Mizar and Alcor in the Constellation Ursa Major

The multiple star systems Mizar A, Miza B and Alcor. 127mm Meade Apo Refractor and astro-modded Canon 200d DSLR. A stack of 30 sec images taken at ISO800 and ISO400. Credit: Pip Stakkert. 

" To the keen naked eye, Mizar and Alcor appear as two stars in the tail of Ursa Major the Great Bear or the handle of 'the Plough'. In truth they are two multiple star systems. Mizar is a quadruple star system whilst Alcor is a binary system. These star systems are 83 light years from our Sun and are moving with a common proper motion.  Between Mizar and Alcor, the 8th-magnitude star Sidus Ludoviciana is a distant background object. We were pleased that we were able to split two of Mizar's four component stars." - Kurt Thrust" current Director of the Jodrell Plank Observatory