Proton 4

Proton 4
Spacecraft properties
Names	Proton-2 1 N-6 #1

COSPAR ID	1968-103A

Bus	N-6
Launch mass	17 t (19 tons)

Start of mission
Launch date	16 November 1968
Rocket	Proton-K^[1]
Launch site	Tyuratam (Baikonur Cosmodrome), U.S.S.R

Orbital parameters
Reference system	Geocentric
Regime	Low Earth
Perigee	248 km
Apogee	477 km
Inclination	51.55°

Proton 4 was the last in a series of spacecraft designed to study the energy spectrum and the chemical composition of cosmic rays. The spacecraft was cylindrical in form and had extended solar panels and antennas. Proton 4 also studied the possible collisions of cosmic ray particles with the nuclei of hydrogen, carbon, and iron. It was hoped that the postulated fundamental particle, the quark, might be discovered during this flight. The spacecraft was in orbit for 250 days.^[1]

References

1 2 "NASA - NSSDCA - Spacecraft - Details". nssdc.gsfc.nasa.gov. Retrieved 2016-04-03.

← 1967 · Orbital launches in 1968 · 1969 →

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