Mathematical Analysis of Kinetic Priority in the Solar Calendar Septenary Array and Construction of an Astrodynamical Perturbation Model for the 11th Century BCE

This paper addresses the structural contradiction inherent in the sequence of the seven-day week in the modern solar calendar. This sequence cannot be mathematically or physically justified by either geocentric or heliocentric models based on actual planetary properties. By cross-referencing the anomalous recalibration of the computational axes in the ancient Mesopotamian astronomical tablets (MUL.APIN) with the irregular planetary orbit descriptions during the King Wu's conquest of Shang (c. 1050 BCE) in the Chinese Bamboo Annals, we propose a celestial mechanical perturbation model. This model postulating the phased fragmentation of an unknown celestial body (the "Fifth Planet") situated between Mars and Jupiter from 1200 to 1000 BCE.When using the orbital position of this Fifth Planet (heliocentric distance of approx. 2.8 au) as the origin of the coordinate axes, a physical "Kinetic Priority" is perfectly derived from a physical phase transition model based on the competition between luminance energy and orbital frequency, yielding the sequence: Sun → Moon (Earth) → Mars → Mercury → Venus → Jupiter → Saturn. This study mathematically delineates the angular momentum redistribution following the collapse of the Fifth Planet and the generation process of magnetohydrodynamic (MHD) drag by high-energy plasma debris against the Venusian magnetosphere as a variation of the restricted three-body problem. Consequently, we demonstrate the physical transition period that fixed the current inversion of the Jupiter-Venus sequence. This cross-disciplinary framework integrates the missing links between astrophysics and historical information science, revealing that the calendar sequence itself serves as a physical scar of an irreversible celestial mechanical catastrophe within the solar system.