Exoplanet · Barnard's Star
Barnard b
Orbit0.023 AU
Year3.15 days
Mass≥ 0.3 M⊕
Temperature~438 K (estimated)
It circles Barnard's Star once every 3.15 days, 0.023 AU out: about 17 times closer than Mercury is to the Sun.
Found in 2024 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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