CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1970-0239
OPS 6785
OPS 6785 (NORAD 2172) re-entered Earth’s atmosphere on 27 October 1970, after 4 years, 5 months in orbit.
Official date
NORAD number
2172
International designator
1966-039B
Object type
Spacecraft
Country
United States
Launched
14 May 1966Vandenberg
Re-entered (UTC)
27 Oct 1970UTC calendar day
Time in orbit
4 years, 5 months1,627 days
How it ended
Re-entered (natural decay)
Latitude range
70.1°N to 70.1°SFinal inclination 109.9°
Mass
92 kg
Operator
NRO / SAFSP
Built by
LMSC / ATI
Bus
P-11 L
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 109.9°, allowed a re-entry anywhere between 70.1°N and 70.1°S.
Life in orbit
4 years, 5 monthsOPS 6785’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 27 Oct 1970
3 entriesFrom the same launch
1966-039
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1970-0239
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1970-0239
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.