Exoplanet · mini-Neptune
K2-351 b
K2-351 b is a mini-Neptune orbiting the star K2-351. Its year lasts 7.81 Earth days. It was discovered in 2021 by the Transit method.
| Host star | K2-351 |
|---|---|
| Distance | 2,266 light-years (694.7 pc) |
| Orbital period | 7.81 days |
| Radius | 2.54 R⊕ · 0.227 R♃ |
| Mass | 6.99 M⊕ · 0.022 M♃ (estimated from the radius) |
| Density | 2.34 g/cm³ |
| Equilibrium temperature | 934 K (661 °C) |
| Discovery method | Transit |
| Discovery year | 2021 |
| Discovered by | K2 |
In the sky
A telescope is needed to see it: its apparent magnitude is 14.20. Visible from the whole Southern Hemisphere and north to latitude 78° N. South of latitude 78° S it never sets. It stands highest at midnight in April, the best time to observe it.
Light's journey
The light you see tonight set out around 241 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 40 million years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.