CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1982-0026
OPS 3850
OPS 3850 (NORAD 5285) came down while still attached to its host on 31 January 1982, after 10 years, 7 months in orbit.
Official date
NORAD number
5285
International designator
1971-054A
Object type
Spacecraft
Country
United States
Launched
8 Jun 1971Vandenberg
Re-entered (UTC)
31 Jan 1982UTC calendar day
Time in orbit
10 years, 7 months3,890 days
How it ended
Came down attached to its host
Latitude range
89.8°N to 89.8°SFinal inclination 90.2°
Mass
157 kg
Operator
USAF STP
Built by
Boeing/Kent
Bus
P70-1
Programme
STP1
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 90.2°, allowed a re-entry anywhere between 89.8°N and 89.8°S.
Life in orbit
10 years, 7 monthsOPS 3850’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 31 Jan 1982
1 entry
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1982-0026
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1982-0026
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.