1. Sirius B (also known as the "Pup"): This is a white dwarf star that orbits Sirius A with an orbital period of about 50 years. Sirius B is about 10,000 times fainter than Sirius A and has a mass approximately equal to that of our Sun. It is the closest white dwarf star to Earth.
2. Sirius C: This is a binary star system located about 8.6 light-years away from Sirius A. It consists of two red dwarf stars, Sirius Ca and Sirius Cb, that orbit each other with a period of about 5.2 years. Both stars have masses significantly lower than our Sun.
3. Beta Canis Majoris: Also known as Mirzam, this is a binary star system located about 19 light-years away from Sirius A. The primary star, Beta Canis Majoris A, is a blue-white main sequence star, while the secondary star, Beta Canis Majoris B, is a white dwarf.
4. Epsilon Canis Majoris: This is a binary star system located about 13 light-years away from Sirius A. The primary star, Epsilon Canis Majoris A, is a white main sequence star, while the secondary star, Epsilon Canis Majoris B, is a red dwarf star.
5. Omicron² Canis Majoris: This is a triple star system located about 18 light-years away from Sirius A. It consists of two binary star systems, Omicron² Canis Majoris Aa/Ab and Omicron² Canis Majoris Ba/Bb, orbiting each other with a period of about 112 years. The stars in this system are all red or orange dwarfs.