13point8 · The universe, sourcedAll discoveries
Exoplanet · Gliese 687

GJ 687 b

Orbit0.16 AU
Year38.1 days
Mass≥ 17 M⊕
Temperature~264 K (estimated)

It circles Gliese 687 once every 38.1 days, 0.16 AU out: about 2.4 times closer than Mercury is to the Sun.

Found in 2014 by the radial velocity method, which measures the star's wobble. That gives a minimum mass, so it could be heavier.

Sources

  1. NASA Exoplanet Archive, Planetary Systems Composite Parameters (queried 28 Oct 2026)
See it in 3D →

13point8 is an independent educational project. Every fact links to its source; send corrections to [email protected]. Privacy