CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1984-0134
OSO 5
OSO 5 (NORAD 3663) re-entered Earth’s atmosphere on 2 April 1984, after 15 years, 2 months in orbit.
Official date
NORAD number
3663
International designator
1969-006A
Object type
Spacecraft
Country
United States
Launched
22 Jan 1969Cape Canaveral
Re-entered (UTC)
2 Apr 1984UTC calendar day
Time in orbit
15 years, 2 months5,549 days
How it ended
Re-entered (natural decay)
Latitude range
32.9°N to 32.9°SFinal inclination 32.9°
Mass
293 kg
Operator
GSFC
Built by
Ball
Bus
OSO
Programme
OSO
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 32.9°, allowed a re-entry anywhere between 32.9°N and 32.9°S.
Life in orbit
15 years, 2 monthsOSO 5’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 2 Apr 1984
1 entryFrom the same launch
1969-006
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1984-0134
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1984-0134
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.