CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1978-0401
DELTA 1 R/B(1)
DELTA 1 R/B(1) (NORAD 5815) re-entered Earth’s atmosphere on 27 September 1978, after 6 years, 7 months in orbit.
Official date
NORAD number
5815
International designator
1972-005B
Object type
Rocket body
Country
United States
Launched
31 Jan 1972Vandenberg
Re-entered (UTC)
27 Sep 1978UTC calendar day
Time in orbit
6 years, 7 months2,431 days
How it ended
Re-entered (natural decay)
Latitude range
89.7°N to 89.7°SFinal inclination 89.7°
Mass
785 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 89.7°, allowed a re-entry anywhere between 89.7°N and 89.7°S.
Life in orbit
6 years, 7 monthsDELTA 1 R/B(1)’s lowest and highest points above Earth, week by week, from its tracking history.
From the same launch
1972-005
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1978-0401
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1978-0401
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.