K2-343 is 542 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this 3,804 K star; the first was found in 2021 by transit (K2).
Fly there in 3DK2-343 b goes round its star every 2.79 days, 32 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 | 3,804 K |
| Mass | 0.49 solar masses |
| Radius | 0.46 solar radii |
| Luminosity | 0.03643 times the Sun |
| Apparent magnitude | 16.01 |
| Distance from the Sun | 542.0 light-years (166.2 parsecs) |
| Position (J2000) | RA 134.2022°, Dec 21.5027° |
| Constellation | Cancer |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| K2-343 b | 2.79 days | 0.0306 AU from Kepler’s law | 1.65 R⊕ | 3.36 M⊕ estimated | Transit, 2021 |
| K2-343 c | 7.68 days | 0.0600 AU from Kepler’s law | 2.02 R⊕ | 4.74 M⊕ estimated | Transit, 2021 |
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.