Sirius its constellation, Canis Major (Greater Dog). The heliacal rising of Sirius marked the flooding of the Nile in Ancient Egypt and the "dog days" of summer for the ancient Greeks, while to the Polynesians in the Southern Hemisphere the star marked winter and was an important reference for their navigation around the Pacific Ocean. The brightest star in the night sky, Sirius is recorded in the earliest astronomical records. Its displacement from the ecliptic causes this heliacal rising to be remarkably regular compared to other stars, with a period of almost exactly 365.25 days holding it constant relative to the
MV Sirius Star ever to be hijacked. It is estimated that for the pirates to reach "Sirius Star", they must have voyaged south for three to four days. At the time of the attack, the ship was carrying a full load of of crude oil more than one-quarter of Saudi Arabia's daily oil production output, and worth at least and was bound for the United States via the Cape of Good Hope. According to officials from Puntland, the pirates anchored "Sirius Star" at the Somali port of Harardhere, contrary to early reports from the United States Navy that she was anchored near Eyl.