OGLE-TR-211 b

Astrophysical Synthesis & Habitability Characterization

OGLE-TR-211 b is a confirmed gas giant exoplanet orbiting the star OGLE-TR-211, located approximately 4942.1 light-years (1515.26 parsecs) from the Solar System. First announced in 2007 by OGLE using the Transit detection technique (producing an estimated primary transit depth of 0.7262% across the stellar disk), this world measures 15.244 Earth radii (1.36 Jupiter radii) and has a measured mass of 327.351 Earth masses (1.03 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.51 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 1.41 g⊕ (13.83 m/s²), and an escape velocity of 51.8 km/s.

In its orbital architecture around OGLE-TR-211, OGLE-TR-211 b completes one full revolution every 3.677 Earth days at a semi-major axis of 0.051 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 150.9 km/s (compared to Earth's 29.8 km/s). The orbit is modeled as circular (e = 0.00), maintaining a constant stellar distance throughout its year.

⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1686 K (+1413°C / +2575°F) and receiving 710.28 S⊕ (~966,692 W/m²), OGLE-TR-211 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.

The host star OGLE-TR-211 is classified as a stellar host with an effective photospheric temperature of 6,325 K, a radius of 1.64 R☉, a mass of 1.33 M☉, an estimated bolometric luminosity of 3.862 L☉. Stellar evolution modeling indicates an estimated stellar age of 2.6 Gyr and a metallicity of [Fe/H] = 0.11 dex (metal-rich relative to the Sun). From Earth, OGLE-TR-211 shines at apparent V-band magnitude 15.364 (faint and requiring research-grade or CCD telescopic photometry) in the Southern celestial hemisphere.

Discovery Facility: OGLE · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).