Beta Cancri (β Cnc, β Cancri) is the brightest star in the constellation Cancer. It has the traditional name Tarf or Al Tarf (Altarf), certainly a derivation from Arabic الطرف aṭ-ṭarf "the eye" or طرفة aṭ-ṭarfah "the glance (of Leo)". It is approximately 290 light years from Earth.
This is an orange K-type giant,about 49 times the radius of the Sun, with an apparent magnitude of +3.50 and absolute magnitude of -1.25 (visual). It has a faint, fourteenth magnitude, red dwarf companion star located 29 arcseconds away.