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    Re: Polaris SHA
    From: Michael Dorl
    Date: 2008 Sep 19, 07:13 -0500

    
    > I did not expect SHA to vary so much and move up and down from year
    > beginning to year end.  I regarded SHA as an angular distance from the first
    > point of Aires.  While the reference point changes with precession, the
    > relationship to the reference point remains relatively constant noting the
    > change of relationships due to proper motion and shifts (relativity) from
    > the Earth moving at nominally 70,000 mph around the Sun and their
    > relationships to the celestial sphere you have mentioned in the past.
    >
    > If I read you correctly, any small changes in the relationships between the
    > stars (for many reasons) that might seem minor on a star ball or a
    > conceptual celestial sphere are magnified by the coordinate
    > construct/system.
    >
    >
    Does it make sense to think of it this way?  Any point close to the
    coordinate system origin
    can experience large relative coordinate shifts when the origin is moved.
    
    Mike
    
    
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