David Waltham

From Sand Grains to Solar Systems

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Lunar Evolution Calculator

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Estimate the Earth-Moon separation in the past along with the associated day-length and Milankovitch cycle periods.   Calculation assumptions are given in Waltham (2014)* and in a PowerPoint presentation.

*NB this paper is currently in peer-review and it is not recommended that the results are used unless and until the paper has been accepted (Dec, 2014)

 

Reference

Waltham, D, 2014.  Milankovitch Cycle Evolution and Uncertainty.  Geology, in review.

 

Select Parameters

Model Type
Include Elatina?
Age

Earth Day

22.93 ± 0.47 hours

Earth-Moon Distance

377.0 ± 3.4 thousand km

Obliquity Periods

36.0 ± 2.2 ky

45.5 ± 3.4 ky

Climatic Precession Periods

17.79 ± 0.53 ky

21.90 ± 0.80 ky