Alpha Crateris (α Crt, α Crateris) is a star in the constellation Crater. It has the traditional name Alkes, from the Arabic الكاس alkās or الكأس alka's "the cup".
In the catalogue of stars in the Calendarium of Al Achsasi al Mouakket, this star was designated Aoul al Batjna (أول ألبجن awwil albajna), which was translated into Latin as Prima Crateris, meaning the first cup
In Space Opera
- In the Dune Universe the system has the planet Rossak.