Kosmos 307 was operated in an orbit with a perigee of 212 kilometres (132 mi), an apogee of 2,023 kilometres (1,257 mi), 48.4 degrees of inclination, and an orbital period of 107.7 minutes.[1][4] It remained in orbit until it decayed and reentered the atmosphere on 30 December 1970.[4] It was the twenty-sixth of seventy nine DS-P1-Yu satellites to be launched,[1] and the twenty-fourth of seventy two to successfully reach orbit.[5]
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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