TOI-1301.01
Astrophysical Synthesis & Habitability Characterization
TOI-1301.01 is a confirmed sub-neptune exoplanet orbiting the star TOI-1301, located approximately 296.4 light-years (90.87 parsecs) from the Solar System. First announced in 2024 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 0.0962% across the stellar disk), this world measures 2.477 Earth radii and has a measured mass of 6.7 Earth masses. Combining its mass and radius yields a mean bulk density of 2.43 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.09 g⊕ (10.69 m/s²), and an escape velocity of 18.4 km/s.
In its orbital architecture around TOI-1301, TOI-1301.01 completes one full revolution every 6.096 Earth days at a semi-major axis of 0.059866 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 106.8 km/s (compared to Earth's 29.8 km/s).
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 737 K (+464°C / +867°F) and receiving 72.55 S⊕ (~98,741 W/m²), TOI-1301.01 orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-1301 is classified as a stellar host with an effective photospheric temperature of 4,820 K, a radius of 0.732 R☉, a mass of 0.77 M☉, an estimated bolometric luminosity of 0.259 L☉. From Earth, TOI-1301 shines at apparent V-band magnitude 11.337 (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-1301 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 4,820 K |
| Stellar Radius | 0.7320 R☉ |
| Stellar Mass | 0.7700 M☉ |
| Bolometric Luminosity | 0.259 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | V: 11.337 · G: 11.136 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.059866 AU |
| Orbital Period | 6.096 days |
| Mean Orbital Velocity | 106.8 km/s |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 88.1271° |
| Mean Bulk Density | 2.43 g/cm³ (18.4 km/s vesc) |
| Insolation Flux | 72.5500 S⊕ (~98,741 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 296.400 LY (90.869 pc) |