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F star

noun, Astronomy.
a white to yellow star, as Canopus, Polaris, or Procyon, having a surface temperature between 6000 and 7500 K and an absorption spectrum in which the pair of ultraviolet lines of singly ionized calcium and the Balmer series of hydrogen are of about equal strength.
Compare spectral type. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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