TOI-5795 b
Astrophysical Synthesis & Habitability Characterization
TOI-5795 b is a confirmed sub-neptune exoplanet orbiting the star TOI-5795, located approximately 510.5 light-years (156.53 parsecs) from the Solar System. First announced in 2025 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 0.2268% across the stellar disk), this world measures 5.62 Earth radii (0.5 Jupiter radii) and has a measured mass of 23.66 Earth masses. Combining its mass and radius yields a mean bulk density of 0.73 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.75 g⊕ (7.35 m/s²), and an escape velocity of 23 km/s.
In its orbital architecture around TOI-5795, TOI-5795 b completes one full revolution every 6.141 Earth days at a semi-major axis of 0.064 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 113.4 km/s (compared to Earth's 29.8 km/s). The planet follows a highly eccentric trajectory (e = 0.25, swinging from 0.048 AU at periapsis out to 0.08 AU at apoapsis), pointing to past dynamical scattering or secular gravitational perturbations.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1137 K (+864°C / +1587°F) and receiving 240.68 S⊕ (~327,560 W/m²), TOI-5795 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-5795 is classified as a solar-type yellow star of spectral type G3 V with an effective photospheric temperature of 5,715 K, a radius of 1.082 R☉, a mass of 0.901 M☉, an estimated bolometric luminosity of 1.12 L☉. Stellar evolution modeling indicates an estimated stellar age of 10.2 Gyr and a metallicity of [Fe/H] = -0.27 dex (metal-poor relative to the Sun). From Earth, TOI-5795 shines at apparent V-band magnitude 10.708 (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-5795 |
| Spectral Type | G3 V |
| Effective Temp (Teff) | 5,715 K |
| Stellar Radius | 1.0820 R☉ |
| Stellar Mass | 0.9010 M☉ |
| Bolometric Luminosity | 1.12 L☉ |
| Metallicity [Fe/H] | -0.270 dex |
| Stellar Age | 10.200 Gyr |
| Apparent Magnitude | V: 10.708 · G: 10.638 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.064000 AU |
| Orbital Period | 6.141 days |
| Mean Orbital Velocity | 113.4 km/s |
| Orbital Eccentricity (e) | 0.25000 |
| Orbital Inclination (i) | 88.5400° |
| Mean Bulk Density | 0.73 g/cm³ (23 km/s vesc) |
| Insolation Flux | 240.6761 S⊕ (~327,560 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 510.500 LY (156.530 pc) |