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
ou?/where?: au sol - ground
autographe?: non - noneDescrizione : 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
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USA 48 | 54,- |
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Pagina : future · Ref: USA 48 Avvenimento Spaziale : DISCOVERER 21 (RM 2) (SATELLITE) · THOR AGENA
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