Tags: Star.
Sidus Ludoviciana is a 8th-magnitude star in the Big Dipper constellation 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.