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    Dynamic time (was)Re: millenium - 2000 or 2001?
    From: Rodney Myrvaagnes
    Date: 1999 Dec 29, 9:27 AM

    This seems to me to be more on-topic for a navigation list.
    I would suppose that anyone on this list knows that the
    earth's rotation period, orbital period, and the vibration
    period of a cesium atom are all natural quantities that
    don't divide evenly into each other.
    Being a frivolous type, I view leap seconds as another
    excuse to pop a cork. But if you actually missed one, you
    could bias celestial sights as much as a quarter mile.
    Perhaps you (Tony) would care to expand on Terrestrial
    Dynamic Time. At least I will read it if you do.
    On Tue, 28 Dec 1999 21:02:18 -0800, Tony wrote:
    >It seems to me that all this discussion does indirectly point out need for
    >astronomical computations being carried out with respect to Julian day/date,
    >irrespective of calendar date other than indirection through epochs. The fine
    >tuning through leap year and leap second, plus Terrestial Dynamic Time is
    >then better understood.
    Rodney Myrvaagnes                   J36 Gjoa
    Associate Editor           Electronic Products
    My oyster knife is Y2K compliant

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