OGLE-2017-BLG-1806L b
Astrophysical Synthesis & Habitability Characterization
OGLE-2017-BLG-1806L b is a confirmed sub-neptune exoplanet orbiting the star OGLE-2017-BLG-1806L, located approximately 20874 light-years (6400 parsecs) from the Solar System. First announced in 2023 by OGLE using the Microlensing detection technique (detected via relativistic gravitational lensing of a background source star), this world measures 2.15 Earth radii and has a measured mass of 5.27 Earth masses. Combining its mass and radius yields a mean bulk density of 2.92 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.14 g⊕ (11.18 m/s²), and an escape velocity of 17.5 km/s.
ℹ️ Thermal & Atmospheric Regime: Current photometric and spectroscopic constraints for OGLE-2017-BLG-1806L b place it outside the conservative habitable zone definition pending further atmospheric characterization.
The host star OGLE-2017-BLG-1806L is classified as a stellar host with a mass of 0.38 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: OGLE · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | OGLE-2017-BLG-1806L |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | — |
| Stellar Radius | — |
| Stellar Mass | 0.3800 M☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | — |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 1.750000 AU |
| Orbital Period | — |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 2.92 g/cm³ (17.5 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 20874.000 LY (6400.000 pc) |