TIC 117642575 b
Astrophysical Synthesis & Habitability Characterization
TIC 117642575 b is a confirmed sub-neptune exoplanet orbiting the star TIC 117642575, located approximately 615.6 light-years (188.76 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 0.0575% across the stellar disk), this world measures 2.827 Earth radii and has a measured mass of 8.38 Earth masses. Combining its mass and radius yields a mean bulk density of 2.05 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.05 g⊕ (10.3 m/s²), and an escape velocity of 19.3 km/s.
In its orbital architecture around TIC 117642575, TIC 117642575 b completes one full revolution every 4.945 Earth days.
☁️ Atmospheric Regime (Volatile / Gas Envelope): With a radius of 2.827 R⊕, TIC 117642575 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 117642575 is classified as a stellar host with an effective photospheric temperature of 5,720 K, a radius of 1.081 R☉, a mass of 1.06 M☉, an estimated bolometric luminosity of 1.122 L☉. From Earth, TIC 117642575 shines at apparent V-band magnitude 11.029 (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 117642575 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,720 K |
| Stellar Radius | 1.0810 R☉ |
| Stellar Mass | 1.0600 M☉ |
| Bolometric Luminosity | 1.122 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | V: 11.029 · G: 10.841 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 4.945 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 86.9056° |
| Mean Bulk Density | 2.05 g/cm³ (19.3 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 615.600 LY (188.758 pc) |