CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1971-0206
OV1-20
OV1-20 (NORAD 5394) re-entered Earth’s atmosphere on 28 August 1971, after 21 days in orbit.
Official date
NORAD number
5394
International designator
1971-067A
Object type
Spacecraft
Country
United States
Launched
7 Aug 1971Vandenberg
Re-entered (UTC)
28 Aug 1971UTC calendar dayAlso recorded as 29 Aug 1971
Time in orbit
21 days21 days
How it ended
Re-entered (natural decay)
Latitude range
88.0°N to 88.0°SFinal inclination 92.0°
Mass
196 kg
Operator
USAF STP
Built by
GD/Convair
Bus
OV1P
Programme
OV1 P
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 92.0°, allowed a re-entry anywhere between 88.0°N and 88.0°S.
Life in orbit
21 daysOV1-20’s lowest and highest points above Earth, week by week, from its tracking history.
From the same launch
1971-067
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1971-0206
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1971-0206
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.