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Sidus Ludoviciana

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Sidus Ludoviciana is a 8th-magnitude star in asterism of the Big Dipper in the constellation Ursa Major, halfway between Mizar and Alcor. It was discovered on 2 December 1722 by Johann Georg Liebknecht, who mistook it for a planet and named it after Louis V, Landgrave of Hesse-Darmstadt. An line-of-sight companion with Mizar and Alcor (with a spectral type similar to the latter), it is roughly five times more distant.[1]

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