CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Orbital Register seal
Entry no.
1971-0054

COSMOS 399

COSMOS 399 (NORAD 5003) landed on 17 March 1971, after 14 days in orbit.

Official date
NORAD number
5003
International designator
1971-017A
Object type
Spacecraft
Country
USSR
Launched
3 Mar 1971Baikonur Cosmodrome
Landed (UTC)
17 Mar 1971UTC calendar day
Time in orbit
14 days14 days
How it ended
Landed
Latitude range
65.0°N to 65.0°SFinal inclination 65.0°
Mass
2,200 kg
Operator
GUKOS RVSN
Built by
TsKBEM Fil. 3
Bus
Zenit-4M
Programme
Zenit-4M

Where it came down

Latitude band its orbit allowed
Exact position not recorded

No position was recorded for this re-entry. Its final orbit, inclined at 65.0°, allowed a re-entry anywhere between 65.0°N and 65.0°S.

Life in orbit

14 days

From the same launch

1971-017
1971-0050SL-4 R/B
Orbital Register seal
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1971-0054
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.