CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1991-0320
DELTA 1 DEB
DELTA 1 DEB (NORAD 21507) re-entered Earth’s atmosphere on 10 August 1991.
Official dateFragment record
NORAD number
21507
International designator
1975-052GC
Object type
Fragment
Country
United States
Parent launched
12 Jun 1975Vandenberg
Re-entered (UTC)
10 Aug 1991UTC calendar day
Time since launch
16 years, 1 month5,903 days
How it ended
Re-entered (natural decay)
Latitude range
80.6°N to 80.6°SFinal inclination 99.4°
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 99.4°, allowed a re-entry anywhere between 80.6°N and 80.6°S.
Life in orbit
DELTA 1 DEB’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 10 Aug 1991
2 entries
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1991-0320
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1991-0320
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.