Addendum 2020 to ‘Measurement of the Earth’s rotation: 720 BC to AD 2015’

  title={Addendum 2020 to ‘Measurement of the Earth’s rotation: 720 BC to AD 2015’},
  author={L. Morrison and F. Stephenson and C. Hohenkerk and M. Zawilski},
  journal={Proceedings of the Royal Society A},
Historical reports of solar eclipses are added to our previous dataset (Stephenson et al. 2016 Proc. R. Soc. A 472, 20160404 (doi:10.1098/rspa.2016.0404)) in order to refine our determination of centennial and longer-term changes since 720 BC in the rate of rotation of the Earth. The revised observed deceleration is −4.59 ± 0.08 × 10−22 rad s−2. By comparison the predicted tidal deceleration based on the conservation of angular momentum in the Sun–Earth–Moon system is −6.39 ± 0.03 × 10−22 rad s… Expand

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720 BC to AD 2015
  • Proc. R. Soc. A 472, 20160404
Historical changes in UT/LOD from eclipses
  • 2020