CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1977-0190
DELTA 1 DEB
DELTA 1 DEB (NORAD 9729) re-entered Earth’s atmosphere on 21 April 1977.
Official dateFragment record
NORAD number
9729
International designator
1972-058HV
Object type
Fragment
Country
United States
Parent launched
23 Jul 1972Vandenberg
Re-entered (UTC)
21 Apr 1977UTC calendar day
Time since launch
4 years, 8 months1,733 days
How it ended
Re-entered (natural decay)
Latitude range
81.0°N to 81.0°SFinal inclination 99.0°
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 99.0°, allowed a re-entry anywhere between 81.0°N and 81.0°S.
Life in orbit
DELTA 1 DEB’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 21 Apr 1977
1 entryPart of a fragment group
204 on record
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1977-0190
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1977-0190
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.