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Re: GRS longitude syst.II
The jupiter.1020 bdl file is now out of date so the values are being computed using Meeus copyright 1982. The GRS has migrated several degrees away from the model built at that time.
By Elwood Downey · #4022 ·
GRS longitude syst.II
Greetings, Using the "official" JUPOS value I was unable to get accurate transit times (compared with S&T predictions, etc.). There seems to be an "offset", since using ~29¡ã (instead of the current
Re: Some confusion concerning INDI device names
Thanks for the information. The key turned out to be installation of the base INDI package so that I could run indi_getprop to see the names of the relevant configuration parameters. I need to do a
By M. Collins · #4020 ·
Re: Some confusion concerning INDI device names
Hello, Please see section 5.8 of the XEphem Reference Manual. <https://xephem.github.io/XEphem/Site/help/xephem.html#mozTocId365647> I will paraphrase here. The INDI Control Panel doesn't "know"
By Elwood Downey · #4019 ·
Some confusion concerning INDI device names
I have an Ubuntu-20 system running INDIGO server connected to a Losmandy GM8/Gemini mount. INDIGO provides legacy support for INDI devices, and XEphem connects to the emulated server at localhost:7624
By M. Collins · #4018 ·
Re: Strange jumps of Pluto between 2246 and 2247B (fwd)
Hi, Attached are 2 plots of the same trail, one with the old elements, one with the new fixed ones (ie perihelion epoch, and n) diff --git a/libastro/plans.c b/libastro/plans.c index
By dulle · #4017 ·
Re: Strange jumps of Pluto between 2246 and 2247B (fwd)
Happily, these elements sit in the raw C code, which is impervious to any whitespace sensitivity. So they should not be haunted by any format problems. I am reverting the recent commit and restoring
By Brandon Rhodes · #4016 ·
Re: Strange jumps of Pluto between 2246 and 2247B (fwd)
Ouuups ... I think you are on the good way ! Reference done from my early troubles of Chebichev coeff of planets 2020-2040 : All the format aspect (columns, width, precision,
By Serge Montagnac · #4015 ·
Easy compile of XEphem on Mac using "brew"?
Good morning, XEphem folks! It came to my attention that the free ¡°GitHub Actions¡± build service, which can be configured to run each time there¡¯s a new commit, now supports macOS. I¡¯ve just
By Brandon Rhodes · #4014 ·
Re: Strange jumps of Pluto between 2246 and 2247B (fwd)
Hi, If i am not mistaken there is a confusion in the new code between elements reference epoch and perihelion epoch. Plus, daily motion truncated to 2 significant digits is probably
By dulle · #4013 ·
Re: Strange jumps of Pluto between 2246 and 2247
Dear friends, Indeed, 2247/10/1 is the date the jump occurs for me. I am impressed that you found out so quickly! Another basic question: is there an easy way to activate the Inertial frame by
By Maxime GOMMEAUX · #4012 ·
Re: Strange jumps of Pluto between 2246 and 2247
Many thanks for your research, Brandon. Since 2248 uses the new elements and this date produces wildly incorrect positions, I would suggest reverting back to the older elements. For reference, I ran
By Elwood Downey · #4011 ·
Re: Strange jumps of Pluto between 2246 and 2247
[email protected]> wrote: I have just tested and can confirm that the above-linked commit is the one that introduced the discontinuity. Apparently this new elliptical orbit for Pluto does not
By Brandon Rhodes · #4010 ·
Re: Strange jumps of Pluto between 2246 and 2247
wrote: Back in July, someone offered to update the Pluto orbital elements: https://github.com/XEphem/XEphem/issues/2#issuecomment-887460576 Here's the code update they
By Brandon Rhodes · #4009 ·
Re: Strange jumps of Pluto between 2246 and 2247
Hello Maxime, Two comments: 1. I confirm your report using XEphem 4.0.1 but I can also report the?jumping does NOT happen with my legacy 3.7.6 so *SOMEBODY BROKE SOMETHING*. 5/16/2247 00:00 UTC?
By Elwood Downey · #4008 ·
Strange jumps of Pluto between 2246 and 2247
Dear friends of XEphem, I am very happy that the improving pandemic situation has enabled me to resume my practical courses with XEphem in a real room with real Bachelor students... I haven however,
By Maxime GOMMEAUX · #4007 ·
Re: Difficulty with OSX builds post Xephem-3.7.7
that worked for 10.5.8 and xephem 4.1.0 thanks elwood
By Karl Oestreich · #4006 ·
Re: Difficulty with OSX builds post Xephem-3.7.7
You need -lXp, just as in my post: Now I will say no more.
By Elwood Downey · #4005 ·
Re: Difficulty with OSX builds post Xephem-3.7.7
CFLAGS = $(LIBINC) $(CLDFLAGS) -O2 -Wall -I$(MOTIFI) -I/opt/X11/include < LDFLAGS = $(LIBLNK) $(CLDFLAGS) -L$(MOTIFL) -L/opt/X11/lib < XLIBS = -lXm -lXt -lXext -lXmu -lX11 the above part has no value
By Karl Oestreich · #4004 ·
Re: Difficulty with OSX builds post Xephem-3.7.7
Try using the changes I showed in my diff, you're still not doing it the way I did.
By Elwood Downey · #4003 ·