K2-368 is 674 light-years from the Sun. The NASA Exoplanet Archive lists 3 planets around this 4,663 K star; the first was found in 2022 by transit (K2).
Fly there in 3DK2-368 b goes round its star every 5.03 days, 18 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 | 4,663 K |
| Mass | 0.746 solar masses |
| Radius | 0.663 solar radii |
| Luminosity | 0.2028 times the Sun |
| Apparent magnitude | 13.581 |
| Distance from the Sun | 673.9 light-years (206.6 parsecs) |
| Position (J2000) | RA 332.6358°, Dec -11.1661° |
| Constellation | Aquarius |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| K2-368 b | 5.03 days | 0.0521 AU from Kepler’s law | 1.332 R⊕ | 2.34 M⊕ estimated | Transit, 2022 |
| K2-368 c | 9.66 days | 0.0805 AU from Kepler’s law | 1.361 R⊕ | 2.42 M⊕ estimated | Transit, 2022 |
| K2-368 d | 20.2 days | 0.132 AU from Kepler’s law | 1.948 R⊕ | 4.45 M⊕ estimated | Transit, 2022 |
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 4,663 K, 0.20 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.45 to 0.83 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 674 years ago, around 1350.