TIC 183374187 b

Astrophysical Synthesis & Habitability Characterization

TIC 183374187 b is a confirmed gas giant exoplanet orbiting the star TIC 183374187, located approximately 3942.4 light-years (1208.75 parsecs) from the Solar System. First announced in 2026 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 0.9164% across the stellar disk), this world measures 14.034 Earth radii (1.25 Jupiter radii) and has a measured mass of 177.984 Earth masses (0.56 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.36 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.9 g⊕ (8.83 m/s²), and an escape velocity of 39.8 km/s.

In its orbital architecture around TIC 183374187, TIC 183374187 b completes one full revolution every 5.059 Earth days. The planet follows a highly eccentric trajectory (e = 0.506), pointing to past dynamical scattering or secular gravitational perturbations.

⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1379 K (+1106°C / +2023°F), TIC 183374187 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.

The host star TIC 183374187 is classified as a stellar host with an effective photospheric temperature of 5,768 K, a radius of 1.344 R☉, a mass of 0.853 M☉, an estimated bolometric luminosity of 1.794 L☉. Stellar evolution modeling indicates an estimated stellar age of 12.31 Gyr and a metallicity of [Fe/H] = -0.39 dex (metal-poor relative to the Sun). From Earth, TIC 183374187 shines at apparent V-band magnitude 14.639 (faint and requiring research-grade or CCD telescopic photometry) in the Southern celestial hemisphere.

Discovery Facility: Transiting Exoplanet Survey Satellite (TESS) · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).