Kepler-683 b
Astrophysical Synthesis & Habitability Characterization
Kepler-683 b is a confirmed super-earth exoplanet orbiting the star Kepler-683, located approximately 3336.8 light-years (1023.07 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0361% across the stellar disk), this world measures 1.97 Earth radii and has a measured mass of 4.54 Earth masses. Combining its mass and radius yields a mean bulk density of 3.27 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.17 g⊕ (11.47 m/s²), and an escape velocity of 17 km/s.
In its orbital architecture around Kepler-683, Kepler-683 b completes one full revolution every 2.539 Earth days at a semi-major axis of 0.0355 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 152.1 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 1332 K (+1059°C / +1938°F) and receiving 702.28 S⊕ (~955,804 W/m²), Kepler-683 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-683 is classified as a stellar host with an effective photospheric temperature of 5,703 K, a radius of 0.95 R☉, a mass of 0.96 M☉, an estimated bolometric luminosity of 0.857 L☉. Stellar evolution modeling indicates an estimated stellar age of 4.37 Gyr and a metallicity of [Fe/H] = -0.03 dex (near-solar heavy-element abundance). From Earth, Kepler-683 shines at apparent V-band magnitude 15.072 (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-683 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,703 K |
| Stellar Radius | 0.9500 R☉ |
| Stellar Mass | 0.9600 M☉ |
| Bolometric Luminosity | 0.857 L☉ |
| Metallicity [Fe/H] | -0.030 dex |
| Stellar Age | 4.370 Gyr |
| Apparent Magnitude | V: 15.072 · G: 15.001 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.035500 AU |
| Orbital Period | 2.539 days |
| Mean Orbital Velocity | 152.1 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 88.2800° |
| Mean Bulk Density | 3.27 g/cm³ (17 km/s vesc) |
| Insolation Flux | 702.2810 S⊕ (~955,804 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 3336.800 LY (1023.070 pc) |