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List:       kstars-devel
Subject:    Re: [Kstars-devel] Extent of precession and nutation calculations
From:       Jason Harris <kstars () 30doradus ! org>
Date:       2008-06-30 19:01:10
Message-ID: A4400670-0DC4-49CE-BC12-CC7500D72C87 () 30doradus ! org
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The precession circle is larger than a few degrees, but you're right,  
it should never go as far as Scorpius.  I'll see if I can reproduce  
the problem when I get home.

Jason

On Jun 30, 2008, at 11:55 AM, Akarsh Simha wrote:

> Hi
>
> How far into the future are precession and nutation calculations used
> in KStars accurate?
>
> My friend found a situation with the Date = 4th July 30000 AD,
> Location = Madras, India, where Scorpius showed up at the North
> Pole. Of course, setting the date this far is possible only with the
> older versions of KDE (3.5.8).
>
> If my understanding of precession is right, the earth will never
> topple over, which means that Scorpius will never land up at the North
> pole, and the North pole will trace only a circle with a radius of a
> few degrees on the celestial sphere.
>
> Regards
> Akarsh
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