TOI-2048 b
Astrophysical Synthesis & Habitability Characterization
TOI-2048 b is a confirmed sub-neptune exoplanet orbiting the star TOI-2048, located approximately 380.2 light-years (116.57 parsecs) from the Solar System. First announced in 2022 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 0.0917% across the stellar disk), this world measures 2.61 Earth radii and has a measured mass of 7.32 Earth masses. Combining its mass and radius yields a mean bulk density of 2.27 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.07 g⊕ (10.49 m/s²), and an escape velocity of 18.7 km/s.
In its orbital architecture around TOI-2048, TOI-2048 b completes one full revolution every 13.79 Earth days. Its moderate orbital eccentricity of e = 0.13 driving measurable seasonal insolation cycles.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 646 K (+373°C / +703°F) and receiving 29.04 S⊕ (~39,517 W/m²), TOI-2048 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-2048 is classified as a solar-type yellow star of spectral type G V with an effective photospheric temperature of 5,185 K, a radius of 0.79 R☉, a mass of 0.83 M☉, an estimated bolometric luminosity of 0.405 L☉. Stellar evolution modeling indicates an estimated stellar age of 0.3 Gyr and a metallicity of [Fe/H] = 0.02 dex (near-solar heavy-element abundance). From Earth, TOI-2048 shines at apparent V-band magnitude 11.431 (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-2048 |
| Spectral Type | G V |
| Effective Temp (Teff) | 5,185 K |
| Stellar Radius | 0.7900 R☉ |
| Stellar Mass | 0.8300 M☉ |
| Bolometric Luminosity | 0.405 L☉ |
| Metallicity [Fe/H] | 0.020 dex |
| Stellar Age | 0.300 Gyr |
| Apparent Magnitude | V: 11.431 · G: 11.325 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 13.79 days |
| Orbital Eccentricity (e) | 0.13000 |
| Orbital Inclination (i) | 89.4100° |
| Mean Bulk Density | 2.27 g/cm³ (18.7 km/s vesc) |
| Insolation Flux | 29.0350 S⊕ (~39,517 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 380.200 LY (116.567 pc) |