TOI-4030 b
Astrophysical Synthesis & Habitability Characterization
TOI-4030 b is a confirmed sub-neptune exoplanet orbiting the star TOI-4030, located approximately 1864.4 light-years (571.62 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 0.2921% across the stellar disk), this world measures 5.846 Earth radii (0.52 Jupiter radii) and has a measured mass of 28.8 Earth masses. Combining its mass and radius yields a mean bulk density of 0.79 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.84 g⊕ (8.24 m/s²), and an escape velocity of 24.8 km/s.
In its orbital architecture around TOI-4030, TOI-4030 b completes one full revolution every 2.509 Earth days.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1384 K (+1111°C / +2032°F) and receiving 609.96 S⊕ (~830,157 W/m²), TOI-4030 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-4030 is classified as a stellar host with an effective photospheric temperature of 5,640 K, a radius of 0.9917 R☉, a mass of 0.98 M☉, an estimated bolometric luminosity of 0.893 L☉. From Earth, TOI-4030 shines at apparent V-band magnitude 13.862 (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-4030 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,640 K |
| Stellar Radius | 0.9917 R☉ |
| Stellar Mass | 0.9800 M☉ |
| Bolometric Luminosity | 0.893 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | V: 13.862 · G: 13.711 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 2.509 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 86.8927° |
| Mean Bulk Density | 0.79 g/cm³ (24.8 km/s vesc) |
| Insolation Flux | 609.9610 S⊕ (~830,157 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1864.400 LY (571.615 pc) |