KMT-2023-BLG-1866L b
Astrophysical Synthesis & Habitability Characterization
KMT-2023-BLG-1866L b is a confirmed super-earth exoplanet orbiting the star KMT-2023-BLG-1866L, located approximately 20254.3 light-years (6210 parsecs) from the Solar System. First announced in 2024 by KMTNet using the Microlensing detection technique (detected via relativistic gravitational lensing of a background source star), this world measures 1.43 Earth radii and has a measured mass of 2.63 Earth masses. Combining its mass and radius yields a mean bulk density of 4.96 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.29 g⊕ (12.65 m/s²), and an escape velocity of 15.2 km/s.
ℹ️ Thermal & Atmospheric Regime: Current photometric and spectroscopic constraints for KMT-2023-BLG-1866L b place it outside the conservative habitable zone definition pending further atmospheric characterization.
The host star KMT-2023-BLG-1866L is classified as a stellar host with a mass of 0.51 M☉.
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: KMTNet · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | KMT-2023-BLG-1866L |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | — |
| Stellar Radius | — |
| Stellar Mass | 0.5100 M☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | — |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 2.630000 AU |
| Orbital Period | — |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 4.96 g/cm³ (15.2 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 20254.300 LY (6210.000 pc) |