TIC 9344899 b
Astrophysical Synthesis & Habitability Characterization
TIC 9344899 b is a confirmed gas giant exoplanet orbiting the star TIC 9344899, located approximately 1735.9 light-years (532.23 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 0.6277% across the stellar disk), this world measures 9.16 Earth radii (0.82 Jupiter radii) and has a measured mass of 6170 Earth masses (19.41 Jupiter masses). Combining its mass and radius yields a mean bulk density of 44.27 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 73.54 g⊕ (721.18 m/s²), and an escape velocity of 290.3 km/s.
In its orbital architecture around TIC 9344899, TIC 9344899 b completes one full revolution every 8.582 Earth days at a semi-major axis of 0.0815 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 103.3 km/s (compared to Earth's 29.8 km/s). With a near-circular eccentricity of e = 0.029 (ranging from 0.0791 AU at periapsis to 0.0839 AU at apoapsis), the planet experiences minimal orbital distance variation.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 923 K (+650°C / +1202°F) and receiving 149.86 S⊕ (~203,961 W/m²), TIC 9344899 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TIC 9344899 is classified as a solar-type yellow star of spectral type G3 V with an effective photospheric temperature of 5,800 K, a radius of 1.06 R☉, a mass of 0.98 M☉, an estimated bolometric luminosity of 1.141 L☉. Stellar evolution modeling indicates an estimated stellar age of 6.1 Gyr and a metallicity of [Fe/H] = 0.07 dex (metal-rich relative to the Sun). From Earth, TIC 9344899 shines at apparent V-band magnitude 13.291 (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 9344899 |
| Spectral Type | G3 V |
| Effective Temp (Teff) | 5,800 K |
| Stellar Radius | 1.0600 R☉ |
| Stellar Mass | 0.9800 M☉ |
| Bolometric Luminosity | 1.141 L☉ |
| Metallicity [Fe/H] | 0.070 dex |
| Stellar Age | 6.100 Gyr |
| Apparent Magnitude | V: 13.291 · G: 13.186 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.081500 AU |
| Orbital Period | 8.582 days |
| Mean Orbital Velocity | 103.3 km/s |
| Orbital Eccentricity (e) | 0.02900 |
| Orbital Inclination (i) | 88.9500° |
| Mean Bulk Density | 44.27 g/cm³ (290.3 km/s vesc) |
| Insolation Flux | 149.8610 S⊕ (~203,961 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1735.900 LY (532.228 pc) |