View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0001150 | SkyChart | Other | public | 13-03-16 15:08 | 14-03-29 17:55 |
| Reporter | Pierre godfrin | Assigned To | Patrick Chevalley | ||
| Priority | normal | Severity | minor | Reproducibility | always |
| Status | closed | Resolution | fixed | ||
| Platform | x86 | OS | Windows | OS Version | XP |
| Target Version | 3.10 | Fixed in Version | 3.9 SVN | ||
| Summary | 0001150: écart sur l'heure de culmination des objets | ||||
| Description | Bonjour, Je remarque que l'heure de culmination des objets,pour ma longitude, diffère de quelques minutes de celles que je peux calculer à partir d'un temps sidéral identique à celui de CdC2. Idem pour CDC1.Qu'en est-il SVP? Merci d'avance. Pierre | ||||
| Tags | No tags attached. | ||||
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Est-ce que vous pouvez être un peu plus précis et donner des exemples? C'est quoi cdc1 et cdc2 ? Car je ne vois pas de problème. Par exemple Sirius pris maintenant depuis Genève: Extrait de l'affichage après un clic sur Sirius: 2013-03-16 21h22m27s ( CET ) Apparente AR: 06h45m44.913s Heure sidérale locale:08h25m13s Culmination: 19h43m Petit calcul : 6h45m45s - 8h25m13s = -1h39m28s 21h22m27s - 1h39m28s = 19h42m59s ~= 19h43m Pour les objets mobiles le programme fait bien sur une interpolation basée sur leur déplacement. (dans l'exemple ci-dessus j'ai pris un raccourcis car l'angle horaire est faible, pour être précis il faut le diviser par 1.002738 avant la dernière soustraction puisqu'on parle ici de rotation sidérale) |
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Sorry, I first missed the English language recommendation. Let's go ,that could be funny... versions 2.76 and 3.6 of Skychart are dubbed respectively CDC1, CDC2. So,here are 2 occurences, for instance, where slight differences are found, excepted mistake of my own: M81, Geneva, on 16/03/13 21h 22mn 27s CET. Computed culmination time: 22h52mn 39s; CDC2 delivers 22h 58mn; CDC1: 22h57mn M81, "my home"(2°21'50" E)on 16/03/13 21h 22mn 27s CET. Computed culmination time: 22h 7mn 32s Skychart: 22h13mn CDC1 22h12mn Thanks for your opinion on the problem and your very good job. |
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This is fixed by revision 2480: http://sourceforge.net/p/skychart/code/2480 I was missing to adjust the date for circumpolar objects, so some time the transit was for the next or previous day. But I still have an offset again you values. For M81, Geneva, on 16/03/13, I find : Culmination: 22h54m This is coherent with Steve Moshier's Ephemeris Program (aa) that give the following value: local meridian transit 2013 March 16 Saturday 21h 53m 44.549s UT |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 13-03-16 15:08 | Pierre godfrin | New Issue | |
| 13-03-16 22:01 | Patrick Chevalley | Note Added: 0002479 | |
| 13-03-16 22:01 | Patrick Chevalley | Status | new => feedback |
| 13-03-17 10:03 | Patrick Chevalley | Note Edited: 0002479 | |
| 13-03-21 22:13 | Pierre godfrin | Note Added: 0002481 | |
| 13-03-21 22:13 | Pierre godfrin | Status | feedback => new |
| 13-03-29 14:23 | Patrick Chevalley | Note Added: 0002484 | |
| 13-03-29 14:23 | Patrick Chevalley | Assigned To | => Patrick Chevalley |
| 13-03-29 14:23 | Patrick Chevalley | Status | new => resolved |
| 13-03-29 14:23 | Patrick Chevalley | Resolution | open => fixed |
| 13-03-29 14:23 | Patrick Chevalley | Fixed in Version | 0.3.0 => 3.9 SVN |
| 13-03-29 14:23 | Patrick Chevalley | Target Version | 0.3.0 => 3.10 |
| 14-03-29 17:55 | Patrick Chevalley | Status | resolved => closed |
