CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1989-0644
THORAD DELTA 1 DEB
THORAD DELTA 1 DEB (NORAD 18901) re-entered Earth’s atmosphere on 11 July 1989.
Official dateFragment record
NORAD number
18901
International designator
1974-089FB
Object type
Fragment
Country
United States
Parent launched
15 Nov 1974Vandenberg
Re-entered (UTC)
11 Jul 1989UTC calendar day
Time since launch
14 years, 7 months5,352 days
How it ended
Re-entered (natural decay)
Latitude range
77.1°N to 77.1°SFinal inclination 102.9°
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 102.9°, allowed a re-entry anywhere between 77.1°N and 77.1°S.
Life in orbit
THORAD DELTA 1 DEB’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 11 Jul 1989
2 entries
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1989-0644
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1989-0644
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.