In what year was Comet Ikeya–Seki discovered: 1962, 1964, 1965 or 1969?

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Comet Ikeya–Seki (also cataloged as C/1965 S1, 1965 VIII, and 1965f) was a long-period comet spotted independently by two Japanese amateur astronomers, Kaoru Ikeya and Tsutomu Seki, on 18 September 1965.

Learn more on Codexery: Comet Ikeya–Seki in Named Comets

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