description Spektr-R Overview
Spektr-R was a Russian space radio telescope launched on 18 July 2011 as the centerpiece of the RadioAstron mission. It carried a 10-meter deployable antenna and worked with ground-based observatories to form an Earth-space very long baseline interferometry (VLBI) network, achieving baselines up to about 350,000 km. Operated by the Astro Space Center of the Lebedev Physical Institute, the mission studied active galactic nuclei, pulsars, and masers until contact was lost in 2019.
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What was Spektr-R launched to do?
Spektr-R was launched on 18 July 2011 as the space-based centerpiece of the RadioAstron radio astronomy mission. It worked with observatories on Earth to study radio sources at very high resolution.
How large was Spektr-R's radio antenna?
The spacecraft carried a 10-meter deployable antenna. That large reflector allowed it to collect radio signals for long-baseline interferometry.
Why did Spektr-R need ground-based observatories?
RadioAstron combined Spektr-R with ground telescopes to form an Earth-space very long baseline interferometry network. The combined baseline was far larger than the spacecraft's 10-meter antenna alone.
Was Spektr-R an optical telescope like Hubble?
No, Spektr-R was a radio telescope designed to observe radio signals rather than visible light. Its role in RadioAstron depended on combining those measurements with ground-based radio observatories.
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