TIC 88785435 b
Astrophysical Synthesis & Habitability Characterization
TIC 88785435 b is a confirmed sub-neptune exoplanet orbiting the star TIC 88785435, located approximately 399.2 light-years (122.39 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 0.2562% across the stellar disk), this world measures 5.03 Earth radii (0.45 Jupiter radii) and has a measured mass of 22.3 Earth masses. Combining its mass and radius yields a mean bulk density of 0.97 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.88 g⊕ (8.63 m/s²), and an escape velocity of 23.6 km/s.
In its orbital architecture around TIC 88785435, TIC 88785435 b completes one full revolution every 10.509 Earth days at a semi-major axis of 0.08432 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 87.3 km/s (compared to Earth's 29.8 km/s). Its moderate orbital eccentricity of e = 0.131 carries the world between 0.0733 AU at periapsis and 0.0954 AU at apoapsis, driving measurable seasonal insolation cycles.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 635 K (+362°C / +684°F) and receiving 28.33 S⊕ (~38,551 W/m²), TIC 88785435 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TIC 88785435 is classified as an orange K-type star of spectral type K7 V with an effective photospheric temperature of 3,998 K, a radius of 0.911 R☉, a mass of 0.724 M☉, an estimated bolometric luminosity of 0.19 L☉. Stellar evolution modeling indicates an estimated stellar age of 0.016 Gyr and a metallicity of [Fe/H] = -0.08 dex (near-solar heavy-element abundance). From Earth, TIC 88785435 shines at apparent V-band magnitude 13.259 (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 88785435 |
| Spectral Type | K7 V |
| Effective Temp (Teff) | 3,998 K |
| Stellar Radius | 0.9110 R☉ |
| Stellar Mass | 0.7240 M☉ |
| Bolometric Luminosity | 0.19 L☉ |
| Metallicity [Fe/H] | -0.080 dex |
| Stellar Age | 0.016 Gyr |
| Apparent Magnitude | V: 13.259 · G: 12.612 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.084320 AU |
| Orbital Period | 10.509 days |
| Mean Orbital Velocity | 87.3 km/s |
| Orbital Eccentricity (e) | 0.13100 |
| Orbital Inclination (i) | 88.9700° |
| Mean Bulk Density | 0.97 g/cm³ (23.6 km/s vesc) |
| Insolation Flux | 28.3253 S⊕ (~38,551 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 399.200 LY (122.386 pc) |