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FK Comae Berenices star
A fast-spinning giant star of spectral type G or K (about as warm or slightly cooler than the Sun but much larger) whose light variations have the same period as the rotation-typically a few days. Changes in brightness of a few tenths of a magnitude are caused by a surface that is more luminous in some areas than others. FK Com stars may represent a late stage in the evolution of common-envelope stars at which the stellar cores have coalesced.
Related entry
• variable stars
Related category
• TYPES OF STAR
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