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> 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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