TIC 219893931 b
Astrophysical Synthesis & Habitability Characterization
TIC 219893931 b is a confirmed sub-neptune exoplanet orbiting the star TIC 219893931, located approximately 1338.7 light-years (410.45 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 0.0435% across the stellar disk), this world measures 2.92 Earth radii and has a measured mass of 8.85 Earth masses. Combining its mass and radius yields a mean bulk density of 1.96 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 1.04 g⊕ (10.2 m/s²), and an escape velocity of 19.5 km/s.
In its orbital architecture around TIC 219893931, TIC 219893931 b completes one full revolution every 6.41 Earth days.
☁️ Atmospheric Regime (Volatile / Gas Envelope): With a radius of 2.920 R⊕, TIC 219893931 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 219893931 is classified as a stellar host with an effective photospheric temperature of 5,956 K, a radius of 1.284 R☉, a mass of 1.14 M☉, an estimated bolometric luminosity of 1.861 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = -2.83 dex (metal-poor relative to the Sun). From Earth, TIC 219893931 shines at apparent V-band magnitude 12.161 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere.
Methodology: Computed using the Schulze-Makuch et al. (2011) weighted metric comparing physical interior (radius, estimated density) and surface thermal regime (escape velocity, equilibrium temperature).
Discovery Facility: Transiting Exoplanet Survey Satellite (TESS) · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | TIC 219893931 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,956 K |
| Stellar Radius | 1.2840 R☉ |
| Stellar Mass | 1.1400 M☉ |
| Bolometric Luminosity | 1.861 L☉ |
| Metallicity [Fe/H] | -2.830 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 12.161 · G: 12.053 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 6.41 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 1.96 g/cm³ (19.5 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1338.700 LY (410.453 pc) |