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    Re: GHA Aries long term Table?
    From: Peter Hakel
    Date: 2014 Dec 19, 04:44 +0000
    I am not sure if the attachment went through - trying again.

    I should also add that this file contains a correction of an error I had made in the past in entering the nutation term (see page 88 in Meeus's book). The resulting change is minuscule with no practical effect for celestial navigation purposes - but, if you look closely, it's there. All almanac spreadsheets have been corrected accordingly and these new versions are available at the website for download.


    Peter Hakel


    From: Peter Hakel <NoReply_PeterHakel@fer3.com>
    To: pmh099---.com
    Sent: Thursday, December 18, 2014 8:21 PM
    Subject: [NavList] Re: GHA Aries long term Table?

    Samuel,

    Formulae from Chapter 12 of Jean Meeus’s book “Astronomical Algorithms (Second Edition)” are encoded in the attached Excel spreadsheet.


    Peter Hakel
    http://www.navigation-spreadsheets.com/




    From: Samuel L <NoReply_SamuelL@fer3.com>
    To: pmh099---.com
    Sent: Wednesday, December 17, 2014 6:16 AM
    Subject: [NavList] GHA Aries long term Table?


    2015 is coming....surely.

    HO 249 Volume 1 page 340 has "Table 4- GHA Y for the years 2006 to 2014" which is a very compact way to determining GHA Y (Aries) for stars.

    See here (page 339)-

    http://www.waypointamsterdam.com/Han...Pub249Vol1.pdf
     
    I use it instead of carrying around the NA. (I can easily calculate Hc and Az using the Spherical Trig formulas so I can reduce the amount of paper on board).

    But, that sheet will expire this year. Do you know of the same Table 4 for the coming years?

    Or rather...do you know of quick, accurate way to determine GHA Aries?

    Thanks,
     
    Sam L.




    File: 129690.aries_stars.xls
       
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