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    Re: Index Error - Comparison to SD per Nautical Almanac
    From: Lars Bergman
    Date: 2020 Nov 25, 14:04 -0800

    Jim, you wrote "I don't know whether this .2 minute reconciling item to the NA  SD is considered large or not.  I wonder if it becomes an important factor in doing moon-sun lunars. It appears that my measurement of that LD would be off .2 minutes ...".

    If my analysis is correct (I am not quite sure yet) a moon-sun lunar would be twice that amount, i.e. 0.4' too large. It is even worse with a moon-star lunar, it will be 0.8' off. So I think that your side error has to be considered as large, at least when it comes to lunars. Maybe Frank has looked into this in more detail and can share some of his wisdom with us ...


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