Re: [Celestia-developers] Binary Orbits Revisited!

[Fridger S. <fri...@de...>]

After Andrew has thoroughly overhauled Celestia's stars by implementing

** the [b]new Reduction of the raw Hipparcos data[/b]
** Floor van Leeuwen, 2007 'Hipparcos, the New Reduction of the Raw Data'
** Astrophysics & Space Science Library #350.
** available at http://cdsarc.u-strasbg.fr/viz-bin/Cat?I/311

with much improved parallaxes (distances), my binary orbit data need to be 
revisited as well, since --for consistency-- the barycenter distances, RA, Dec 
and the primary's spectral classes are all taken from Celestia's /stars.txt 
merged with revised.stc/.

Moreover, Andrew made use of the 'Modify' statement in his new 'revised.stc' 
file, which my visualbins.pl and spectbins.pl Perl scripts in SVN do not yet 
understand. Since I found some time in the train during my past days of 
travelling, here are my adapted Perl scripts along with the resulting improved 
binary orbit data files.

Everything you need for testing is contained in this archive (~2.5 MB):

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http://www.shatters.net/~t00fri/images/binaries_rev.zip
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(my modified Perl scripts, along with the current stars.txt, revised.stc from 
SVN (r 4643), all input data files and the modified output files, 
visualbins.stc and spectbins.stc).

If you have Perl along with the Math::libm module installed, you can easily 
run the Perl scripts yourself.

Please continue reading here:

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http://www.shatters.net/forum/viewtopic.php?f=4&t=13486
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In this parallel and more detailed forum post, I have notably also presented a 
couple of stiking comparisons of my binary orbits with direct astrometric 
orbit measurements, partly extending over almost 100 years!

Fridger