Kepler-1783 b
Astrophysical Synthesis & Habitability Characterization
Kepler-1783 b is a confirmed super-earth exoplanet orbiting the star Kepler-1783, located approximately 861.3 light-years (264.08 parsecs) from the Solar System. First announced in 2021 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0046% across the stellar disk), this world measures 1.319 Earth radii and has a measured mass of 2.3 Earth masses. Combining its mass and radius yields a mean bulk density of 5.53 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-1783, Kepler-1783 b completes one full revolution every 8.277 Earth days at a semi-major axis of 0.07595 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 99.8 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 1088 K (+815°C / +1499°F) and receiving 65.50 S⊕ (~89,146 W/m²), Kepler-1783 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-1783 is classified as a stellar host with an effective photospheric temperature of 5,129 K, a radius of 1.781 R☉, a mass of 0.887 M☉, an estimated bolometric luminosity of 1.969 L☉. Stellar evolution modeling indicates an estimated stellar age of 1.15 Gyr and a metallicity of [Fe/H] = -0.16 dex (metal-poor relative to the Sun). From Earth, Kepler-1783 shines at apparent V-band magnitude 13.309 (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-1783 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,129 K |
| Stellar Radius | 1.7810 R☉ |
| Stellar Mass | 0.8870 M☉ |
| Bolometric Luminosity | 1.969 L☉ |
| Metallicity [Fe/H] | -0.160 dex |
| Stellar Age | 1.150 Gyr |
| Apparent Magnitude | V: 13.309 · G: 13.098 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.075950 AU |
| Orbital Period | 8.277 days |
| Mean Orbital Velocity | 99.8 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 89.3500° |
| Mean Bulk Density | 5.53 g/cm³ (14.8 km/s vesc) |
| Insolation Flux | 65.5000 S⊕ (~89,146 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 861.300 LY (264.078 pc) |