TOI-1075 b
Astrophysical Synthesis & Habitability Characterization
TOI-1075 b is a confirmed super-earth exoplanet orbiting the star TOI-1075, located approximately 200.5 light-years (61.46 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 0.0799% across the stellar disk), this world measures 1.791 Earth radii and has a measured mass of 9.95 Earth masses. Combining its mass and radius yields a mean bulk density of 9.55 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 3.1 g⊕ (30.4 m/s²), and an escape velocity of 26.4 km/s.
In its orbital architecture around TOI-1075, TOI-1075 b completes one full revolution every 0.605 Earth days at a semi-major axis of 0.01159 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 208.5 km/s (compared to Earth's 29.8 km/s). The orbit is modeled as circular (e = 0.00), maintaining a constant stellar distance throughout its year.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1323 K (+1050°C / +1922°F) and receiving 509.20 S⊕ (~693,021 W/m²), TOI-1075 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-1075 is classified as an orange K-type star of spectral type K9 V/M0 V with an effective photospheric temperature of 3,875 K, a radius of 0.581 R☉, a mass of 0.604 M☉, an estimated bolometric luminosity of 0.068 L☉. Stellar evolution modeling indicates an estimated stellar age of 6 Gyr and a metallicity of [Fe/H] = -0.08 dex (near-solar heavy-element abundance). From Earth, TOI-1075 shines at apparent V-band magnitude 12.615 (faint and requiring research-grade or CCD telescopic photometry) 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-1075 |
| Spectral Type | K9 V/M0 V |
| Effective Temp (Teff) | 3,875 K |
| Stellar Radius | 0.5810 R☉ |
| Stellar Mass | 0.6040 M☉ |
| Bolometric Luminosity | 0.068 L☉ |
| Metallicity [Fe/H] | -0.080 dex |
| Stellar Age | 6.000 Gyr |
| Apparent Magnitude | V: 12.615 · G: 12.054 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.011590 AU |
| Orbital Period | 0.605 days |
| Mean Orbital Velocity | 208.5 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 84.6700° |
| Mean Bulk Density | 9.55 g/cm³ (26.4 km/s vesc) |
| Insolation Flux | 509.2000 S⊕ (~693,021 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 200.500 LY (61.459 pc) |