CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1965-0350
COSMOS 51
COSMOS 51 (NORAD 947) re-entered Earth’s atmosphere on 14 November 1965, after 11 months in orbit.
Official date
NORAD number
947
International designator
1964-080A
Object type
Spacecraft
Country
USSR
Launched
9 Dec 1964Kapustin Yar
Re-entered (UTC)
14 Nov 1965UTC calendar day
Time in orbit
11 months340 days
How it ended
Re-entered (natural decay)
Latitude range
48.7°N to 48.7°SFinal inclination 48.7°
Mass
247 kg
Operator
OKB-586
Built by
OKB-586
Bus
DS
Programme
DS-MT
Where it came down
Latitude band its orbit allowedExact position not recorded
No position was recorded for this re-entry. Its final orbit, inclined at 48.7°, allowed a re-entry anywhere between 48.7°N and 48.7°S.
Life in orbit
11 monthsCOSMOS 51’s lowest and highest points above Earth, week by week, from its tracking history.
From the same launch
1964-080
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1965-0350
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1965-0350
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.