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    Re: Navigation without Leap Seconds
    From: Geoffrey Kolbe
    Date: 2008 Apr 22, 13:10 +0100

    George Huxtable wrote:


    However, Geoffrey and I seem to disagree seriously about its earlier value,
    around 1900, which he states to be 24.349 seconds. I'm not sure where that
    comes from,


    Geoffrey Kolbe responds:

    Hello George

    As I understand it, the formula adopted by the International Astronomic Union in 1952 and used till around 1985 was:

    Delta T = 24.349 + 72.318*t + 29.950*t^2

    where t = centuries since 1900.0

    However, you are correct that the observed Delta T seems to have been about - 2.7 seconds in 1900. All of which goes to show that time can be a very confusing subject.

    Geoffrey Kolbe

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