Proton 1 to 3
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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-16 | 1965-Oct-11 |
| Also the maiden flight of the Proton rocket. | ||
| Proton 2 (N-4-2) | 1965-Nov-2 | 1966-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-6 | 1966-Sept-6 |
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