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Re: Astronomical Data, property "position"


AstronomicalData["Sun", "Position"]

{0, 0, 0}

AstronomicalData["ProximaCentauri", "Position"]

{-1.453968904807471*^16, -2.431970861573526*^16,
   -2.8100702162299028*^16}

From
http://reference.wolfram.com/mathematica/ref/AstronomicalData.html
Under More Information:
	"Position"     	{x, y, z} position in heliocentric coordinates in meters
	...
	Positions are given in FK5 heliocentric coordinates in the equinox of
the date used.


From
http://en.wikipedia.org/wiki/Catalogues_of_Fundamental_Stars

"The Fifth Fundamental Catalogue (FK5) was a 1988 update of FK4 with
new positions for the 1,535 stars. It was superseded by the
quasar-based International Celestial Reference Frame (ICRF)."

AstronomicalData["ProximaCentauri", "Declination"]

-62.6814`6.

AstronomicalData["ProximaCentauri", "RightAscension"]

14.4966`6.

AstronomicalData["ProximaCentauri", "Distance"]

3.9957169756`5.698970004336013*^16


Bob Hanlon


On Mon, Nov 12, 2012 at 3:06 AM,  <thebro95 at gmail.com> wrote:
> Hello everybody,
>
> I'm doing a programme of Positional Astronomy and I would like to know if you could help me with this command (for any star):
>
> AstronomicalData["ProximaCentaury", "Position"]
>
> It gives some axial heliocentric coordinates of the star, but I do not have any idea about where every axis points.
>
> Thank you for your help!
>



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