A third super-Earth discovered orbiting the nearby star HD 176986

30. 1. 2026

A third super-Earth discovered orbiting the nearby star HD 176986

Star system: HD 176986 | Distance from the Sun: 91 light years

Astronomers have discovered a new planet in the HD 176986 planetary system, located about 91 light-years away from our Sun. Using high-precision instruments to filter out stellar activity, researchers identified a third world joining the two previously known super-Earths. 

This new planet, HD 176986 d, orbits its star every 61 days and is nearly seven times more massive than Earth. All three planets in this system are classified as super-Earths or mini-Neptunes, orbiting much closer to their orange-tinted K-type star than Earth does to the Sun. The study also successfully tracked the star's 36-day rotation and its long-term magnetic cycle, providing a clearer picture of this complex multi-planet neighborhood.

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Scientific study

The RoPES project with HARPS and HARPS-N II. A third planet in the multi-planet system HD 176986 external link

Stars mentioned

HD 176986

K2.5V C, Orange star

mass: 0.79 M☉

radius: 0.7 R☉

distance: 91 ly

stars in the system: 1

exoplanets: 3

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