Kepler-17 is 2,351 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this G2 V star; the first was found in 2011 by transit (Kepler).
Fly there in 3DKepler-17 b goes round its star every 35.7 hours, 59 times as often as Mercury goes round the Sun.
| Spectral type | G2 V |
| Surface temperature | 5,781 K |
| Mass | 1.04 solar masses |
| Radius | 1.01034 solar radii |
| Luminosity | 1.027 times the Sun |
| Apparent magnitude | 14.314 |
| Age | about 1.8 billion years |
| Distance from the Sun | 2350.8 light-years (720.8 parsecs) |
| Position (J2000) | RA 298.3952°, Dec 47.8150° |
| Constellation | Cygnus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| Kepler-17 b | 35.7 hours | 0.0259 AU | 14.68 R⊕ | 778.65 M⊕ | Transit, 2011 |
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 5,781 K, 1.0 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.96 to 1.70 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 2,351 years ago, around 300 BC.