CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1974-0031
DELTA 1 R/B(1)
DELTA 1 R/B(1) (NORAD 6688) re-entered Earth’s atmosphere on 29 January 1974, after 7 months in orbit.
Official date
NORAD number
6688
International designator
1973-039C
Object type
Rocket body
Country
United States
Launched
10 Jun 1973Cape Canaveral
Re-entered (UTC)
29 Jan 1974UTC calendar day
Time in orbit
7 months233 days
How it ended
Re-entered (natural decay)
Latitude range
29.3°N to 29.3°SFinal inclination 29.3°
Mass
784 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 29.3°, allowed a re-entry anywhere between 29.3°N and 29.3°S.
Life in orbit
7 monthsDELTA 1 R/B(1)’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 29 Jan 1974
4 entriesFrom the same launch
1973-039
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1974-0031
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1974-0031
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.