K2-117 is 331 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this M1.0 V star; the first was found in 2017 by transit (K2).
Fly there in 3DK2-117 b goes round its star every 31.0 hours, 68 times as often as Mercury goes round the Sun.
| Spectral type | M1.0 V |
| Surface temperature | 3,778 K |
| Mass | 0.54 solar masses |
| Radius | 0.51 solar radii |
| Luminosity | 0.044 times the Sun |
| Apparent magnitude | 14.639 |
| Distance from the Sun | 331.5 light-years (101.6 parsecs) |
| Position (J2000) | RA 133.8557°, Dec 10.4692° |
| Constellation | Cancer |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| K2-117 b | 31.0 hours | 0.0189 AU | 2.03 R⊕ | 4.78 M⊕ estimated | Transit, 2017 |
| K2-117 c | 5.44 days | 0.0492 AU | 2.06 R⊕ | 4.9 M⊕ estimated | Transit, 2017 |
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.