CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1975-0077
OPS 8329
OPS 8329 (NORAD 4503) came down while still attached to its host on 26 March 1975, after 4 years, 7 months in orbit.
Official date
NORAD number
4503
International designator
1970-066A
Object type
Spacecraft
Country
United States
Launched
26 Aug 1970Vandenberg
Re-entered (UTC)
26 Mar 1975UTC calendar day
Time in orbit
4 years, 7 months1,673 days
How it ended
Came down attached to its host
Latitude range
74.9°N to 74.9°SFinal inclination 74.9°
Mass
975 kg
Operator
NRO / SAFSP
Built by
LMSC / Cutler-Hammer/AIL
Bus
STRAWMAN
Programme
STRAWMAN
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 74.9°, allowed a re-entry anywhere between 74.9°N and 74.9°S.
Life in orbit
4 years, 7 monthsOPS 8329’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 26 Mar 1975
1 entry
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1975-0077
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1975-0077
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.