Ktau

KTau, also known as Kappa Tauri, is a star located in the constellation of Taurus. It is a blue-white main-sequence star with an apparent magnitude of 4.25, making it visible to the naked eye under dark skies. KTau is approximately 130 light-years away from Earth.

KTau is a binary star system, consisting of a primary star, KTau A, and a companion star, KTau B. KTau A is a B-type main-sequence star with a spectral type of B9.5V. It has a mass about 3.5 times that of the Sun and a radius approximately 3 times larger. KTau B is a fainter companion with an apparent magnitude of 10.5, located about 1.5 arcseconds away from KTau A.

The star KTau is of interest to astronomers due to its binary nature and its relatively close proximity to Earth. It provides a useful system for studying stellar evolution and binary star dynamics. The system is also a member of the Hyades star cluster, a nearby open cluster in Taurus.