CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1980-0394
COSMOS 631
COSMOS 631 (NORAD 7109) re-entered Earth’s atmosphere on 3 October 1980, after 6 years, 7 months in orbit.
Official date
NORAD number
7109
International designator
1974-005A
Object type
Spacecraft
Country
USSR
Launched
6 Feb 1974Plesetsk Cosmodrome
Re-entered (UTC)
3 Oct 1980UTC calendar day
Time in orbit
6 years, 7 months2,431 days
How it ended
Re-entered (natural decay)
Latitude range
74.0°N to 74.0°SFinal inclination 74.0°
Mass
434 kg
Operator
GRU
Built by
Southern SDB
Bus
Tselina-OM
Programme
Tselina-OM
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 74.0°, allowed a re-entry anywhere between 74.0°N and 74.0°S.
Life in orbit
6 years, 7 monthsCOSMOS 631’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 3 Oct 1980
1 entryFrom the same launch
1974-005
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1980-0394
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1980-0394
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.