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Akari (satellite)
Akari (Astro-F) is an infrared astronomy satellite developed by Japan Aerospace Exploration Agency, in cooperation with institutes of Europe and Korea. It was launched on 21 February 2006 at 21:28 UTC (06:28, 22 February JST) by M-V rocket into Earth sun-synchronous orbit. After its launch it was named ''Akari'' (明かり), which means ''light'' in Japanese.
Its primary mission was to survey the entire sky in near-, mid- and far-infrared, through its aperture telescope.
==Technical design==
Its designed lifespan, of far- and mid-infrared sensors, is 550 days, limited by its liquid helium coolant.
Its telescope mirror is made of silicon carbide to save weight. The budget for the satellite was ¥13,4 billion (~).
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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