Kappa Tauri (ú Tau, ú Tauri) is a double star in the constellation Taurus, the two components ú<sup>1</sup> Tauri and ú<sup>2</sup> Tauri both members of the Hyades open cluster. The pair are approximately 150 light years from Earth and are separated from each other by about six light years.
The system is dominated by a visual double star, ú<sup>1</sup> Tauri and ú<sup>2</sup> Tauri. ú<sup>1</sup> Tauri is a white A-type subgiant with an apparent magnitude of +4.22. It is emitting an excess of infrared radiation at a temperature indicating there is a circumstellar disk in orbit at a radius of 67 AU from the star. ú<sup>2</sup> Tauri is a white A-type main sequence star with an apparent magnitude of +5.24.
Between the two bright stars is a binary star made up of two 9th magnitude stars, Kappa Tauri C and Kappa Tauri D, which are 5.5 arcseconds from each other (as of 2013) and 175.1 arcseconds from ú<sup>1</sup> Tau. Two more 12th magnitude companions fill out the visual group: Kappa Tauri E, which is 145 arcseconds from ú<sup>1</sup> Tau, and Kappa Tauri F, 108.5 arcseconds away from ú<sup>2</sup> Tau.
The bright pair are both members of the Hyades star cluster, while the fainter stars are all much more distant background stars.
Kappa Tauri was photographed during the solar eclipse of May 29, 1919 by the expedition of Arthur Eddington in PrÃÂncipe and others in Sobral, Brazil that confirmed Albert Einstein's prediction of the bending of light around the Sun from his general theory of relativity which he published in 1915.