ملف:Procyon A and Procyon B (29468251154).jpg

Procyon A and Procyon B Credit & Copyright: Giuseppe Donatiello

J2000.0 07h 39m 18.11950s +05° 13′ 29.9552″ Procyon (α Canis Minoris), is the brightest star in Canis Minor. To the naked eye, it appears to be a single star, the 8th in the night sky with a mag. 0.34. It is a binary star system, consisting of a white main-sequence star of spectral type F5 IV–V, named Procyon A, and a faint and very difficult to detect white dwarf companion of spectral type DQZ, named Procyon B with mag. 10.7. The pair orbit with a period of 40.82 years along an elliptical orbit with an eccentricity of 0.407. The plane of their orbit is inclined at an angle of 31.1° to the line of sight with the Earth. Probably, this is the only image available in optical in which it appears Procyon B.