TIC 206466666 b
Astrophysical Synthesis & Habitability Characterization
TIC 206466666 b is a confirmed sub-neptune exoplanet orbiting the star TIC 206466666, located approximately 416.9 light-years (127.84 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 0.0871% across the stellar disk), this world measures 2.148 Earth radii and has a measured mass of 5.26 Earth masses. Combining its mass and radius yields a mean bulk density of 2.93 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.14 g⊕ (11.18 m/s²), and an escape velocity of 17.5 km/s.
In its orbital architecture around TIC 206466666, TIC 206466666 b completes one full revolution every 9.105 Earth days.
ℹ️ Thermal & Atmospheric Regime: Current photometric and spectroscopic constraints for TIC 206466666 b place it outside the conservative habitable zone definition pending further atmospheric characterization.
The host star TIC 206466666 is classified as a stellar host with an effective photospheric temperature of 4,620 K, a radius of 0.6672 R☉, a mass of 0.76 M☉, an estimated bolometric luminosity of 0.182 L☉. From Earth, TIC 206466666 shines at apparent V-band magnitude 12.476 (faint and requiring research-grade or CCD telescopic photometry) in the Southern 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 206466666 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 4,620 K |
| Stellar Radius | 0.6672 R☉ |
| Stellar Mass | 0.7600 M☉ |
| Bolometric Luminosity | 0.182 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | V: 12.476 · G: 12.160 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 9.105 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 88.6750° |
| Mean Bulk Density | 2.93 g/cm³ (17.5 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 416.900 LY (127.837 pc) |