Exoplanet · Neptune-like planet
K2-198 b
K2-198 b is a Neptune-like planet orbiting the star K2-198. Its year lasts 17 Earth days. It was discovered in 2018 by the Transit method.
| Host star | K2-198 |
|---|---|
| Distance | 360.6 light-years (110.6 pc) |
| Orbital period | 17 days |
| Radius | 4.19 R⊕ · 0.374 R♃ |
| Mass | 16.3 M⊕ · 0.0513 M♃ (estimated from the radius) |
| Density | 1.22 g/cm³ |
| Equilibrium temperature | 716 K (443 °C) |
| Discovery method | Transit |
| Discovery year | 2018 |
| Discovered by | K2 |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.06. Visible from the whole Southern Hemisphere and north to latitude 84° N. It stands highest at midnight in April, the best time to observe it.
Light's journey
The light you see tonight set out around the year 1665. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 6.4 million years.
Planets in the same system
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.