K2-384 is 270 light-years from the Sun. The NASA Exoplanet Archive lists 5 planets around this M4 V star; the first was found in 2022 by transit (K2).
Fly there in 3DK2-384 b goes round its star every 2.23 days, 39 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.
| Spectral type | M4 V |
| Surface temperature | 3,623 K |
| Mass | 0.33 solar masses |
| Radius | 0.348 solar radii |
| Luminosity | 0.01349 times the Sun |
| Apparent magnitude | 16.12 |
| Distance from the Sun | 269.6 light-years (82.7 parsecs) |
| Position (J2000) | RA 20.4998°, Dec 0.7510° |
| Constellation | Cetus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| K2-384 b | 2.23 days | 0.0231 AU from Kepler’s law | 1.076 R⊕ | 1.26 M⊕ estimated | Transit, 2022 |
| K2-384 c | 4.19 days | 0.0352 AU from Kepler’s law | 1.191 R⊕ | 1.82 M⊕ estimated | Transit, 2022 |
| K2-384 d | 6.68 days | 0.0480 AU from Kepler’s law | 1.392 R⊕ | 2.52 M⊕ estimated | Transit, 2022 |
| K2-384 e | 9.72 days | 0.0616 AU from Kepler’s law | 1.345 R⊕ | 2.37 M⊕ estimated | Transit, 2022 |
| K2-384 f | 13.6 days | 0.0772 AU from Kepler’s law | 2.222 R⊕ | 5.57 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 3,623 K, 0.013 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.12 to 0.23 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 270 years ago, around 1760.