CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1981-0089
OPS 3123
OPS 3123 (NORAD 11850) was deorbited in a controlled re-entry on 6 March 1981, after 8 months in orbit.
Controlled re-entryOfficial date
NORAD number
11850
International designator
1980-052A
Object type
Spacecraft
Country
United States
Launched
18 Jun 1980Vandenberg
Re-entered (UTC)
6 Mar 1981Recorded time 22:30 UTC
Time in orbit
8 months261 days
How it ended
Deorbited (controlled re-entry)
Latitude range
83.7°N to 83.7°SFinal inclination 96.3°
Mass
8,211 kg
Operator
NRO / SAFSP
Built by
LMSC
Bus
KH-9
Programme
Hex III
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 96.3°, allowed a re-entry anywhere between 83.7°N and 83.7°S.
Life in orbit
8 monthsOPS 3123’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 6 Mar 1981
2 entriesFrom the same launch
1980-052
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1981-0089
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1981-0089
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.