Alpha Centauri A "S1" (candidate)

A possible giant planet imaged by the James Webb Space Telescope in August 2024. Follow-up images in February and April 2025 did not recover it, so it remains unconfirmed.

If real, it would be a gas giant of roughly 90 to 150 Earth masses in the star's habitable zone; its orbit here is approximate.

Sources

1. Beichman et al. 2025, Worlds Next Door: a candidate giant planet imaged in the habitable zone of α Cen A, ApJL 989:L22
2. NASA Exoplanet Archive, Planetary Systems Composite Parameters (queried 28 Oct 2026)

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