Comment 11 for bug 1124221

Hello Worachate,

On 16 February 2013 05:42, Worachate Boonplod <email address hidden>wrote:

> An example - Saturn as seen from Bangkok.
>
> 1996 Jan 1 00:00 UT
> ==================
> DE406 (J2000.0) : 23h 24m 33.26s / -06° 07' 16.6"
> Stellarium (J2000.0) : 23h 24m 33.3s / -06° 07' 16.6"
> (very close - that's good)
>
> DE406 (apparent) : 23h 24m 20.78s / -06° 08' 35.1"
> Stellarium (apparent) : 23h 24m 21s / -06° 08' 36"
> (very close - that's good)
>

SkyMap Pro 9 (using VSOP8, like Stellarium):
Apparent topocentric coordinates for the epoch of date:
Right ascension: 23h 24m 21.42s
Declination: -6° 8' 30.8"

1026 Jan 1 00:00 UT
> ==================
> DE406 (J2000.0) : 00h 59m 32.10s / +03° 44' 57.2"
> Stellarium (J2000.0) : 00h 59m 32.0s / +03° 44' 56.3"
> (very close - that's good)
>
> DE406 (apparent) : 00 h 09m 40.80s / -01° 36' 41.4"
> Stellarium (apparent) : 00h 09m 31s / -01° 35' 21"
> (too far apart - needs to fix)
>

SkyMap Pro 9.0:
Apparent topocentric coordinates for the epoch of date:
Right ascension: 0h 9m 41.20s
Declination: -1° 36' 38.3"

This SkyMap is closer to DE406, while SkyMap and Stellarium use same
ephemeris...

Perhaps worth another bug report (as I think it has no relation). There
might be some relation with the Precession of the equator value (but I want
to check that after the proper motion of the stars looks better).

All the best,

Victor