2026-244Latest orbital launch: Falcon 9 · Starlink Group 15-16 · Oct 27, 2026 · VandenbergLaunch record →
sci-techmaventhe history of spaceflight, in data
sci-techmaven
Launch logAdvertise
  1. Home
  2. Launches
  3. 1973
  4. 1973-011
// orbital launch

Zenit-4MK

Voskhod 11A57 launch from Plesetsk (Soviet Union) on March 1, 1973, carrying 1 payload. GCAT records the launch as a success.

March 1, 1973 · 12:40 UTCLaunch 1973-011Launch no. 1,426 in the log
RocketVoskhod 11A57
SpaceportPlesetskpad LC41/1
OutcomeSuccess
Launch agencyRVSNSoviet Union

Flight

Date and time (UTC)
March 1, 1973, 12:40
Launch designation
1973-011
Mission
Zenit-4MK
Flight name
Kosmos-550
Vehicle flight ID
78033- 730

Orbit and payload

Initial apogee
431 km
Payload mass to orbit
6.0 t
Payloads
1
GCAT launch code
OS

Payloads

PayloadDesignationOwnerMission typeMassFate
Kosmos-5501973-011ANORAD 6376Main Space Forces DirectorateOptical imaging2,310 kgLanded · Mar 11, 1973

Source: GCAT launch list and payload catalogs, Jonathan C. McDowell (CC BY 4.0). Orbit values are the initial orbit reported for the launch.