TOI-4137 b
Astrophysical Synthesis & Habitability Characterization
TOI-4137 b is a confirmed gas giant exoplanet orbiting the star TOI-4137, located approximately 1092.6 light-years (334.99 parsecs) from the Solar System. First announced in 2022 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 0.7489% across the stellar disk), this world measures 13.574 Earth radii (1.21 Jupiter radii) and has a measured mass of 457.673 Earth masses (1.44 Jupiter masses). Combining its mass and radius yields a mean bulk density of 1.01 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 2.48 g⊕ (24.32 m/s²), and an escape velocity of 65 km/s.
In its orbital architecture around TOI-4137, TOI-4137 b completes one full revolution every 3.802 Earth days at a semi-major axis of 0.05222 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 149.4 km/s (compared to Earth's 29.8 km/s). The orbit is modeled as circular (e = 0.00), maintaining a constant stellar distance throughout its year.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1570 K (+1297°C / +2367°F) and receiving 1,013.00 S⊕ (~1,378,693 W/m²), TOI-4137 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-4137 is classified as a stellar host with an effective photospheric temperature of 6,202 K, a radius of 1.438 R☉, a mass of 1.313 M☉, an estimated bolometric luminosity of 2.745 L☉. Stellar evolution modeling indicates an estimated stellar age of 2.1 Gyr and a metallicity of [Fe/H] = 0.182 dex (metal-rich relative to the Sun). From Earth, TOI-4137 shines at apparent V-band magnitude 11.31 (faint and requiring research-grade or CCD telescopic photometry) in the Northern 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-4137 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 6,202 K |
| Stellar Radius | 1.4380 R☉ |
| Stellar Mass | 1.3130 M☉ |
| Bolometric Luminosity | 2.745 L☉ |
| Metallicity [Fe/H] | 0.182 dex |
| Stellar Age | 2.100 Gyr |
| Apparent Magnitude | V: 11.310 · G: 11.247 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.052220 AU |
| Orbital Period | 3.802 days |
| Mean Orbital Velocity | 149.4 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 85.7000° |
| Mean Bulk Density | 1.01 g/cm³ (65 km/s vesc) |
| Insolation Flux | 1013.0000 S⊕ (~1,378,693 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1092.600 LY (334.993 pc) |