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    Re: Vernal equinox
    From: Lu Abel
    Date: 2014 Mar 21, 16:11 -0700
    There was a wonderful posting on the list (I think it was last year, could have been the year before) noting that the sun's true path was slightly below its theoretical one due to the moon's pull.   So the question became did the equinox occur when the sun's theoretical path crossed the equator or its actual path....



    From: Peter Hakel <pmh099---.com>
    To: luabel{at}ymail.com
    Sent: Friday, March 21, 2014 3:06 PM
    Subject: [NavList] Re: Vernal equinox


    Declination is measured against the celestial equator - are you referring to precession and nutation?  Can you point me to H. Prinz's original postings?


    Peter Hakel



    From: Bill B <billyrem42---.net>
    To: pmh099---.com
    Sent: Friday, March 21, 2014 2:01 AM
    Subject: [NavList] Re: Vernal equinox


    On 3/21/2014 2:21 AM, Bill B wrote:
    ....As George H. might query,
    >
    My bad. Give credit where credit is due. Herbert Prinz, both in text and
    graphically, illustrated the historic subtleties.
    
    Risking censure for diverting the hot traditional-navigation
    discussion-group topic from 21st century avionics and interpersonal
    electronic communications, my question remains, "... measured against
    exactly what?"
    
    View and reply to this message: http://fer3.com/arc/m2.aspx?i=127307


    View and reply to this message: http://fer3.com/arc/m2.aspx?i=127329


       
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