CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1991-0536
DELTA 1 DEB
DELTA 1 DEB (NORAD 21672) re-entered Earth’s atmosphere on 11 December 1991.
Official dateFragment record
NORAD number
21672
International designator
1975-052HY
Object type
Fragment
Country
United States
Parent launched
12 Jun 1975Vandenberg
Re-entered (UTC)
11 Dec 1991UTC calendar dayAlso recorded as 24 Dec 1991
Time since launch
16 years, 5 months6,026 days
How it ended
Re-entered (natural decay)
Latitude range
81.5°N to 81.5°SFinal inclination 98.5°
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 98.5°, allowed a re-entry anywhere between 81.5°N and 81.5°S.
Life in orbit
DELTA 1 DEB’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 11 Dec 1991
1 entry
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1991-0536
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1991-0536
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.