===========================================================================
VSOP87C VENUS HELIOCENTRIC RECTANGULAR X,Y,Z COORDINATES
PHP Demo 1 by Jay Tanner - 2024


For DATE:  yn Mmm dd DoW =  1499 Dec 19 Thu (Julian Calendar)
and TIME:  HH:mm:ss      =  12:00:00 TT

Julian Date Value =  2268920.00000000
Julian Day Number =  2268920


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RAW VSOP87C HELIOCENTRIC RECTANGULAR X,Y,Z COORDINATES AND DISTANCES IN AU

Venus hXYZR =
'-0.04567388896904 -0.72582381397933 -0.01057782927588 0.72733637578857'

Earth hXYZR =
'-0.11472528482000 +0.97636452649026 -0.00000200035330 0.98308167492309'

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Below are a few known test values taken from
the original FORTRAN VSOP87 documentation.

-----------------------------------------
VSOP87C Venus    Date=1099 Dec 19 J   Time=12:00:00 TT   JD=2122820
-0.7099110735 -0.1240161268 +0.0364255617

VSOP87C Earth    Date=1099 Dec 19 J   Time=12:00:00 TT   JD=2122820
-0.0647576071 +0.9808979021 -0.0000030761

-----------------------------------------
VSOP87C Venus    Date=1499 Dec 19 J   Time=12:00:00 TT   JD=2268920
-0.0456738890 -0.7258238140 -0.0105778293

VSOP87C Earth    Date=1499 Dec 19 J   Time=12:00:00 TT   JD=2268920
-0.1147252848 +0.9763645265 -0.0000020004

-----------------------------------------
VSOP87C Venus    Date=1799 Dec 30 G   Time=12:00:00 TT   JD=2378495
-0.5783536698 +0.4245514325 +0.0396658692

VSOP87C Earth    Date=1799 Dec 30 G   Time=12:00:00 TT   JD=2378495
-0.1522449491 +0.9713689619 +0.0000002038


The dates and times can be changed within the program
to experiment with other values.