OGLE-2017-BLG-0482L b
Astrophysical Synthesis & Habitability Characterization
OGLE-2017-BLG-0482L b is a confirmed sub-neptune exoplanet orbiting the star OGLE-2017-BLG-0482L, located approximately 18917 light-years (5800 parsecs) from the Solar System. First announced in 2018 by OGLE using the Microlensing detection technique (detected via relativistic gravitational lensing of a background source star), this world measures 2.95 Earth radii and has a measured mass of 9 Earth masses. Combining its mass and radius yields a mean bulk density of 1.93 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 1.03 g⊕ (10.1 m/s²), and an escape velocity of 19.5 km/s.
☁️ Atmospheric Regime (Volatile / Gas Envelope): With a radius of 2.950 R⊕, OGLE-2017-BLG-0482L b exceeds the empirical ~1.8–2.2 R⊕ Fulton radius valley threshold, indicating a substantial hydrogen-helium or supercritical volatile envelope without a conventional solid terrestrial surface.
The host star OGLE-2017-BLG-0482L is classified as a stellar host with a mass of 0.2 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-0482L |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | — |
| Stellar Radius | — |
| Stellar Mass | 0.2000 M☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | — |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 1.800000 AU |
| Orbital Period | — |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 1.93 g/cm³ (19.5 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 18917.000 LY (5800.000 pc) |