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Exoplanet · Gliese 229

GJ 229 b

Orbit1.09 AU
Year1.6 years
Mass≥ 15 M⊕
Temperature~112 K (estimated)

It circles Gliese 229 once every 1.6 years, 1.09 AU out.

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)
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