What is the brightest star in the sky?

The brightest star in Earth’s night sky is Sirius (Alpha Canis Majoris), also called the Dog Star. Its apparent magnitude is −1.46, making it almost twice as bright as Canopus, the next brightest star.

Sirius is a binary system: a luminous Atype mainsequence star (Sirius A) and a faint white dwarf companion (Sirius B) orbiting each other every 50 years. Sirius looks so bright to us because it is both intrinsically luminous and nearby (8.6 lightyears).

In answers, name the constellation (Canis Major), give the magnitude (−1.46), and mention its binary nature for full credit.