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The brightest star of Canis Minor is like Sirius a double system of a main sequence star and a white dwarf.
The yellow Procyon A is surprisingly bright for its color and could be a subgiant, which becomes a red giant.
Procyon B is even more dense as Sirius B. Once it was bigger as Procyon A.

Constellation: Canis Minor
Age: 1.7 billion years
Distance: 11.41 light-years
Radial velocity: -4 km/sec
Orbit period of Procyon A and B: 40.65 years

Procyon A

Spectral class: F5
Visual magnitude: 0.38
Luminosity: 7.508 * Sun
Mass: 1.78 * Sun
Diameter: 1.443 * Sun

Procyon B

Spectral class: DA
Visual magnitude: 10.64
Luminosity: 0.000591 * Sun
Mass: 0.65 * Sun
Diameter: 0.0194 * Sun

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Photo: Eso

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