CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1981-0454
DELTA 1 R/B(1)
DELTA 1 R/B(1) (NORAD 12473) re-entered Earth’s atmosphere on 8 September 1981, after 3 months in orbit.
Official date
NORAD number
12473
International designator
1981-049B
Object type
Rocket body
Country
United States
Launched
22 May 1981Cape Canaveral
Re-entered (UTC)
8 Sep 1981UTC calendar day
Time in orbit
3 months109 days
How it ended
Re-entered (natural decay)
Latitude range
28.1°N to 28.1°SFinal inclination 28.1°
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 28.1°, allowed a re-entry anywhere between 28.1°N and 28.1°S.
Life in orbit
3 monthsDELTA 1 R/B(1)’s lowest and highest points above Earth, week by week, from its tracking history.
From the same launch
1981-049
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1981-0454
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1981-0454
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.