KELT-17 is 739 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this A star; the first was found in 2016 by transit (KELT).
Fly there in 3DKELT-17 b goes round its star every 3.08 days, 29 times as often as Mercury goes round the Sun.
| Spectral type | A |
| Surface temperature | 7,454 K |
| Mass | 1.635 solar masses |
| Radius | 1.645 solar radii |
| Luminosity | 7.51 times the Sun |
| Apparent magnitude | 9.234 |
| Age | about 0.65 billion years |
| Distance from the Sun | 738.7 light-years (226.5 parsecs) |
| Position (J2000) | RA 125.6174°, Dec 13.7353° |
| Constellation | Cancer |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| KELT-17 b | 3.08 days | 0.0488 AU | 17.094 R⊕ | 416.36 M⊕ | Transit, 2016 |
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 7,454 K, 7.5 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 2.39 to 4.11 AU (approximate: the star lies just outside the range the formula was fitted to). 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 739 years ago, around 1290.