TOI-5486 b
Astrophysical Synthesis & Habitability Characterization
TOI-5486 b is a confirmed sub-neptune exoplanet orbiting the star TOI-5486, located approximately 292.5 light-years (89.68 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 0.4324% across the stellar disk), this world measures 3.968 Earth radii (0.35 Jupiter radii) and has a measured mass of 14.9 Earth masses. Combining its mass and radius yields a mean bulk density of 1.32 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.95 g⊕ (9.32 m/s²), and an escape velocity of 21.7 km/s.
In its orbital architecture around TOI-5486, TOI-5486 b completes one full revolution every 2.025 Earth days.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 752 K (+479°C / +894°F) and receiving 53.33 S⊕ (~72,582 W/m²), TOI-5486 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-5486 is classified as a stellar host with an effective photospheric temperature of 3,750 K, a radius of 0.5532 R☉, a mass of 0.5481 M☉, an estimated bolometric luminosity of 0.054 L☉. From Earth, TOI-5486 shines at apparent V-band magnitude 14.297 (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-5486 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 3,750 K |
| Stellar Radius | 0.5532 R☉ |
| Stellar Mass | 0.5481 M☉ |
| Bolometric Luminosity | 0.054 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | V: 14.297 · G: 13.366 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 2.025 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 85.2079° |
| Mean Bulk Density | 1.32 g/cm³ (21.7 km/s vesc) |
| Insolation Flux | 53.3297 S⊕ (~72,582 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 292.500 LY (89.681 pc) |