HD 158259 is 88.2 light-years from the Sun. The NASA Exoplanet Archive lists 5 planets around this G0 star; the first was found in 2020 by radial velocity (Haute-Provence Observatory).
Fly there in 3DHD 158259 b goes round its star every 2.18 days, 40 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 | G0 |
| Surface temperature | 5,802 K |
| Mass | 1.08 solar masses |
| Radius | 1.21 solar radii |
| Luminosity | 1.631 times the Sun |
| Apparent magnitude | 6.47915 |
| Distance from the Sun | 88.2 light-years (27.0 parsecs) |
| Position (J2000) | RA 261.3496°, Dec 52.7905° |
| Constellation | Draco |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| HD 158259 b | 2.18 days | 0.0337 AU from Kepler’s law | 1.2823 R⊕ | 2.22 M⊕ minimum | Radial Velocity, 2020 |
| HD 158259 c | 3.43 days | 0.0457 AU from Kepler’s law | 2.23 R⊕ estimated | 5.6 M⊕ minimum | Radial Velocity, 2020 |
| HD 158259 d | 5.20 days | 0.0602 AU from Kepler’s law | 2.18 R⊕ estimated | 5.41 M⊕ minimum | Radial Velocity, 2020 |
| HD 158259 e | 7.95 days | 0.0800 AU from Kepler’s law | 2.34 R⊕ estimated | 6.08 M⊕ minimum | Radial Velocity, 2020 |
| HD 158259 f | 12.0 days | 0.105 AU from Kepler’s law | 2.35 R⊕ estimated | 6.14 M⊕ minimum | Radial Velocity, 2020 |
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.