Procyon is the brightest star in the constellation Canis Minor and at only 11.4 light years[1] distance it is one of the closest of bright stars. Procyon is actually a binary system with the larger, Procyon A, being a bright main-sequence star and Procyon B it's white dwarf companion.

Image: Procyon's position in Canis Minor

Procyon is one of three stars which form the asterism, the Winter Triangle.


[1] Brilliant Starsby Patrick Moore - ISBN 0-304-34903-8