TOI-2200 b
Astrophysical Synthesis & Habitability Characterization
TOI-2200 b is a confirmed gas giant exoplanet orbiting the star TOI-2200, located approximately 819.5 light-years (251.25 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 0.597% across the stellar disk), this world measures 6.963 Earth radii (0.62 Jupiter radii) and has a measured mass of 38.7 Earth masses (0.12 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.63 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.8 g⊕ (7.85 m/s²), and an escape velocity of 26.4 km/s.
In its orbital architecture around TOI-2200, TOI-2200 b completes one full revolution every 2.936 Earth days.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1147 K (+874°C / +1605°F) and receiving 288.09 S⊕ (~392,086 W/m²), TOI-2200 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-2200 is classified as a stellar host with an effective photospheric temperature of 5,036 K, a radius of 0.8262 R☉, a mass of 0.85 M☉, an estimated bolometric luminosity of 0.394 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = 0.273 dex (metal-rich relative to the Sun). From Earth, TOI-2200 shines at apparent V-band magnitude 13.085 (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 | TOI-2200 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,036 K |
| Stellar Radius | 0.8262 R☉ |
| Stellar Mass | 0.8500 M☉ |
| Bolometric Luminosity | 0.394 L☉ |
| Metallicity [Fe/H] | 0.273 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 13.085 · G: 12.904 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 2.936 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 88.6445° |
| Mean Bulk Density | 0.63 g/cm³ (26.4 km/s vesc) |
| Insolation Flux | 288.0870 S⊕ (~392,086 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 819.500 LY (251.245 pc) |