escape velocity of 14.8 km/s.
In its orbital architecture around Kepler-383, Kepler-383 b completes one full revolution every 12.905 Earth days at a semi-major axis of 0.095 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 80.1 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 545 K (+272°C / +522°F) and receiving 20.91 S⊕ (~28,459 W/m²), Kepler-383 b 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 b sharing its stellar neighborhood alongside Kepler-383 c.
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) | 0.095000 AU |
| Orbital Period | 12.905 days |
| Mean Orbital Velocity | 80.1 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 88.7700° |
| Mean Bulk Density | 5.51 g/cm³ (14.8 km/s vesc) |
| Insolation Flux | 20.9100 S⊕ (~28,459 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1532.900 LY (470.000 pc) |