HAT-P-17 is 301 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this K star; the first was found in 2012 by transit (HATNet).
Fly there in 3DHAT-P-17 b goes round its star every 10.3 days, 9 times as often as Mercury goes round the Sun.
| Spectral type | K |
| Surface temperature | 5,246 K |
| Mass | 0.99 solar masses |
| Radius | 0.87 solar radii |
| Luminosity | 0.5141 times the Sun |
| Apparent magnitude | 10.375 |
| Age | about 7 billion years |
| Distance from the Sun | 301.3 light-years (92.4 parsecs) |
| Position (J2000) | RA 324.5360°, Dec 30.4882° |
| Constellation | Cygnus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| HAT-P-17 b | 10.3 days | 0.0892 AU | 11.769 R⊕ | 184.34 M⊕ | Transit, 2012 |
| HAT-P-17 c | 15.3 years | 5.600 AU | 13.1 R⊕ estimated | 1080.6 M⊕ minimum | Radial Velocity, 2012 |
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 5,246 K, 0.51 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.70 to 1.26 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 301 years ago, around 1720.