TOI-1937 A b
Astrophysical Synthesis & Habitability Characterization
TOI-1937 A b is a confirmed gas giant exoplanet orbiting the star TOI-1937 A, located approximately 1354 light-years (415.14 parsecs) from the Solar System. First announced in 2023 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 1.4079% across the stellar disk), this world measures 13.978 Earth radii (1.25 Jupiter radii) and has a measured mass of 638.835 Earth masses (2.01 Jupiter masses). Combining its mass and radius yields a mean bulk density of 1.29 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 3.27 g⊕ (32.07 m/s²), and an escape velocity of 75.6 km/s.
In its orbital architecture around TOI-1937 A, TOI-1937 A b completes one full revolution every 0.947 Earth days at a semi-major axis of 0.01932 AU (an ultra-close orbit less than one-seventh of Mercury's 0.387 AU distance from the Sun, where strong stellar tidal forces typically induce synchronous rotation). Its mean orbital velocity is approximately 222 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 2097 K (+1824°C / +3315°F) and receiving 3,230.00 S⊕ (~4,396,030 W/m²), TOI-1937 A b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-1937 A is classified as a stellar host with an effective photospheric temperature of 5,814 K, a radius of 1.08 R☉, a mass of 1.072 M☉, an estimated bolometric luminosity of 1.196 L☉. Stellar evolution modeling indicates an estimated stellar age of 3.6 Gyr and a metallicity of [Fe/H] = 0.196 dex (metal-rich relative to the Sun). From Earth, TOI-1937 A shines at apparent V-band magnitude 13.18 (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-1937 A |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,814 K |
| Stellar Radius | 1.0800 R☉ |
| Stellar Mass | 1.0720 M☉ |
| Bolometric Luminosity | 1.196 L☉ |
| Metallicity [Fe/H] | 0.196 dex |
| Stellar Age | 3.600 Gyr |
| Apparent Magnitude | V: 13.180 · G: 13.017 |
| System Architecture | 2 Stars, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.019320 AU |
| Orbital Period | 0.947 days |
| Mean Orbital Velocity | 222 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 77.0000° |
| Mean Bulk Density | 1.29 g/cm³ (75.6 km/s vesc) |
| Insolation Flux | 3230.0000 S⊕ (~4,396,030 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1354.000 LY (415.135 pc) |