vgardiner Jul 16, 2009
----- Original Message -----
From: "Bill J Gray" <pluto@...>
To: <guide-user@yahoogroups.com>
Sent: Friday, July 17, 2009 11:22 AM
Subject: Re: [guide-user] How to display Binary Star orbits
> Hi Vincent,
>
> All one should need to get binaries to show up correctly is to
> download the current Guide update. The improvement in question
> is described at
>
> http://www.projectpluto.com/update8b.htm#orbital_binaries
>
> Note that the actual "orbit" isn't shown as an ellipse or
> anything like that. Instead, the stars are simply shown at their
> proper position angles/separations. If you animate with a large
> enough step size (usually several years), then you can see the
> stars orbiting one another.
>
> Also, data on their separation/PA is given in 'more info'.
>
> A little side note: one slight problem with the animation
> procedure is that due to proper motion, the stars don't stay
> nicely centered on the screen. They'll drift off as they orbit
> one another. The way around this is to shut off proper motion,
> as described at
>
> http://www.projectpluto.com/update8d.htm#no_prop_motion
>
> -- Bill
>
>
>
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