TOI-1722 b
Astrophysical Synthesis & Habitability Characterization
TOI-1722 b is a confirmed sub-neptune exoplanet orbiting the star TOI-1722, located approximately 444.9 light-years (136.42 parsecs) from the Solar System. First announced in 2026 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 0.1349% across the stellar disk), this world measures 4.383 Earth radii (0.39 Jupiter radii) and has a measured mass of 17.6 Earth masses. Combining its mass and radius yields a mean bulk density of 1.15 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.92 g⊕ (9.02 m/s²), and an escape velocity of 22.4 km/s.
In its orbital architecture around TOI-1722, TOI-1722 b completes one full revolution every 9.605 Earth days.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 952 K (+679°C / +1254°F) and receiving 136.86 S⊕ (~186,266 W/m²), TOI-1722 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-1722 is classified as a stellar host with an effective photospheric temperature of 6,000 K, a radius of 1.0941 R☉, a mass of 1.162 M☉, an estimated bolometric luminosity of 1.392 L☉. From Earth, TOI-1722 shines at apparent V-band magnitude 10.025 (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-1722 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 6,000 K |
| Stellar Radius | 1.0941 R☉ |
| Stellar Mass | 1.1620 M☉ |
| Bolometric Luminosity | 1.392 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | V: 10.025 · G: 9.910 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 9.605 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 87.8782° |
| Mean Bulk Density | 1.15 g/cm³ (22.4 km/s vesc) |
| Insolation Flux | 136.8600 S⊕ (~186,266 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 444.900 LY (136.419 pc) |