CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1980-0225
THOR AGENA D R/B
THOR AGENA D R/B (NORAD 3987) re-entered Earth’s atmosphere on 12 June 1980, after 11 years in orbit.
Official date
NORAD number
3987
International designator
1969-051B
Object type
Rocket body
Country
United States
Launched
5 Jun 1969Vandenberg
Re-entered (UTC)
12 Jun 1980UTC calendar day
Time in orbit
11 years4,025 days
How it ended
Re-entered (natural decay)
Latitude range
81.9°N to 81.9°SFinal inclination 81.9°
Mass
600 kg
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 81.9°, allowed a re-entry anywhere between 81.9°N and 81.9°S.
Life in orbit
11 yearsTHOR AGENA D R/B’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 12 Jun 1980
1 entryFrom the same launch
1969-051
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1980-0225
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1980-0225
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.