TIC 87422071 b
Astrophysical Synthesis & Habitability Characterization
TIC 87422071 b is a confirmed gas giant exoplanet orbiting the star TIC 87422071, located approximately 1254.9 light-years (384.76 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 0.4473% across the stellar disk), this world measures 10.862 Earth radii (0.97 Jupiter radii) and has a measured mass of 409.999 Earth masses (1.29 Jupiter masses). Combining its mass and radius yields a mean bulk density of 1.76 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 3.48 g⊕ (34.13 m/s²), and an escape velocity of 68.7 km/s.
In its orbital architecture around TIC 87422071, TIC 87422071 b completes one full revolution every 11.365 Earth days at a semi-major axis of 0.106 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 101.5 km/s (compared to Earth's 29.8 km/s). Its moderate orbital eccentricity of e = 0.124 carries the world between 0.0929 AU at periapsis and 0.1191 AU at apoapsis, driving measurable seasonal insolation cycles.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1110 K (+837°C / +1539°F) and receiving 140.93 S⊕ (~191,799 W/m²), TIC 87422071 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TIC 87422071 is classified as a stellar host with an effective photospheric temperature of 6,150 K, a radius of 1.489 R☉, a mass of 1.239 M☉, an estimated bolometric luminosity of 2.846 L☉. Stellar evolution modeling indicates an estimated stellar age of 3.5 Gyr and a metallicity of [Fe/H] = 0.16 dex (metal-rich relative to the Sun). From Earth, TIC 87422071 shines at apparent V-band magnitude 11.982 (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 87422071 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 6,150 K |
| Stellar Radius | 1.4890 R☉ |
| Stellar Mass | 1.2390 M☉ |
| Bolometric Luminosity | 2.846 L☉ |
| Metallicity [Fe/H] | 0.160 dex |
| Stellar Age | 3.500 Gyr |
| Apparent Magnitude | V: 11.982 · G: 11.612 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.106000 AU |
| Orbital Period | 11.365 days |
| Mean Orbital Velocity | 101.5 km/s |
| Orbital Eccentricity (e) | 0.12400 |
| Orbital Inclination (i) | 87.3200° |
| Mean Bulk Density | 1.76 g/cm³ (68.7 km/s vesc) |
| Insolation Flux | 140.9250 S⊕ (~191,799 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1254.900 LY (384.758 pc) |