CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1991-0412
DELTA 1 R/B
DELTA 1 R/B (NORAD 8821) re-entered Earth’s atmosphere on 22 September 1991, after 15 years, 4 months in orbit.
Official date
NORAD number
8821
International designator
1976-039B
Object type
Rocket body
Country
United States
Launched
4 May 1976Vandenberg
Re-entered (UTC)
22 Sep 1991UTC calendar day
Time in orbit
15 years, 4 months5,619 days
How it ended
Re-entered (natural decay)
Latitude range
70.5°N to 70.5°SFinal inclination 109.5°
Mass
718 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 109.5°, allowed a re-entry anywhere between 70.5°N and 70.5°S.
Life in orbit
15 years, 4 monthsDELTA 1 R/B’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 22 Sep 1991
3 entries
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1991-0412
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1991-0412
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.