HD 159243 is 239 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this G0 V star; the first was found in 2013 by radial velocity (Haute-Provence Observatory).
Fly there in 3DHD 159243 b goes round its star every 12.6 days, 7 times as often as Mercury goes round the Sun.
| Spectral type | G0 V |
| Surface temperature | 6,123 K |
| Mass | 1.125 solar masses |
| Radius | 1.12 solar radii |
| Luminosity | 1.3 times the Sun |
| Apparent magnitude | 8.65 |
| Age | about 1.25 billion years |
| Distance from the Sun | 239.1 light-years (73.3 parsecs) |
| Position (J2000) | RA 263.3395°, Dec 5.7008° |
| Constellation | Ophiuchus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| HD 159243 b | 12.6 days | 0.110 AU | 13.7 R⊕ estimated | 359.13 M⊕ minimum | Radial Velocity, 2013 |
| HD 159243 c | 248.4 days | 0.800 AU | 13.4 R⊕ estimated | 603.9 M⊕ minimum | Radial Velocity, 2013 |
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 6,123 K, 1.3 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 1.06 to 1.86 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 239 years ago, around 1790.