CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1970-0049
OPS 1721
OPS 1721 (NORAD 3915) re-entered Earth’s atmosphere on 16 February 1970, after 9 months in orbit.
Official date
NORAD number
3915
International designator
1969-041B
Object type
Spacecraft
Country
United States
Launched
2 May 1969Vandenberg
Re-entered (UTC)
16 Feb 1970UTC calendar day
Time in orbit
9 months290 days
How it ended
Re-entered (natural decay)
Latitude range
65.7°N to 65.7°SFinal inclination 65.7°
Mass
155 kg
Operator
NRO / SAFSP
Built by
LMSC / ATI
Bus
P-11 H
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 65.7°, allowed a re-entry anywhere between 65.7°N and 65.7°S.
Life in orbit
9 monthsOPS 1721’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 16 Feb 1970
2 entriesFrom the same launch
1969-041
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1970-0049
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1970-0049
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.