CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1968-0140
OPS 6874
OPS 6874 (NORAD 2420) re-entered Earth’s atmosphere on 9 May 1968, after 1 year, 7 months in orbit.
Official date
NORAD number
2420
International designator
1966-083B
Object type
Spacecraft
Country
United States
Launched
16 Sep 1966Vandenberg
Re-entered (UTC)
9 May 1968UTC calendar day
Time in orbit
1 year, 7 months601 days
How it ended
Re-entered (natural decay)
Latitude range
86.0°N to 86.0°SFinal inclination 94.0°
Mass
91 kg
Operator
NRO / SAFSP
Built by
LMSC / EDL-Sylvania
Bus
P-11 ML
Programme
EHH B
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 94.0°, allowed a re-entry anywhere between 86.0°N and 86.0°S.
Life in orbit
1 year, 7 monthsOPS 6874’s lowest and highest points above Earth, week by week, from its tracking history.
From the same launch
1966-083
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1968-0140
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1968-0140
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.