POTS-1 b

Astrophysical Synthesis & Habitability Characterization

POTS-1 b is a confirmed gas giant exoplanet orbiting the star POTS-1, located approximately 2439.5 light-years (747.96 parsecs) from the Solar System. First announced in 2013 by La Silla Observatory using the Transit detection technique (producing an estimated primary transit depth of 2.7048% across the stellar disk), this world measures 10.548 Earth radii (0.94 Jupiter radii) and has a measured mass of 734.16 Earth masses (2.31 Jupiter masses). Combining its mass and radius yields a mean bulk density of 3.45 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 6.6 g⊕ (64.72 m/s²), and an escape velocity of 93.3 km/s.

In its orbital architecture around POTS-1, POTS-1 b completes one full revolution every 3.161 Earth days at a semi-major axis of 0.03734 AU (an ultra-close orbit less than one-seventh of Mercury's 0.387 AU distance from the Sun, where strong stellar tidal forces typically induce synchronous rotation). Its mean orbital velocity is approximately 128.5 km/s (compared to Earth's 29.8 km/s).

⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 842 K (+569°C / +1056°F) and receiving 58.72 S⊕ (~79,912 W/m²), POTS-1 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.

The host star POTS-1 is classified as an orange K-type star of spectral type K5 V with an effective photospheric temperature of 4,400 K, a radius of 0.588 R☉, a mass of 0.695 M☉, an estimated bolometric luminosity of 0.116 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = -0.03 dex (near-solar heavy-element abundance). From Earth, POTS-1 shines at apparent V-band magnitude 17.908 (faint and requiring research-grade or CCD telescopic photometry) in the Southern celestial hemisphere.

Discovery Facility: La Silla Observatory · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).