TIC 290487717 b

Astrophysical Synthesis & Habitability Characterization

TIC 290487717 b is a confirmed gas giant exoplanet orbiting the star TIC 290487717, located approximately 1290.2 light-years (395.57 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 0.4158% across the stellar disk), this world measures 6.638 Earth radii (0.59 Jupiter radii) and has a measured mass of 35.7 Earth masses (0.11 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.67 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.81 g⊕ (7.94 m/s²), and an escape velocity of 25.9 km/s.

In its orbital architecture around TIC 290487717, TIC 290487717 b completes one full revolution every 3.401 Earth days.

☁️ Atmospheric Regime (Volatile / Gas Envelope): With a radius of 6.638 R⊕, TIC 290487717 b exceeds the empirical ~1.8–2.2 R⊕ Fulton radius valley threshold, indicating a substantial hydrogen-helium or supercritical volatile envelope without a conventional solid terrestrial surface.

The host star TIC 290487717 is classified as a stellar host with an effective photospheric temperature of 5,329 K, a radius of 0.9438 R☉, a mass of 0.92 M☉, an estimated bolometric luminosity of 0.645 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = 0.096 dex (metal-rich relative to the Sun). From Earth, TIC 290487717 shines at apparent V-band magnitude 13.492 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere.

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