CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1977-0313
LES 4
LES 4 (NORAD 1870) re-entered Earth’s atmosphere on 1 August 1977, after 11 years, 7 months in orbit.
Official date
NORAD number
1870
International designator
1965-108B
Object type
Spacecraft
Country
United States
Launched
21 Dec 1965Cape Canaveral
Re-entered (UTC)
1 Aug 1977UTC calendar day
Time in orbit
11 years, 7 months4,241 days
How it ended
Re-entered (natural decay)
Latitude range
—
Mass
52 kg
Operator
USAF SSD
Built by
MIT-LL
Bus
LES
Programme
LES
Where it came down
Not on recordNo position was recorded for this re-entry. Its final orbit is not on record.
Life in orbit
11 years, 7 monthsLES 4’s lowest and highest points above Earth, week by week, from its tracking history.
Also ended on 1 Aug 1977
2 entriesFrom the same launch
1965-108
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1977-0313
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1977-0313
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.