TOI-1752 b
Astrophysical Synthesis & Habitability Characterization
TOI-1752 b is a confirmed super-earth exoplanet orbiting the star TOI-1752, located approximately 336 light-years (103.02 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 0.0858% across the stellar disk), this world measures 1.693 Earth radii and has a measured mass of 3.51 Earth masses. Combining its mass and radius yields a mean bulk density of 3.99 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.22 g⊕ (11.96 m/s²), and an escape velocity of 16.1 km/s.
In its orbital architecture around TOI-1752, TOI-1752 b completes one full revolution every 0.935 Earth days at a semi-major axis of 0.01624 AU (an ultra-close orbit less than one-seventh of Mercury's 0.387 AU distance from the Sun, where strong stellar tidal forces typically induce synchronous rotation). Its mean orbital velocity is approximately 188.9 km/s (compared to Earth's 29.8 km/s).
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1036 K (+763°C / +1405°F) and receiving 194.17 S⊕ (~264,269 W/m²), TOI-1752 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-1752 is classified as a low-mass red dwarf of spectral type M1.0±0.5 V with an effective photospheric temperature of 3,762 K, a radius of 0.53 R☉, a mass of 0.524 M☉, an estimated bolometric luminosity of 0.05 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = -0.11 dex (metal-poor relative to the Sun). From Earth, TOI-1752 shines at apparent V-band magnitude 14.62 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere. The TOI-1752 system is a multi-planet architecture hosting 2 confirmed worlds, with TOI-1752 b sharing its stellar neighborhood alongside TOI-1752 c.
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-1752 |
| Spectral Type | M1.0±0.5 V |
| Effective Temp (Teff) | 3,762 K |
| Stellar Radius | 0.5300 R☉ |
| Stellar Mass | 0.5240 M☉ |
| Bolometric Luminosity | 0.05 L☉ |
| Metallicity [Fe/H] | -0.110 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 14.620 · G: 13.817 |
| System Architecture | 1 Star, 2 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.016240 AU |
| Orbital Period | 0.935 days |
| Mean Orbital Velocity | 188.9 km/s |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 86.7500° |
| Mean Bulk Density | 3.99 g/cm³ (16.1 km/s vesc) |
| Insolation Flux | 194.1729 S⊕ (~264,269 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 336.000 LY (103.021 pc) |