TOI-2654 b
Astrophysical Synthesis & Habitability Characterization
TOI-2654 b is a confirmed gas giant exoplanet orbiting the star TOI-2654, located approximately 812 light-years (248.96 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 0.928% across the stellar disk), this world measures 7.945 Earth radii (0.71 Jupiter radii) and has a measured mass of 48.4 Earth masses (0.15 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.53 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.77 g⊕ (7.55 m/s²), and an escape velocity of 27.6 km/s.
In its orbital architecture around TOI-2654, TOI-2654 b completes one full revolution every 2.968 Earth days.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 819 K (+546°C / +1015°F) and receiving 75.02 S⊕ (~102,098 W/m²), TOI-2654 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-2654 is classified as a stellar host with an effective photospheric temperature of 4,594 K, a radius of 0.7561 R☉, a mass of 0.69 M☉, an estimated bolometric luminosity of 0.228 L☉. From Earth, TOI-2654 shines at apparent V-band magnitude 14.131 (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-2654 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 4,594 K |
| Stellar Radius | 0.7561 R☉ |
| Stellar Mass | 0.6900 M☉ |
| Bolometric Luminosity | 0.228 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | V: 14.131 · G: 13.795 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 2.968 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 87.7926° |
| Mean Bulk Density | 0.53 g/cm³ (27.6 km/s vesc) |
| Insolation Flux | 75.0167 S⊕ (~102,098 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 812.000 LY (248.964 pc) |