MOA-2010-BLG-477L b
Astrophysical Synthesis & Habitability Characterization
MOA-2010-BLG-477L b is a confirmed gas giant exoplanet orbiting the star MOA-2010-BLG-477L, located approximately 7501.6 light-years (2300 parsecs) from the Solar System. First announced in 2012 by MOA using the Microlensing detection technique (detected via relativistic gravitational lensing of a background source star), this world measures 13.6 Earth radii (1.21 Jupiter radii) and has a measured mass of 480 Earth masses (1.51 Jupiter masses). Combining its mass and radius yields a mean bulk density of 1.05 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 2.6 g⊕ (25.5 m/s²), and an escape velocity of 66.5 km/s.
☁️ Atmospheric Regime (Volatile / Gas Envelope): With a radius of 13.600 R⊕, MOA-2010-BLG-477L 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-2010-BLG-477L is classified as a stellar host with an effective photospheric temperature of 5,950 K, a mass of 0.67 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: MOA · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | MOA-2010-BLG-477L |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,950 K |
| Stellar Radius | — |
| Stellar Mass | 0.6700 M☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | — |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 2.000000 AU |
| Orbital Period | — |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 1.05 g/cm³ (66.5 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 7501.600 LY (2300.000 pc) |