CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1989-1015
THORAD DELTA 1 R/B(1)
THORAD DELTA 1 R/B(1) (NORAD 7550) re-entered Earth’s atmosphere on 8 December 1989, after 15 years in orbit.
Official date
NORAD number
7550
International designator
1974-094D
Object type
Rocket body
Country
United States
Launched
23 Nov 1974Cape Canaveral
Re-entered (UTC)
8 Dec 1989UTC calendar day
Time in orbit
15 years5,494 days
How it ended
Re-entered (natural decay)
Latitude range
28.2°N to 28.2°SFinal inclination 28.2°
Mass
845 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 28.2°, allowed a re-entry anywhere between 28.2°N and 28.2°S.
Life in orbit
15 yearsTHORAD DELTA 1 R/B(1)’s lowest and highest points above Earth, week by week, from its tracking history.
From the same launch
1974-094
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1989-1015
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1989-1015
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.