New ΔT constraints from Ming-era Chinese eclipse records tighten prior estimates and indicate a steeper ΔT decrease between 1514 and 1567 than previously modeled.
In combination, we need to set a ΔT constraint of −227 s ≤ ΔT ≤ 497 s in 1485 to satisfy these reports
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Variable Earth's Rotation Speed in the 14th to 16th Centuries: New {\Delta}T Constraints from Chinese Eclipse Records
New ΔT constraints from Ming-era Chinese eclipse records tighten prior estimates and indicate a steeper ΔT decrease between 1514 and 1567 than previously modeled.