CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1980-0037
OPS 6239
OPS 6239 (NORAD 7498) re-entered Earth’s atmosphere on 23 January 1980 over North America, after 5 years, 2 months in orbit.
Official date
NORAD number
7498
International designator
1974-085B
Object type
Spacecraft
Country
United States
Launched
29 Oct 1974Vandenberg
Re-entered (UTC)
23 Jan 1980UTC calendar day
Time in orbit
5 years, 2 months1,912 days
How it ended
Re-entered (natural decay)
Latitude range
84.0°N to 84.0°SFinal inclination 96.0°
Mass
210 kg
Operator
NRO / SAFSP
Built by
LMSC / E-Systems
Bus
P-11 CI
Programme
EHH B
Where it came down
Recorded positionRecorded position 73.0°N, 100.0°W. Its final orbit, inclined at 96.0°, allowed a re-entry anywhere between 84.0°N and 84.0°S.
Life in orbit
5 years, 2 monthsOPS 6239’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 23 Jan 1980
1 entryFrom the same launch
1974-085
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1980-0037
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1980-0037
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.