Re: solar year range

Op 13-apr-2009, om 23:35 heeft Irv Bromberg het volgende geschreven:

> Dear Calendar People:
>
> I have added "Longest Solar Year" (grey) and "Shortest Solar  
> Year" (black) curves to my equinoctial and solstitial year length  
> plot, attached as a PDF (36 KB).

Irv,
what is the timescale for your year lengths?  UT or TDT?
the comment about increasing day length suggests that you express the  
year length in UT.  However then the curves become very dependent on  
the exact expression you use for UT.  Also I think that we cannot  
extrapolate the evolution of UT that far outside the interval of the  
historical records from -700 to +2000 .

Otherwise a very neat graph,
--
Tom Peters