CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1977-0512
DELTA 1 R/B(1)
DELTA 1 R/B(1) (NORAD 9866) re-entered Earth’s atmosphere on 17 December 1977, after 9 months in orbit.
Official date
NORAD number
9866
International designator
1977-018C
Object type
Rocket body
Country
United States
Launched
10 Mar 1977Cape Canaveral
Re-entered (UTC)
17 Dec 1977UTC calendar day
Time in orbit
9 months282 days
How it ended
Re-entered (natural decay)
Latitude range
—
Mass
845 kg
Where it came down
Not on recordNo position was recorded for this re-entry. Its final orbit is not on record.
Life in orbit
9 monthsDELTA 1 R/B(1)’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 17 Dec 1977
1 entryFrom the same launch
1977-018
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1977-0512
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1977-0512
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.