Kosmos 320 was placed into a low Earth orbit with a perigee of 247 kilometres (153mi), an apogee of 326 kilometres (203mi), 48.4 degrees of inclination, and an orbital period of 90.2 minutes.[1] It decayed from orbit on 10 February 1970.[4] Kosmos 320 was the second of two DS-MO satellites to be launched. It was preceded by Kosmos 149, which was launched in March 1967.[1][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).