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    Re: Precession and Nutation
    From: John D. Howard
    Date: 2017 Jan 31, 07:20 -0800


    Just to pile on to what David P. said - you can get the H.O. 249  vol 2 & 3 free download from many places on the internet.  I think that vol 1 is also avaible for download - the only volumn that goes out of date.

    The official, U.S.N.O. Air Almanac is avaible for free download at their website, just Google " USNO Air Almanac".  It is basicly the same as the Nautical Almanac but lists data ever 10 minutes vis every hour and the moon data is less precise.

    I prefer paper books but to learn or carry around with you the e-book versions are good and free.

    John H.

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