Kosmos 520 (US-K #1), the first Soviet Oko missile early-warning satellite on a highly elliptical Molniya-type orbit. Molniya-M (Blok-2BL) from Plesetsk Site 41/1 opened the space-based ballistic-missile launch detection constellation.
- Outcome
- Success
- Orbit
- Elliptical
- Elliptical orbit
- Payload to orbit
- 1.6 T (est.)
- Flight
- 37th
- of 272 Molniya-M 2BL flights
- Date and time
- 19 September 1972, 19:19 UTC
- Rocket
- Molniya-M 2BL
- Builder
- Progress RSC
- Launch site
- 41/1, Plesetsk Cosmodrome, Russian Federation
- Payload
- Government/Top Secret
- International designator
- 1972-072
- Launches in 1972
- 77th of 113
See it in orbit
Space Atlas shows the satellites and rocket stages from this launch in 3D.
View satellites in Space Atlas