"Henri Wilson" <HW@..> wrote in message
> On Sat, 18 Mar 2006 18:36:33 -0000, "George Dishman"
>>"Henri Wilson" <HW@..> wrote in message
>>> there is very little diference between e=0 and e=0.05
>>If your code is wrong, all of the effect at e=0.05
>>may be due to the error. You need to sort the bug.
> You're becoming boring George.
> The error is merely in the scaling of the blue velocity curve.
> It has been fixed.
Does it now give a valid scale for the curve?
> My program uses a very efficient method to determine velocity and
> direction of
> movement around any orbit. It stores all the info in several large arrays.
> secret of my program is that it uses equal time steps not equal angles. It
> doesn't use elliptical equations. It relies solely on a=GM/r^2. Circular
> are handled differently. As one would expect, there is little difference
> brightness curves for e= 0 and e= 0.05
> Normally 20000 sample points is quite adequate when working below the
> distance. Increasing that to 60000 makes virtually no difference to
Given the recent discussion on extinction
distance, I might try 0.0047 light years
anyway but it will be at the weekend, I have
too much else to do tonight.