MOA-2007-BLG-400L b
Astrophysical Synthesis & Habitability Characterization
MOA-2007-BLG-400L b is a confirmed gas giant exoplanet orbiting the star MOA-2007-BLG-400L, located approximately 22472.1 light-years (6890 parsecs) from the Solar System. First announced in 2008 by MOA using the Microlensing detection technique (detected via relativistic gravitational lensing of a background source star), this world measures 13.5 Earth radii (1.2 Jupiter radii) and has a measured mass of 540.308 Earth masses (1.7 Jupiter masses). Combining its mass and radius yields a mean bulk density of 1.21 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 2.96 g⊕ (29.03 m/s²), and an escape velocity of 70.8 km/s.
❄️ Thermal Regime (Cryogenic Zone): With an equilibrium temperature of 34 K (-239°C / -398°F), surface water and volatile species on MOA-2007-BLG-400L b would remain locked in cryogenic ice phases unless warmed by subsurface tidal or radiogenic heating.
The host star MOA-2007-BLG-400L is classified as a stellar host with a mass of 0.69 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-2007-BLG-400L |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | — |
| Stellar Radius | — |
| Stellar Mass | 0.6900 M☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | — |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 5.900000 AU |
| Orbital Period | — |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 1.21 g/cm³ (70.8 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 22472.100 LY (6890.000 pc) |