Sothis has three suns, two of which are small and orbit the primary star; Sopit. Sopit is a blueish white star, which provides all of the light and heat for Sothis. The second star is D’aakun, a small dim star which orbits Sopit once every 50 years. The third star; Harkin is smaller and darker still, and orbits Sopit every 6 years.
The most important star in the night sky is Solari, whose Heliacal rising marks the first day of the year.