K2-183 b
Astrophysical Synthesis & Habitability Characterization
K2-183 b is a confirmed terrestrial exoplanet orbiting the star K2-183, located approximately 1073.2 light-years (329.04 parsecs) from the Solar System. First announced in 2018 by K2 using the Transit detection technique (producing an estimated primary transit depth of 0.0134% across the stellar disk), this world measures 1.1 Earth radii and has a measured mass of 1.37 Earth masses. Combining its mass and radius yields a mean bulk density of 5.68 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.13 g⊕ (11.08 m/s²), and an escape velocity of 12.5 km/s.
In its orbital architecture around K2-183, K2-183 b completes one full revolution every 0.469 Earth days.
ℹ️ Thermal & Atmospheric Regime: Current photometric and spectroscopic constraints for K2-183 b place it outside the conservative habitable zone definition pending further atmospheric characterization.
The host star K2-183 is classified as a stellar host with an effective photospheric temperature of 5,482 K, a radius of 0.87 R☉, a mass of 0.9422 M☉, an estimated bolometric luminosity of 0.613 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = 0.09 dex (metal-rich relative to the Sun). From Earth, K2-183 shines at apparent V-band magnitude 12.867 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere. The K2-183 system is a multi-planet architecture hosting 3 confirmed worlds, with K2-183 b sharing its stellar neighborhood alongside K2-183 c, K2-183 d.
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: K2 · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | K2-183 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,482 K |
| Stellar Radius | 0.8700 R☉ |
| Stellar Mass | 0.9422 M☉ |
| Bolometric Luminosity | 0.613 L☉ |
| Metallicity [Fe/H] | 0.090 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 12.867 · G: 12.670 |
| System Architecture | 1 Star, 3 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 0.469 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 90.1000° |
| Mean Bulk Density | 5.68 g/cm³ (12.5 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1073.200 LY (329.041 pc) |