Proton 1 to 3

Author(s): DaveBowman2001

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The Proton (N-4) were a series of Soviet scientific satellites designed to study cosmic rays and charged particles in space. Weighing around 12.2 tons, a total of four satellites were launched between 1965 and 1966, only three were successful. They were the very first payloads of the UR-500 rocket, which would be later renamed after the satellites themselves.

A Proton (N-4) satellite in low Earth orbit

Proton N-4
(1965-1966)
Mission Start End
Proton 1
(N-4-1)
1965-Jul-161965-Oct-11
Also the maiden flight of the Proton rocket.
Proton 2
(N-4-2)
1965-Nov-21966-Feb-6
(N-4-3) 1966-Mar-24
Launch failure caused by engine malfunction in the 2nd stage at T+122 seconds
Proton 3
(N-4-4)
1966-Jul-61966-Sept-6

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