The star
The star
OGLE-2006-BLG-109L
- Type
- star
- Mass
- 0.51 × the Sun
The planets
OGLE-2006-BLG-109L
OGLE-2006-BLG-109L b
- Year
- 4.9 years
- Distance from star
- 2.3 AU
- Mass
- 2.3e+02 Earths
- Size
- 14 × Earth
- Temperature
- ≈ 82 K (-191 °C)
- Found
- 2008, microlensing (OGLE)
OGLE-2006-BLG-109L
OGLE-2006-BLG-109L c
- Year
- 13.5 years
- Distance from star
- 4.5 AU
- Mass
- 86 Earths
- Size
- 11 × Earth
- Temperature
- ≈ 59 K (-214 °C)
- Found
- 2008, microlensing (OGLE)
Masses found by the wobble method are minimums, because the orbit's tilt is unknown. Temperatures are equilibrium estimates for a bare planet, before any atmosphere.
How we know
A lens in space
The system briefly magnified a more distant star; a planet left its own small blip in the brightening.
Sources
- Planet and star parameters: NASA Exoplanet Archive, Planetary Systems Composite Parameters, retrieved 1 Nov 2026. This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with NASA under the Exoplanet Exploration Program.
- Position: HYG Database v4.1 (CC BY-SA 4.0).
- Habitable zone: a simple estimate from the star's brightness (√L × 0.95 to 1.67 AU), shown as a guide.