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Here are details about a : Space commemorative cover or Space Cover.
Cosmodrom : Baikonur
Date of Cancellation: Nov. 16, 1968 Kind of Event : Launch Launch pad : Baikonur KAZ
habité?/manned?: robot Mission type : Experimental & Science
ou?/where?: au sol - ground
autographe?: non - none
Description : 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.