Panier Recherches : timbres, enveloppes.

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Here are details about a :
Space commemorative cover
or Space Cover.

Cosmodromo / Luogo : USA

Data di annullo: 18 Fév. 1961
Tipo di Evento : Lancio
Rampa di Lancio / Luogo : USA Vandenberg SFB (CA)
Missione con Equipaggio / Robotica : Robotica
Obiettivo/Tipo Missione : Militare / Segreto

MIL

ou?/where?: au sol - ground
autographe?: non - none

Descrizione : Discoverer 21, also known as RM-2, was an American satellite which was launched in 1961. It was a technology demonstration spacecraft, based on an Agena-B.
Upon successfully reaching orbit, it was assigned the Harvard designation 1961 Zeta 1.
Discoverer 21 was operated in a low Earth orbit, with a perigee of 243 kilometres (151 mi), an apogee of 1,026 kilometres (638 mi).
It remained in orbit until 20 April 1962, when it decayed and reentered the atmosphere.

Parola chiave :
#Pianeta,
#Razzo,

RIVISTA DELLO SPAZIO : 02 - 2015

Ultima modifica: 15/06/2015 @ 15h58