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// space science · 1968

HEOS 1

HEOS 1 was launched on December 5, 1968 aboard a Thor Delta E1 from Cape Canaveral & Kennedy. Latest status in GCAT: left Earth orbit for deep space (Dec 6, 1968).

COSPAR 1968-109ANORAD 3595European Space Research Organisation

Identity

Name in GCAT
HEOS 1
Payload designation
HEOS A1
International designator
1968-109A
NORAD catalog number
3595
GCAT identifier
S03595
UN registration
A/AC.105/INF.201

Mission

Mission type
Space science
Use
Civil government
Program
HEOS
Owner
ESRO
Country
European Space Research Organisation
Builder
Junkers Flugzeug- und Motorenwerke GmBH
Platform (bus)
HEOS

Launch

Date
December 5, 1968 · 18:55 UTC
Launch record
1968-109Success
Spaceport
Cape Canaveral & Kennedy · pad LC17B

Orbit and fate

Orbit class (GCAT)
DSO
Perigee
12,244 km
Apogee
210,550 km
Inclination
52.62°
Status
Left Earth orbit for deep space
Status date
December 6, 1968
Last known active
Oct 28, 1975
End of operations
Oct 28, 1975

Size

Mass
99 kg
Dry mass
99 kg
Total mass with attached objects
109 kg
Length
0.8 m
Diameter
1.30 m
Span
2.4 m

Deep space

Deep-space catalog entry
D00210
Final central body
Earth
Phase start
December 6, 1968
Phase outcome
Reentered (orbital decay) · October 28, 1975

Source: GCAT payload, deep-space and lander catalogs, Jonathan C. McDowell (CC BY 4.0); Wikidata Q1563521 (CC0).