TOI-4914 b
Astrophysical Synthesis & Habitability Characterization
TOI-4914 b is a confirmed gas giant exoplanet orbiting the star TOI-4914, located approximately 978.1 light-years (299.89 parsecs) from the Solar System. First announced in 2024 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 1.3922% across the stellar disk), this world measures 12.87 Earth radii (1.15 Jupiter radii) and has a measured mass of 227 Earth masses (0.71 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.59 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 1.37 g⊕ (13.44 m/s²), and an escape velocity of 47 km/s.
In its orbital architecture around TOI-4914, TOI-4914 b completes one full revolution every 10.601 Earth days at a semi-major axis of 0.098 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 100.6 km/s (compared to Earth's 29.8 km/s). The planet follows a highly eccentric trajectory (e = 0.408, swinging from 0.058 AU at periapsis out to 0.138 AU at apoapsis), pointing to past dynamical scattering or secular gravitational perturbations.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 894 K (+621°C / +1150°F) and receiving 18.11 S⊕ (~24,645 W/m²), TOI-4914 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-4914 is classified as a stellar host with an effective photospheric temperature of 5,805 K, a radius of 1 R☉, a mass of 1.03 M☉, an estimated bolometric luminosity of 1.019 L☉. Stellar evolution modeling indicates an estimated stellar age of 5.3 Gyr and a metallicity of [Fe/H] = -0.13 dex (metal-poor relative to the Sun). From Earth, TOI-4914 shines at apparent V-band magnitude 12.235 (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-4914 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,805 K |
| Stellar Radius | 1.0000 R☉ |
| Stellar Mass | 1.0300 M☉ |
| Bolometric Luminosity | 1.019 L☉ |
| Metallicity [Fe/H] | -0.130 dex |
| Stellar Age | 5.300 Gyr |
| Apparent Magnitude | V: 12.235 · G: 12.100 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.098000 AU |
| Orbital Period | 10.601 days |
| Mean Orbital Velocity | 100.6 km/s |
| Orbital Eccentricity (e) | 0.40800 |
| Orbital Inclination (i) | 86.3500° |
| Mean Bulk Density | 0.59 g/cm³ (47 km/s vesc) |
| Insolation Flux | 18.1082 S⊕ (~24,645 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 978.100 LY (299.890 pc) |