Tags: Star.
Xi Ursae Majoris (Xi UMa ξ Ursae Majoris ξ UMa) is a star system in the constellation Ursa Major. On May 2 1780 Sir William Herschel discovered that this was a binary star system making it the first such system ever discovered. It was the first visual double star for which an orbit was calculated when it was computed by Félix Savary in 1828.The two components are yellow G-type main-sequence stars. The brighter component Xi Ursae Majoris A has a mean apparent magnitude of +4.41.
