TOI-1756 b
Astrophysical Synthesis & Habitability Characterization
TOI-1756 b is a confirmed super-earth exoplanet orbiting the star TOI-1756, located approximately 282.8 light-years (86.72 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 0.1001% across the stellar disk), this world measures 1.942 Earth radii and has a measured mass of 4.43 Earth masses. Combining its mass and radius yields a mean bulk density of 3.34 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.17 g⊕ (11.47 m/s²), and an escape velocity of 16.9 km/s.
In its orbital architecture around TOI-1756, TOI-1756 b completes one full revolution every 2.783 Earth days.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 696 K (+423°C / +793°F) and receiving 55.58 S⊕ (~75,648 W/m²), TOI-1756 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-1756 is classified as a stellar host with an effective photospheric temperature of 3,892 K, a radius of 0.5626 R☉, a mass of 0.5565 M☉, an estimated bolometric luminosity of 0.065 L☉. From Earth, TOI-1756 shines at apparent V-band magnitude 13.88 (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-1756 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 3,892 K |
| Stellar Radius | 0.5626 R☉ |
| Stellar Mass | 0.5565 M☉ |
| Bolometric Luminosity | 0.065 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | V: 13.880 · G: 13.110 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 2.783 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 87.4364° |
| Mean Bulk Density | 3.34 g/cm³ (16.9 km/s vesc) |
| Insolation Flux | 55.5824 S⊕ (~75,648 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 282.800 LY (86.716 pc) |