AstronomyTentative

Comet 21P/Giacobini–Zinner perihelion

expected 2031

expected 2031

—hype

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    Comet 21P/Giacobini–Zinner perihelion is expected 2031. The exact day has not been announced yet.

    Comet 21P/Giacobini–Zinner reaches perihelion, its closest point to the Sun at about 1.01 au, in 2031. The parent of the October Draconids, on a 6.5-year orbit; strong Draconid outbursts follow its returns. The date is an estimate until JPL publishes an orbit solution for this return; courtesy NASA/JPL-Caltech (SBDB).

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    Computed astronomy

    Last verified Sep 10, 2026

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