CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1989-0712
OSO 2
OSO 2 (NORAD 987) re-entered Earth’s atmosphere on 9 August 1989, after 24 years, 6 months in orbit.
Official date
NORAD number
987
International designator
1965-007A
Object type
Spacecraft
Country
United States
Launched
3 Feb 1965Cape Canaveral
Re-entered (UTC)
9 Aug 1989UTC calendar day
Time in orbit
24 years, 6 months8,953 days
How it ended
Re-entered (natural decay)
Latitude range
32.8°N to 32.8°SFinal inclination 32.8°
Mass
236 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 32.8°, allowed a re-entry anywhere between 32.8°N and 32.8°S.
Life in orbit
24 years, 6 monthsOSO 2’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 9 Aug 1989
3 entriesFrom the same launch
1965-007
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1989-0712
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1989-0712
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.