K2-16 is 1,093 light-years from the Sun. The NASA Exoplanet Archive lists 3 planets around this K3 V star; the first was found in 2015 by transit (K2).
Fly there in 3DEPIC 201754305 d goes round its star every 2.72 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.
| Spectral type | K3 V |
| Surface temperature | 4,742 K |
| Mass | 0.68 solar masses |
| Radius | 0.66 solar radii |
| Luminosity | 0.1735 times the Sun |
| Apparent magnitude | 14.668 |
| Distance from the Sun | 1092.5 light-years (335.0 parsecs) |
| Position (J2000) | RA 175.0972°, Dec 4.5574° |
| Constellation | Virgo |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| EPIC 201754305 d | 2.72 days | 0.0335 AU from Kepler’s law | 1.03 R⊕ | 1.08 M⊕ estimated | Transit, 2019 |
| K2-16 b | 7.62 days | 0.0667 AU | 2.02 R⊕ | 4.74 M⊕ estimated | Transit, 2015 |
| K2-16 c | 19.1 days | 0.123 AU | 2.54 R⊕ | 6.99 M⊕ estimated | Transit, 2015 |
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 4,742 K, 0.17 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.42 to 0.76 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 1,093 years ago, around AD 930.