Exoplanet · mini-Neptune
TOI-7166 b
TOI-7166 b is a mini-Neptune orbiting the star TOI-7166. Its year lasts 12.9 Earth days. It was discovered in 2025 by the Transit method.
| Host star | TOI-7166 |
|---|---|
| Distance | 115.5 light-years (35.4 pc) |
| Orbital period | 12.9 days |
| Orbital radius | 0.0619 AU |
| Eccentricity | 0.000 |
| Radius | 2.01 R⊕ · 0.179 R♃ |
| Mass | 4.7 M⊕ · 0.0148 M♃ (estimated from the radius) |
| Density | 3.18 g/cm³ |
| Equilibrium temperature | 249 K (-24 °C) |
| Stellar flux received | 1.07 × Earth |
| Discovery method | Transit |
| Discovery year | 2025 |
| Discovered by | Transiting Exoplanet Survey Satellite (TESS) |
Habitable zone
Inside its star's habitable zone: it receives enough light for liquid water to exist on its surface under a suitable atmosphere.
Its star in the sky
In the planet's sky its star is a disc 1.9° across: 3.6 times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 16.04. Visible from the whole Northern Hemisphere and south to latitude 81° S. It stands highest at midnight in August, the best time to observe it.
Light's journey
The light you see tonight set out around the year 1910. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.0 million years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.