TOI-2719 b
Astrophysical Synthesis & Habitability Characterization
TOI-2719 b is a confirmed sub-neptune exoplanet orbiting the star TOI-2719, located approximately 1919 light-years (588.37 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 0.1052% across the stellar disk), this world measures 5.98 Earth radii (0.53 Jupiter radii) and has a measured mass of 29.9 Earth masses. Combining its mass and radius yields a mean bulk density of 0.77 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.84 g⊕ (8.24 m/s²), and an escape velocity of 25 km/s.
In its orbital architecture around TOI-2719, TOI-2719 b completes one full revolution every 3.376 Earth days.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1710 K (+1437°C / +2619°F) and receiving 874.29 S⊕ (~1,189,909 W/m²), TOI-2719 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-2719 is classified as a stellar host with an effective photospheric temperature of 5,762 K, a radius of 1.69 R☉, a mass of 1.02 M☉, an estimated bolometric luminosity of 2.825 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = 0.27 dex (metal-rich relative to the Sun). From Earth, TOI-2719 shines at apparent V-band magnitude 12.684 (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-2719 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,762 K |
| Stellar Radius | 1.6900 R☉ |
| Stellar Mass | 1.0200 M☉ |
| Bolometric Luminosity | 2.825 L☉ |
| Metallicity [Fe/H] | 0.270 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 12.684 · G: 12.531 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 3.376 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 83.0700° |
| Mean Bulk Density | 0.77 g/cm³ (25 km/s vesc) |
| Insolation Flux | 874.2900 S⊕ (~1,189,909 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1919.000 LY (588.368 pc) |