CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1961-0043
DISCOVERER 31
DISCOVERER 31 (NORAD 186) came down while still attached to its host on 26 October 1961, after 1 month in orbit.
Official date
NORAD number
186
International designator
1961-026A
Object type
Spacecraft
Country
United States
Launched
17 Sep 1961Vandenberg
Re-entered (UTC)
26 Oct 1961UTC calendar day
Time in orbit
1 month39 days
How it ended
Came down attached to its host
Latitude range
82.7°N to 82.7°SFinal inclination 82.7°
Mass
123 kg
Operator
NRO / CIA
Built by
LMSC
Bus
CORONA
Programme
CORONA Early
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 82.7°, allowed a re-entry anywhere between 82.7°N and 82.7°S.
Life in orbit
1 monthDISCOVERER 31’s lowest and highest points above Earth, week by week, from its tracking history.
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1961-0043
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1961-0043
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.