MOA-2020-BLG-108L b
Astrophysical Synthesis & Habitability Characterization
MOA-2020-BLG-108L b is a confirmed gas giant exoplanet orbiting the star MOA-2020-BLG-108L, located approximately 16731.8 light-years (5130 parsecs) from the Solar System. First announced in 2026 by MOA using the Microlensing detection technique (detected via relativistic gravitational lensing of a background source star), this world measures 12.4 Earth radii (1.11 Jupiter radii) and has a measured mass of 3391.229 Earth masses (10.67 Jupiter masses). Combining its mass and radius yields a mean bulk density of 9.81 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 22.06 g⊕ (216.33 m/s²), and an escape velocity of 185 km/s.
☁️ Atmospheric Regime (Volatile / Gas Envelope): With a radius of 12.400 R⊕, MOA-2020-BLG-108L 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 MOA-2020-BLG-108L is classified as a stellar host with a mass of 0.58 M☉. From Earth, MOA-2020-BLG-108L shines at apparent V-band magnitude 26.34 (faint and requiring research-grade or CCD telescopic photometry) in the Southern 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: MOA · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | MOA-2020-BLG-108L |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | — |
| Stellar Radius | — |
| Stellar Mass | 0.5800 M☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | V: 26.340 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 3.690000 AU |
| Orbital Period | — |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 9.81 g/cm³ (185 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 16731.800 LY (5130.000 pc) |