Perhaps the most famous exoplanet in the constellation is 55 Cancri e, a super-Earth that was (for a time) identified as a " diamond world." The original observations in 2010 suggested that the host star had more carbon than oxygen in its interior. Other notable stars include the γ Cnc (Asellus Borealis), the "northern donkey," a white-hued star (158 light-years), and δ Cnc (Asellus Australis), "southern donkey," an orange-hued giant star (136 light-years). The star α Cnc (Acubens), which means "the claw," is a double star with a primary of magnitude 4.3, 173 light-years from Earth. It is an orange-hued giant star about 290 light-years from Earth. Β Cnc is the brightest star in Cancer at magnitude 3.5.
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