OGLE-TR-182 b

Astrophysical Synthesis & Habitability Characterization

OGLE-TR-182 b is a confirmed gas giant exoplanet orbiting the star OGLE-TR-182, located approximately 8159.6 light-years (2501.75 parsecs) from the Solar System. First announced in 2007 by OGLE using the Transit detection technique (producing an estimated primary transit depth of 1.0376% across the stellar disk), this world measures 12.666 Earth radii (1.13 Jupiter radii) and has a measured mass of 320.995 Earth masses (1.01 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.87 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 2 g⊕ (19.61 m/s²), and an escape velocity of 56.3 km/s.

In its orbital architecture around OGLE-TR-182, OGLE-TR-182 b completes one full revolution every 3.979 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 139.4 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 1550 K (+1277°C / +2331°F) and receiving 669.04 S⊕ (~910,560 W/m²), OGLE-TR-182 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.

The host star OGLE-TR-182 is classified as a stellar host with an effective photospheric temperature of 5,924 K, a radius of 1.14 R☉, a mass of 1.14 M☉, an estimated bolometric luminosity of 1.436 L☉. Stellar evolution modeling indicates an estimated stellar age of 4.3 Gyr and a metallicity of [Fe/H] = 0.37 dex (metal-rich relative to the Sun). From Earth, OGLE-TR-182 shines at apparent V-band magnitude 16.92 (faint and requiring research-grade or CCD telescopic photometry) in the Southern celestial hemisphere.

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