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Here are details about a : Space commemorative cover or Space Cover.
Cosmodrom : USA
Date of Cancellation: Feb. 17, 1959 Kind of Event : Launch Launch pad : USA KSC (FL)
habité?/manned?: robot Mission type : Meteorology
METEO
ou?/where?: au sol - ground
autographe?: non - none
Description : Vanguard 2 was an earth-orbiting satellite designed to measure cloud-cover distribution over the daylight portion of its orbit. The spacecraft was a magnesium sphere 50.8 cm in diameter. It contained two optical telescopes with two photocells.
The satellite was spin stabilized at 50 rpm, but telemetry data were poor because of an unsatisfactory orientation of the spin axis. The power supply for the instrumentation was provided by mercury batteries.
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