Flight
- Date and time (UTC)
- March 3, 1971, 09:30
- Launch designation
- 1971-017
- Mission
- Zenit-4M
- Flight name
- Kosmos-399
- Vehicle flight ID
- 7705712-220
- Year
- Launches in 1971
Orbit and payload
- Initial apogee
- 546 km
- Payload mass to orbit
- 6.0 t
- Payloads
- 1
- GCAT launch code
- OS
Payloads
| Payload | Designation | Owner | Mission type | Mass | Fate |
|---|---|---|---|---|---|
| Kosmos-399 | 1971-017ANORAD 5003 | Main Space Forces Directorate | Optical imaging | 2,200 kg | Landed · Mar 17, 1971 |
Source: GCAT launch list and payload catalogs, Jonathan C. McDowell (CC BY 4.0). Orbit values are the initial orbit reported for the launch.