MOA-2011-BLG-293L b
Astrophysical Synthesis & Habitability Characterization
MOA-2011-BLG-293L b is a confirmed gas giant exoplanet orbiting the star MOA-2011-BLG-293L, located approximately 25179.2 light-years (7720 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 12.9 Earth radii (1.15 Jupiter radii) and has a measured mass of 1500 Earth masses (4.72 Jupiter masses). Combining its mass and radius yields a mean bulk density of 3.85 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 9.01 g⊕ (88.36 m/s²), and an escape velocity of 120.6 km/s.
In its orbital architecture around MOA-2011-BLG-293L, MOA-2011-BLG-293L b completes one full revolution every 3000 Earth days (8.21Julian years) at a semi-major axis of 1.1 AU (comparable to the inner terrestrial zone between Venus, Earth at 1.00 AU, and Mars at 1.52 AU). Its mean orbital velocity is approximately 4 km/s (compared to Earth's 29.8 km/s).
☁️ Atmospheric Regime (Volatile / Gas Envelope): With a radius of 12.900 R⊕, MOA-2011-BLG-293L 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-2011-BLG-293L is classified as a stellar host with a mass of 0.86 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-2011-BLG-293L |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | — |
| Stellar Radius | — |
| Stellar Mass | 0.8600 M☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | — |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 1.100000 AU |
| Orbital Period | 3000 days |
| Mean Orbital Velocity | 4 km/s |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 3.85 g/cm³ (120.6 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 25179.200 LY (7720.000 pc) |