K2-247 is 842 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this 4,667 K star; the first was found in 2018 by transit (K2).
Fly there in 3DK2-247 b goes round its star every 2.25 days, 39 times as often as Mercury goes round the Sun.
| Surface temperature | 4,667 K |
| Mass | 0.74 solar masses |
| Radius | 0.69 solar radii |
| Luminosity | 0.1314 times the Sun |
| Apparent magnitude | 14.857 |
| Distance from the Sun | 841.9 light-years (258.1 parsecs) |
| Position (J2000) | RA 188.8935°, Dec -10.0693° |
| Constellation | Virgo |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| K2-247 b | 2.25 days | 0.0304 AU | 2.12 R⊕ | 5.14 M⊕ estimated | Transit, 2018 |
| K2-247 c | 6.49 days | 0.0615 AU | 2.19 R⊕ | 5.43 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 4,667 K, 0.13 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.36 to 0.67 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 842 years ago, around 1180.