TOI-2886 b
Astrophysical Synthesis & Habitability Characterization
TOI-2886 b is a confirmed gas giant exoplanet orbiting the star TOI-2886, located approximately 1349.2 light-years (413.67 parsecs) from the Solar System. First announced in 2025 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 1.8964% across the stellar disk), this world measures 18.641 Earth radii (1.66 Jupiter radii) and has a measured mass of 444.96 Earth masses (1.4 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.38 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 1.28 g⊕ (12.55 m/s²), and an escape velocity of 54.7 km/s.
In its orbital architecture around TOI-2886, TOI-2886 b completes one full revolution every 1.602 Earth days at a semi-major axis of 0.02871 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 195 km/s (compared to Earth's 29.8 km/s). Its moderate orbital eccentricity of e = 0.11 carries the world between 0.0256 AU at periapsis and 0.0319 AU at apoapsis, driving measurable seasonal insolation cycles.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1978 K (+1705°C / +3101°F) and receiving 2,560.00 S⊕ (~3,484,160 W/m²), TOI-2886 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-2886 is classified as a stellar host with an effective photospheric temperature of 6,240 K, a radius of 1.241 R☉, a mass of 1.229 M☉, an estimated bolometric luminosity of 2.095 L☉. Stellar evolution modeling indicates an estimated stellar age of 1.7 Gyr and a metallicity of [Fe/H] = 0.284 dex (metal-rich relative to the Sun). From Earth, TOI-2886 shines at apparent V-band magnitude 12.265 (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-2886 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 6,240 K |
| Stellar Radius | 1.2410 R☉ |
| Stellar Mass | 1.2290 M☉ |
| Bolometric Luminosity | 2.095 L☉ |
| Metallicity [Fe/H] | 0.284 dex |
| Stellar Age | 1.700 Gyr |
| Apparent Magnitude | V: 12.265 · G: 12.195 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.028710 AU |
| Orbital Period | 1.602 days |
| Mean Orbital Velocity | 195 km/s |
| Orbital Eccentricity (e) | 0.11000 |
| Orbital Inclination (i) | 87.8000° |
| Mean Bulk Density | 0.38 g/cm³ (54.7 km/s vesc) |
| Insolation Flux | 2560.0000 S⊕ (~3,484,160 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1349.200 LY (413.673 pc) |