Kosmos 351 was the thirty-fourth of seventy nine DS-P1-Yu satellites to be launched,[1] and the thirty-first of seventy two to successfully reach orbit.[5] It was operated in an orbit with a perigee of 261 kilometres (162 mi), an apogee of 429 kilometres (267 mi), 70.9 degrees of inclination, and an orbital period of 91.43 minutes.[1][6] It remained in orbit until it decayed and reentered the atmosphere on 13 October 1970.[6]
Payloads are separated by bullets ( · ), launches by pipes ( | ). Crewed flights are indicated in underline. Uncatalogued launch failures are listed in italics. Payloads deployed from other spacecraft are denoted in (brackets).
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