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Sfera (satellite) : ウィキペディア英語版 | Sfera (satellite)
Sfera (TEKh-44) is a small passive satellite deployed during a spacewalk from the ISS in August 2012.〔(Gunter - Sfera )〕 ==Description== Also called the Vektor-T calibration sphere, the Sfera satellite is used to determine the density of the upper atmosphere by measuring how much drag occurs when the satellite passes through it.〔(What a ball-shaped Sfera satellite looks like - ESA )〕 TEKh-44 is a shiny sphere 53 cm (20.8 inches) across weighing 14 kg (~31 pounds).〔(ISS Exp. 32 - Russian EVA-31 Updates )〕
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