TOI-1054.01
Astrophysical Synthesis & Habitability Characterization
TOI-1054.01 is a confirmed sub-neptune exoplanet orbiting the star TOI-1054, located approximately 288.4 light-years (88.43 parsecs) from the Solar System. First announced in 2021 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 0.0364% across the stellar disk), this world measures 2.434 Earth radii and has a measured mass of 6.5 Earth masses. Combining its mass and radius yields a mean bulk density of 2.49 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.1 g⊕ (10.79 m/s²), and an escape velocity of 18.3 km/s.
In its orbital architecture around TOI-1054, TOI-1054.01 completes one full revolution every 15.508 Earth days.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 853 K (+580°C / +1076°F) and receiving 88.07 S⊕ (~119,866 W/m²), TOI-1054.01 orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-1054 is classified as a stellar host with an effective photospheric temperature of 6,122 K, a radius of 1.17 R☉, a mass of 1.14 M☉, an estimated bolometric luminosity of 1.725 L☉. From Earth, TOI-1054 shines at apparent V-band magnitude 8.95 (accessible to binoculars and small amateur telescopes) 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-1054 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 6,122 K |
| Stellar Radius | 1.1700 R☉ |
| Stellar Mass | 1.1400 M☉ |
| Bolometric Luminosity | 1.725 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | V: 8.950 · G: 8.817 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 15.508 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 2.49 g/cm³ (18.3 km/s vesc) |
| Insolation Flux | 88.0718 S⊕ (~119,866 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 288.400 LY (88.434 pc) |