Exoplanet · Gliese 876
GJ 876 b
Orbit0.21 AU
Year61.1 days
Mass~723 M⊕
Temperature~191 K (estimated)
It circles Gliese 876 once every 61.1 days, 0.21 AU out: about 1.9 times closer than Mercury is to the Sun.
Found in 1998 by the radial velocity method, which measures the star's wobble. That gives a minimum mass, so it could be heavier.
Sources
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