CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
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Entry no.
1973-0071

COSMOS 551

COSMOS 551 (NORAD 6378) landed on 20 March 1973, after 14 days in orbit.

Official date
NORAD number
6378
International designator
1973-012A
Object type
Spacecraft
Country
USSR
Launched
6 Mar 1973Baikonur Cosmodrome
Landed (UTC)
20 Mar 1973UTC 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

1973-012
1973-0064SL-4 R/B
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Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1973-0071
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