GJ 341 b

Astrophysical Synthesis & Habitability Characterization

GJ 341 b is a confirmed terrestrial exoplanet orbiting the star GJ 341, located approximately 34.1 light-years (10.45 parsecs) from the Solar System. First announced in 2025 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 0.0254% across the stellar disk), this world measures 0.88 Earth radii and has a measured mass of 4 Earth masses. Combining its mass and radius yields a mean bulk density of 32.37 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 5.17 g⊕ (50.7 m/s²), and an escape velocity of 23.8 km/s.

In its orbital architecture around GJ 341, GJ 341 b completes one full revolution every 7.577 Earth days. 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 629 K (+356°C / +673°F) and receiving 13.80 S⊕ (~18,782 W/m²), GJ 341 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.

The host star GJ 341 is classified as a low-mass red dwarf of spectral type M1 with an effective photospheric temperature of 3,770 K, a radius of 0.5066 R☉, a mass of 0.48 M☉, an estimated bolometric luminosity of 0.047 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = -0.16 dex (metal-poor relative to the Sun). From Earth, GJ 341 shines at apparent V-band magnitude 9.49 (accessible to binoculars and small amateur telescopes) in the Southern celestial hemisphere.

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