TOI-833 b
Astrophysical Synthesis & Habitability Characterization
TOI-833 b is a confirmed super-earth exoplanet orbiting the star TOI-833, located approximately 136.1 light-years (41.72 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 0.0377% across the stellar disk), this world measures 1.27 Earth radii and has a measured mass of 2.15 Earth masses. Combining its mass and radius yields a mean bulk density of 5.79 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.33 g⊕ (13.04 m/s²), and an escape velocity of 14.6 km/s.
In its orbital architecture around TOI-833, TOI-833 b completes one full revolution every 1.042 Earth days at a semi-major axis of 0.0171 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 178.6 km/s (compared to Earth's 29.8 km/s).
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1118 K (+845°C / +1553°F) and receiving 270.07 S⊕ (~367,563 W/m²), TOI-833 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-833 is classified as a stellar host with an effective photospheric temperature of 3,920 K, a radius of 0.6 R☉, a mass of 0.61 M☉, an estimated bolometric luminosity of 0.076 L☉. From Earth, TOI-833 shines at apparent V-band magnitude 11.724 (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-833 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 3,920 K |
| Stellar Radius | 0.6000 R☉ |
| Stellar Mass | 0.6100 M☉ |
| Bolometric Luminosity | 0.076 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | V: 11.724 · G: 11.075 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.017100 AU |
| Orbital Period | 1.042 days |
| Mean Orbital Velocity | 178.6 km/s |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 5.79 g/cm³ (14.6 km/s vesc) |
| Insolation Flux | 270.0682 S⊕ (~367,563 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 136.100 LY (41.715 pc) |