OGLE-2005-BLG-169L b
Astrophysical Synthesis & Habitability Characterization
OGLE-2005-BLG-169L b is a confirmed sub-neptune exoplanet orbiting the star OGLE-2005-BLG-169L, located approximately 13372.4 light-years (4100 parsecs) from the Solar System. First announced in 2006 by OGLE using the Microlensing detection technique (detected via relativistic gravitational lensing of a background source star), this world measures 3.84 Earth radii (0.34 Jupiter radii) and has a measured mass of 14.1 Earth masses. Combining its mass and radius yields a mean bulk density of 1.37 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.96 g⊕ (9.41 m/s²), and an escape velocity of 21.4 km/s.
☁️ Atmospheric Regime (Volatile / Gas Envelope): With a radius of 3.840 R⊕, OGLE-2005-BLG-169L 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-2005-BLG-169L is classified as an orange K-type star of spectral type K5 with a mass of 0.69 M☉. From Earth, OGLE-2005-BLG-169L shines at apparent V-band magnitude 22.783 (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: OGLE · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | OGLE-2005-BLG-169L |
| Spectral Type | K5 |
| Effective Temp (Teff) | — |
| Stellar Radius | — |
| Stellar Mass | 0.6900 M☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | V: 22.783 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 3.500000 AU |
| Orbital Period | — |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 1.37 g/cm³ (21.4 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 13372.400 LY (4100.000 pc) |