The HD 159868 System
HD 159868 is a planetary system in the constellation Scorpius hosting 2 confirmed exoplanets, about 182 light-years from Earth. One of its planets orbits within the habitable zone, where liquid water could exist on a planetary surface.
HD 159868: Star and Habitable Zone
HD 159868
- Surface temperature
- 5,534 K (Sun: 5,772 K)
- Mass
- 1.19 M☉
- Radius
- 2.13 R☉
Habitable zone of HD 159868: 1.488–3.529 AU (conservative: 1.884–3.346 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
See the full interactive habitable-zone view in the Exoplanet Explorer app ›
All 2 Planets in the HD 159868 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| HD 159868 b HZ | Cold Gas Giant | 1,184 d | — | 0.38 | 2006 |
| HD 159868 c | Cold Gas Giant | 351 d | — | 0.27 | 2012 |
Discovery History
The first planet found here, HD 159868 b, was discovered in 2006 using the radial velocity method. The most recent addition, HD 159868 c, followed in 2012.
- 2006 — HD 159868 b (Radial Velocity)
- 2012 — HD 159868 c (Radial Velocity)
Frequently Asked Questions About HD 159868
How many planets does HD 159868 have?
HD 159868 has 2 confirmed exoplanets. More may await discovery.
Are any planets in the HD 159868 system habitable?
One planet in the system orbits within the habitable zone, where liquid water could exist. Actual habitability depends on atmospheres and composition, which are not yet known.
How far away is HD 159868?
HD 159868 is about 182 light-years from Earth in the constellation Scorpius.
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