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Hughes: HS-312 / HS-351 / HS-353

Intelsat-4

Comstar

Intelsat-4A

Satellite Ordered Date Launcher Weight (kg) Remarks
Launch BOL
HS-312
Intelsat-4 1 22.05.1975 Atlas-SLV3D Centaur-D1A

1414

Intelsat-4 2 26.01.1971 Atlas-SLV3C Centaur-D

1414

Intelsat-4 3 20.12.1971 Atlas-SLV3C Centaur-D

1414

Intelsat-4 4 23.01.1972 Atlas-SLV3C Centaur-D

1414

Intelsat-4 5 13.06.1972 Atlas-SLV3C Centaur-D

1414

Intelsat-4 6 20.02.1975 F Atlas-SLV3D Centaur-D1A

1414

Launch failure
Intelsat-4 7 23.08.1973 Atlas-SLV3D Centaur-D1A

1414

Intelsat-4 8 21.11.1974 Atlas-SLV3D Centaur-D1A

1414

HS-351
Comstar 1A 1973 13.05.1976 Atlas-SLV3D Centaur-D1AR 1516
Comstar 1B 1973 22.07.1976 Atlas-SLV3D Centaur-D1AR   1516
Comstar 1C 1973 29.06.1978 Atlas-SLV3D Centaur-D1AR   1516
Comstar 1D 1973 21.02.1981 Atlas-SLV3D Centaur-D1AR   1516
HS-353
Intelsat-4A 1 26.09.1975 Atlas-SLV3D Centaur-D1AR

1515

Intelsat-4A 2 29.01.1976 Atlas-SLV3D Centaur-D1AR

1515

Intelsat-4A 3 07.01.1978 Atlas-SLV3D Centaur-D1AR

1515

Intelsat-4A 4 26.05.1977 Atlas-SLV3D Centaur-D1AR

1515

Intelsat-4A 5 29.09.1977 F Atlas-SLV3D Centaur-D1AR

1515

Launch failure
Intelsat-4A 6 31.03.1978 Atlas-SLV3D Centaur-D1AR

1515