TOI-1710 b
Astrophysical Synthesis & Habitability Characterization
TOI-1710 b is a confirmed sub-neptune exoplanet orbiting the star TOI-1710, located approximately 264.9 light-years (81.23 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 0.2488% across the stellar disk), this world measures 5.06 Earth radii (0.45 Jupiter radii) and has a measured mass of 19.1 Earth masses. Combining its mass and radius yields a mean bulk density of 0.81 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 21.7 km/s.
In its orbital architecture around TOI-1710, TOI-1710 b completes one full revolution every 24.283 Earth days at a semi-major axis of 0.1652 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 74 km/s (compared to Earth's 29.8 km/s). Its moderate orbital eccentricity of e = 0.05 carries the world between 0.1569 AU at periapsis and 0.1735 AU at apoapsis, driving measurable seasonal insolation cycles.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 603 K (+330°C / +626°F) and receiving 33.00 S⊕ (~44,913 W/m²), TOI-1710 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-1710 is classified as a solar-type yellow star of spectral type G5 V with an effective photospheric temperature of 5,775 K, a radius of 0.93 R☉, a mass of 1.02 M☉, an estimated bolometric luminosity of 0.863 L☉. Stellar evolution modeling indicates an estimated stellar age of 1 Gyr and a metallicity of [Fe/H] = 0.04 dex (near-solar heavy-element abundance). From Earth, TOI-1710 shines at apparent V-band magnitude 9.545 (accessible to binoculars and small amateur telescopes) 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-1710 |
| Spectral Type | G5 V |
| Effective Temp (Teff) | 5,775 K |
| Stellar Radius | 0.9300 R☉ |
| Stellar Mass | 1.0200 M☉ |
| Bolometric Luminosity | 0.863 L☉ |
| Metallicity [Fe/H] | 0.040 dex |
| Stellar Age | 1.000 Gyr |
| Apparent Magnitude | V: 9.545 · G: 9.360 |
| System Architecture | 2 Stars, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.165200 AU |
| Orbital Period | 24.283 days |
| Mean Orbital Velocity | 74 km/s |
| Orbital Eccentricity (e) | 0.05000 |
| Orbital Inclination (i) | 90.0100° |
| Mean Bulk Density | 0.81 g/cm³ (21.7 km/s vesc) |
| Insolation Flux | 33.0000 S⊕ (~44,913 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 264.900 LY (81.227 pc) |