New ADQL Release v2.0-20081028

[Francois Ochsenbein]

Sorry Arnold, but it does not mean that it is 100% correct...
Changing the origin to another one linked to the Earth
introduces accelerations, and therefore changes in the mouvements
(proper motions); and also the directions for objets which are not
at an infinite distance are modified.

Francois

>
>Francois,
>
>this was given to us by Arnold himself.
>
>Cheers,
>P.
>
>On 28/10/2008, at 20:13, Francois Ochsenbein wrote:
>
>>
>> Pedro,
>>
>> Stricly speaking, ICRS is barycentric -- not geocentric
>> (changing the origin introduces periodic variations).
>> Specifying 'ICRS GEOCENTER' looks incorrect for me --
>> but to be sure I would suggest to ask this question
>> to astrometrists.
>>
>> --Francois
>>
>> =
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>> ======================================================================
>> Francois Ochsenbein       ------       Observatoire Astronomique de  
>> Strasbourg
>>   11, rue de l'Universite F-67000 STRASBOURG       Phone: +33-(0)390  
>> 24 24 29
>> Email: francois at astro.u-strasbg.fr   (France)         Fax: +33- 
>> (0)390 24 24 32
>> ======================================================================
>
>
>
>_________________________________________
>Pedro Osuna Alcalaya
>
>European Space Agency (ESA)
>European Space Astronomy Centre (ESAC)
>Science Operations Department (SCI-O)
>Science Archives and Computer Support Engineering Unit (SCI-OE)
>e-mail: Pedro.Osuna at esa.int
>Tel + 34 91 813 13 14    Fax: +34 91 813 11 72
>_________________________________________
>European Space Astronomy Centre (ESAC)
>P.O. Box 78
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>
>
>
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================================================================================
Francois Ochsenbein       ------       Observatoire Astronomique de Strasbourg
   11, rue de l'Universite F-67000 STRASBOURG       Phone: +33-(0)390 24 24 29
Email: francois at astro.u-strasbg.fr   (France)         Fax: +33-(0)390 24 24 32
================================================================================