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Exoplanet · Tau Ceti

tau Cet h

Orbit0.24 AU
Year49.4 days
Mass≥ 1.83 M⊕
Temperature~473 K (estimated)

It circles Tau Ceti once every 49.4 days, 0.24 AU out: about 1.6 times closer than Mercury is to the Sun.

Found in 2017 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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