CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1989-1032
DELTA 1 R/B(2)
DELTA 1 R/B(2) (NORAD 9933) re-entered Earth’s atmosphere on 17 December 1989, after 12 years, 7 months in orbit.
Official date
NORAD number
9933
International designator
1977-029C
Object type
Rocket body
Country
United States
Launched
20 Apr 1977Cape Canaveral
Re-entered (UTC)
17 Dec 1989UTC calendar day
Time in orbit
12 years, 7 months4,624 days
How it ended
Re-entered (natural decay)
Latitude range
25.9°N to 25.9°SFinal inclination 25.9°
Mass
1,123 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 25.9°, allowed a re-entry anywhere between 25.9°N and 25.9°S.
Life in orbit
12 years, 7 monthsDELTA 1 R/B(2)’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 17 Dec 1989
1 entryFrom the same launch
1977-029
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1989-1032
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1989-1032
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.