K2-166 is 1,555 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this 5,960 K star; the first was found in 2018 by transit (K2).
Fly there in 3DEPIC 201615463 c goes round its star every 3.80 days, 23 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 | 5,960 K |
| Mass | 1.16 solar masses |
| Radius | 1.61 solar radii |
| Luminosity | 2.874 times the Sun |
| Apparent magnitude | 12.081 |
| Distance from the Sun | 1555.4 light-years (476.9 parsecs) |
| Position (J2000) | RA 185.1881°, Dec 2.2824° |
| Constellation | Virgo |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| EPIC 201615463 c | 3.80 days | 0.0501 AU from Kepler’s law | 1.22 R⊕ | 1.98 M⊕ estimated | Transit, 2019 |
| K2-166 b | 8.53 days | 0.0858 AU | 2.19 R⊕ | 5.43 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.