CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1978-0076
DELTA 1 R/B(1)
DELTA 1 R/B(1) (NORAD 10638) re-entered Earth’s atmosphere on 21 February 1978, after 26 days in orbit.
Official date
NORAD number
10638
International designator
1978-012B
Object type
Rocket body
Country
United States
Launched
26 Jan 1978Cape Canaveral
Re-entered (UTC)
21 Feb 1978UTC calendar day
Time in orbit
26 days26 days
How it ended
Re-entered (natural decay)
Latitude range
28.7°N to 28.7°SFinal inclination 28.7°
Mass
845 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 28.7°, allowed a re-entry anywhere between 28.7°N and 28.7°S.
Life in orbit
26 daysDELTA 1 R/B(1)’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 21 Feb 1978
1 entryFrom the same launch
1978-012
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1978-0076
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1978-0076
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.