Exoplanet · mini-Neptune
K2-346 b
K2-346 b is a mini-Neptune orbiting the star K2-346. Its year lasts 26.2 Earth days. It was discovered in 2021 by the Transit method.
| Host star | K2-346 |
|---|---|
| Distance | 344.4 light-years (105.6 pc) |
| Orbital period | 26.2 days |
| Radius | 2.26 R⊕ · 0.202 R♃ |
| Mass | 5.73 M⊕ · 0.018 M♃ (estimated from the radius) |
| Density | 2.73 g/cm³ |
| Equilibrium temperature | 450 K (177 °C) |
| Stellar flux received | 8.81 × Earth |
| Discovery method | Transit |
| Discovery year | 2021 |
| Discovered by | K2 |
Habitable zone
Inside the inner edge of the habitable zone: it receives 8.81 times the light the Earth does, too hot to keep liquid water on its surface.
In the sky
A telescope is needed to see it: its apparent magnitude is 11.90. Visible from the whole Northern Hemisphere and south to latitude 67° S. North of latitude 67° N it never sets. It stands highest at midnight in January, the best time to observe it.
Light's journey
The light you see tonight set out around the year 1682. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 6.1 million years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.