Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Beta Cancri is the brightest star in the constellation Cancer. It has the traditional name Tarf or Al Tarf, certainly a derivation from Arabic a - arf "the eye" or a - arfah "the glance". It is approximately 290 light years from Earth. The primary component, Cancri A, is an orange K-type giant with an apparent magnitude of +3.50 and absolute magnitude of -1.25. It has a faint, fourteenth magnitude companion, Cancri B, located 29 arcseconds from the primary