K2-80 is 655 light-years from the Sun. The NASA Exoplanet Archive lists 3 planets around this 5,441 K star; the first was found in 2016 by transit (K2).
Fly there in 3DK2-80 c goes round its star every 5.61 days, 16 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 | 5,441 K |
| Mass | 0.9 solar masses |
| Radius | 0.87 solar radii |
| Luminosity | 0.3695 times the Sun |
| Apparent magnitude | 12.694 |
| Distance from the Sun | 654.9 light-years (200.8 parsecs) |
| Position (J2000) | RA 59.0375°, Dec 13.5590° |
| Constellation | Taurus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| K2-80 d | 28.9 days | 0.178 AU from Kepler’s law | 2.5521 R⊕ | 7.04 M⊕ estimated | Transit, 2018 |
| K2-80 c | 5.61 days | 0.0596 AU | 1.47 R⊕ | 2.76 M⊕ estimated | Transit, 2016 |
| K2-80 b | 19.1 days | 0.135 AU | 2.01 R⊕ | 4.7 M⊕ estimated | Transit, 2016 |
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.