Sothic Cycle

• The Sothic Cycle is the period taken for the star Sirius to return to exactly the same position in the sky relative to the Sun. once every 1,460 years in the Julian Calendar.
• The Sun’s rise at the beginning of the New Year (1st January), coincides with the Heliacal Rising of Sirius

Dating the Pharaoh’s Dynasties

• The Sothic Cycle was used by the Historian Eduard Meyer of the Berlin School of Egyptology in 1904, to date the Dynasties of the Egyptian Pharaohs, as written by the Egyptian Priest Manetho (c.323-246 BCE).
• However, as the Astronomer Ptolemy fails to mention the 140 CE rising of Sirius, Meyer’s theory of dating the Dynasties lacks credibility.

The Sothic Cycles (Sunrise coinciding with the Heliacal Rising of Sirius)

• 42,40 BCE  (According to Meyer)
• 2,780 BCE (ditto)
• 1,320 BCE (ditto) coincides with the Egyptian Pharaoh Akhenaten
• 140 CE (ditto) coincides with the Emperor Hadrian and recorded by Censorinus.
• 1,600 CE
• 3,060 CE