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Proper NameDiadem
Bayer DesignationAlpha Comae Berenices
Flamsteed Number42 Comae Berenices
HR (BSC)4968 (A), 4969 (B)
HD114378 (A), 114379 (B)
ConstellationComae Berenices
Right Ascension13h 9m 59s
Declination+17° 31' 46"
Distance58 light years
18 parsecs
MagnitudeApparent: +4.32
Absolute: +3.06
Spectral ClassF5V bright yellow dwarf (A), F6V bright yellow dwarf (B)
Optimum VisibilityApril
NotesThe component stars of this binary system lie some 10 AU from one another, and complete a mutual orbit over a period of a little under twenty-six years. The traditional name Diadem is now formally applied to just one of the two component stars, Alpha Comae Berenices A, which is marginally the brighter of the two.

A binary system consisting of a pair of bright yellow dwarf stars similar to our own Sun, but with a somewhat higher temperature.

Imagery provided by Aladin sky atlas


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