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Procyon (Alpha Canis Minoris) Brightest star in the constellation of Canis Minor and one of the stars nearest to the Sun. The star, known as Procyon A, has a faint white dwarf companion, Procyon B. Characteristics: apparent mag. 0.34 (A), 10.8 (B); absolute mag. 2.6 (A), 13.1 (B); spectral type F5 (A), wF (B); distance 11.4 light-years.