K2-243 is 870 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this 6,570 K star; the first was found in 2018 by transit (K2).
Fly there in 3DK2-243 b goes round its star every 11.5 days, 8 times as often as Mercury goes round the Sun.
| Surface temperature | 6,570 K |
| Mass | 1.29 solar masses |
| Radius | 1.39 solar radii |
| Luminosity | 2.671 times the Sun |
| Apparent magnitude | 10.971 |
| Distance from the Sun | 870.4 light-years (266.9 parsecs) |
| Position (J2000) | RA 181.1211°, Dec -4.8991° |
| Constellation | Virgo |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| K2-243 b | 11.5 days | 0.109 AU | 2.17 R⊕ | 5.35 M⊕ estimated | Transit, 2018 |
| K2-243 c | 24.9 days | 0.182 AU | 2.01 R⊕ | 4.7 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.
For a star of 6,570 K, 2.7 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 1.48 to 2.57 AU. None of its known planets orbits inside it. The zone says how much starlight arrives, not whether a planet has water or air. The edges follow Kopparapu et al. (2014), as the 3D view draws them.
The light you see left 870 years ago, around 1160.