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Proton 4 (Proton-2 1 / N-6 #1)

Proton 4

The N-6 (a.k.a. Proton-2) was an improved version of the N-4 satellite. It was designed to study the interaction of elementary particles with energies in excess of 1012 eV up to 1015 eV. Due to the instrumentation, the N-6 was much heavier than the N-4. Of its total mass of 17 t, about 12.5 t were scientific instrumentation, making the N-6 the heaviest scientific satellite up to this date. A second N-6 was never launched.

Nation: USSR
Type / Application: Science
Power: 4 deployable fixed solar arrays, batteries
Mass: 17000 kg
Orbit: 248 km × 477 km, 51.55
Satellite COSPAR Date LS Launch Vehicle Remarks
Proton 4 (Proton-2 1, N-6 #1) 1968-103A 16.11.1968 Ba LC-81/24 Proton-K
Proton 5 (Proton-2 2, N-6 #2) - cancelled Ba Proton-K
Further Proton missions:

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