K2-201 is 646 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this 5,507 K star; the first was found in 2018 by transit (K2).
Fly there in 3DK2-201 b goes round its star every 25.4 hours, 83 times as often as Mercury goes round the Sun.
Where the archive gives only a period or only an orbit size, the other is worked out from Kepler’s third law with the star’s mass.
| Surface temperature | 5,507 K |
| Mass | 0.956055 solar masses |
| Radius | 0.878161 solar radii |
| Luminosity | 0.5297 times the Sun |
| Apparent magnitude | 12.168 |
| Distance from the Sun | 645.6 light-years (197.9 parsecs) |
| Position (J2000) | RA 293.5607°, Dec -23.1313° |
| Constellation | Sagittarius |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| K2-201 b | 25.4 hours | 0.0200 AU from Kepler’s law | 1.4001 R⊕ | 2.54 M⊕ estimated | Transit, 2018 |
| K2-201 c | 22.8 days | 0.155 AU from Kepler’s law | 3.2857 R⊕ | 10.8 M⊕ estimated | Transit, 2018 |
Values are the NASA Exoplanet Archive’s composite parameters. A radius marked estimated comes from a mass–radius relation; a mass marked minimum is M sin i. Planet sizes and colours in the 3D view are renderings: none of these worlds has been photographed as more than a point of light.