The star
The star
OGLE2-TR-L9
- Type
- white star
- Surface
- ≈ 6,933 K
- Size
- 1.53 × the Sun
- Mass
- 1.52 × the Sun
- Brightness
- 3.25 × the Sun
- Habitable zone
- 1.27–2.92 AU
The planets
OGLE2-TR-L9
OGLE2-TR-L9 b
- Year
- 2.49 days
- Distance from star
- 0.0308 AU
- Mass
- 4.5 Jupiters
- Size
- 18 × Earth
- Temperature
- ≈ 2034 K (+1761 °C)
- Found
- 2008, transit (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
The shadow
The planet passes in front of its star and dims it by a fraction of a percent, every orbit. The dip gives the planet's size and year.
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.