Epoch J2000.0 Equinox J2000.0
|Apparent magnitude (V)||+3.50|
|Distance||290 ± 25 ly
(89 ± 8 pc)
Beta Cancri (β Cnc / β Cancri) is the brightest star in the constellation Cancer. It has the traditional name Tarf (Altarf), of uncertain derivation but perhaps from Arabic الطرف aţ-ţarf "the eye" or طرفة aţ-ţarfah "the glance (of Leo)". It is approximately 290 light years from Earth.
The primary component, β Cancri A, is an orange K-type giant with an apparent magnitude of +3.50 and absolute magnitude of -1.25 (visual). It has a faint, fourteenth magnitude companion, β Cancri B, located 29 arcseconds from the primary.