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    Re: The Star of Bethlehem and Navigation
    From: Geoffrey Kolbe
    Date: 2009 Jan 01, 11:28 +0000

    No Marcel, I think the quoted error was based on the uncertainty of the
    timing of the data, which leads to a lot of scatter. The ancients did not
    have clocks as we know them. In any case, the data around the start of the
    current era are very sparse. There is a lot of data from the Babylonians
    before and from the Chinese and Arabs after, but not much during this time.
    Geoffrey Kolbe
    At 11:01 01/01/2009, you wrote:
    >Thank you Geoffrey, that's the sort of information I really was
    >looking for. I was aware that deltaT is estimated from records of
    >historical eclipse events, but didn't have an idea on how accurate
    >those values would be. The paper you refer to indicates apparently
    >"not more than 8 minutes". Unfortunately I do at present not have
    >access to this article. I could however imagine that this maximal
    >error relates to time periods where no data are available, i.e. to
    >times in-between the points which were used for fitting the function.
    >In case some of the data points would be near the time in question,
    >the expected error might actually be considerably less.
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