Exoplanet · Earth-sized rocky planet
K2-209 b
K2-209 b is a Earth-sized rocky planet orbiting the star K2-209. Its year lasts 2.08 Earth days. It was discovered in 2018 by the Transit method.
| Host star | K2-209 |
|---|---|
| Distance | 249.5 light-years (76.5 pc) |
| Orbital period | 2.08 days |
| Radius | 0.869 R⊕ · 0.0775 R♃ |
| Mass | 0.586 M⊕ · 0.00184 M♃ (estimated from the radius) |
| Density | 4.92 g/cm³ |
| Discovery method | Transit |
| Discovery year | 2018 |
| Discovered by | K2 |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.30. Visible from the whole Northern Hemisphere and south to latitude 89° S. It stands highest at midnight in October, the best time to observe it.
Light's journey
The light you see tonight set out around the year 1776. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.4 million years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.