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Alpha Comae Berenices




Alpha Comae Berenices (α Com / α Comae Berenices) is a Star in the Constellation Coma Berenices (Berenice's Hair). Although it has the Bayer Designation "alpha", at Magnitude 4.32 it is actually fainter than Beta Comae Berenices . It also has the traditional name '''Diadem'''. It is said to represent the crown worn by Queen Berenice .

It is a Binary Star , with almost equal components of magnitudes 5.05m and 5.08m orbiting each other with a period of 25.87 years. The system, estimated to be 65 Light Years distant, appears so nearly "edge-on" from the Earth that the two stars appear to move back-and-forth in a straight line, but it is not an Eclipsing Binary . The mean separation between them is approximately 10 A.U. , about the distance between the Sun and Saturn .