Comment 36 for bug 1124221

The error is increasing over time (in -2013 the error is quite large a few
degrees! So not really precise enough). I find it still is strange that it
is not possible to get the value for J1991.25 correct, J2000.0 is correct!
If that is not correct, then -2013 will certainly be wrong.

All the best,

Victor

On 21 April 2013 11:54, Victor Reijs <email address hidden> wrote:

> Hello Alexander,
>
> Thanks for this 0.12.1 release. I see the same DE difference still in
> J1991.25 as reported on March 8th (a difference of 0.8" in DE, which is
> large-ish as that is the basic primary resource data). Will check, later on
> the day, if this error is proportional to the date.
>
> All the best,
>
>
> Victor
>
>
> On 21 April 2013 09:47, Alexander Wolf <email address hidden> wrote:
>
>> ** Changed in: stellarium
>> Status: Fix Committed => Fix Released
>>
>> --
>> You received this bug notification because you are subscribed to the bug
>> report.
>> https://bugs.launchpad.net/bugs/1124221
>>
>> Title:
>> Stellarium uses Hypparcos star coordinates from J2000.0 instead of
>> J1991.25
>>
>> Status in Stellarium:
>> Fix Released
>>
>> Bug description:
>> It looks that the RA/DE(J2000) on date/time 2000/1/1 12:00 (aka
>> J2000.0) in
>> Stellarium is precisely the value that is defined in Hipparcos (which
>> is defined at J1991.25).
>> Example: in
>> http://www.rssd.esa.int/index.php?project=HIPPARCOS&page=multisearch2 ,
>> Sirius is in Hipparcos catalogue (being J1991.25) at:
>> H| 32349| |06 45 09.25|-16 42 47.3
>>
>> If I look at Stellarium on Date/time 1991/1/1 18:00 GMT (J1991.25) I
>> get:
>> RA/DE (J2000): 6h45m9.6s/-16°42'35.8"
>>
>> And on date/time 2000/1/1/ 12:00 GMT (J2000.0)I get in Stellarium:
>> RA/DE (J2000): 6h45m9.3s/-16°42'47.3"
>>
>> I am using 0.12.0 and 0.12.1, Windows XP Pro, SP3,
>>
>> See also: <email address hidden>
>>
>> To manage notifications about this bug go to:
>> https://bugs.launchpad.net/stellarium/+bug/1124221/+subscriptions
>>
>
>