[LEAPSECS] new delta-T data point

[Paul Hirose]

On 2017-10-30 16:23, Tom Van Baak wrote:
> https://academic.oup.com/astrogeo/article/58/5/5.39/4159289/Solar-eclipse-of-1207-BC-helps-to-date
> ( https://academic.oup.com/astrogeo/article-pdf/58/5/5.39/20098470/atx178.pdf )

"To facilitate the calculations we adopted the latest solution for the 
historical variations in the Earth’s rotation (Stephenson et al. 2016)..."

Relevant to UTC are the tables of historic LOD (length of day) values 
and extrapolations into the future. In 2100 the predicted LOD is 1 ms. 
In 2200 it's 3 ms, same as at the dawn of the leap second era. (However, 
the error estimate is ±3 ms.)

Earth Rotation - the Change in the Length of Day and ΔT
http://astro.ukho.gov.uk/nao/lvm/