27 март 1969 г. - Mars 1969A

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This Soviet Mars mission was never officially announced but has since been identified as a planned orbiter. After successful operation of the first two stages, the third stage of the Proton SL-12/D-1-e (8K82K, #240-01 + 11S824) launcher experienced a malfunction in a rotor bearing which caused the turbopump to catch fire.

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4 фев 2018

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