CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
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Entry no.
1975-0418

HEOS 1

HEOS 1 (NORAD 3595) re-entered Earth’s atmosphere on 28 October 1975, after 6 years, 10 months in orbit.

Official date
NORAD number
3595
International designator
1968-109A
Object type
Spacecraft
Country
ESRO
Launched
5 Dec 1968Cape Canaveral
Re-entered (UTC)
28 Oct 1975UTC calendar day
Time in orbit
6 years, 10 months2,518 days
How it ended
Re-entered (natural decay)
Latitude range
—
Mass
99 kg
Operator
ESRO
Built by
Junkers
Bus
HEOS
Programme
HEOS

Where it came down

Not on record

No position was recorded for this re-entry. Its final orbit is not on record.

Life in orbit

6 years, 10 months

From the same launch

1968-109
1968-0301DELTA 1 R/B
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Entered in the Orbital Register™, founding volume, September 2026.
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