[LEAPSECS] new delta-T data point

Steve Allen sla at ucolick.org
Fri Nov 3 13:32:24 EDT 2017

On Mon 2017-10-30T16:23:57-0700 Tom Van Baak hath writ:
> In the news...
> 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 )

Alas for Delta T on date -1206 October 30, that annular eclipse moves
almost entirely along a parallel of latitude, so Delta T pretty much
only affects the endpoint where the eclipse happened at sunset.

I'm a bit disturbed by the plotted path of that eclipse because it is
very wide and includes the entire Nile delta as well as modern
Palestine, Israel, Jordan, and Baghdad at sunset.  Unless weather
prevented it, somebody else should have made a record of that eclipse.

Steve Allen                    <sla at ucolick.org>              WGS-84 (GPS)
UCO/Lick Observatory--ISB 260  Natural Sciences II, Room 165  Lat  +36.99855
1156 High Street               Voice: +1 831 459 3046         Lng -122.06015
Santa Cruz, CA 95064           http://www.ucolick.org/~sla/   Hgt +250 m

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