A recently discovered inscription on an ancient Egyptian ointment jar mentions the heliacal rising of Sirius. In the time of the early Pharaohs, this specific astronomical event marked the beginning of the Egyptian New Year and originally the annual return of the Nile flood, making it of great ritual importance. Since the Egyptian civil calendar of 365 days permanently shifted one day in four years in comparison to the stars due to the lack of intercalation, the connection of a date from the Egyptian civil calendar with the heliacal rising of Sothis is vitally important for the reconstruction of chronology. The new Sothis date from the Old Kingdom (3rd–6th Dynasties) in combination with other astronomical data and radiocarbon dating re-calibrates the chronology of ancient Egypt and consequently the dating of the Pyramids. A chronological model for Dynasties 3 to 6 constructed on the basis of calculated astronomical data and contemporaneously documented year dates of Pharaohs is presented.

最近在古埃及药膏罐上发现的铭文提到天狼星的日升升起。在法老时代初期，这一特殊的天文学事件标志着埃及新年的开始，最初标志着尼罗河洪水的年度回归，使其具有重要的仪式意义。由于缺少插层，埃及365天的公历与星星相比在四年中永久地偏移了一天，因此将埃及民历的日期与Sothis的太阳升起联系起来对于重建卫星至关重要。年表。新的Sothis日期来自旧王国（第三至第六王朝），结合其他天文数据和放射性碳年代测定法，重新校准了古埃及的年代，因此也重新定义了金字塔的年代。