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Re: XEphem 4.1.0


 

Good evening,
The structure of this file is magic to me but it works, thanks! :)

I needed some faint-star catalog (~20mag), so I played about gsc 2.3 and found post by Piero Bradley about this:
/g/xephem/topic/new_csv_format_for_downloaded/18594592?p=,,,20,0,0,0::recentpostdate/sticky,,,20,2,40,18594592,previd=1442322036000000000,nextid=1413821172000000000&previd=1442322036000000000&nextid=1413821172000000000
Following this lead a modify gscnet.c to work again with GSC 2.3.
I'm not "github-talkative" so I attached diff file with favour to Brandon to make a commit.

W dniu 20.09.2021 o?18:46, Serge Montagnac pisze:

Good evening ?ukasz, ... and Brandon ?
I didn't not work to much to find the bloody thing ... I suspected the *line 1 of uranus.2040* again ...
( the 7th field containing 131 should terminate at column 28 but was 1 space more to the right ...? so 3 more offsets appeared ...)
I recommend you to put my uranus.2040 attached file into your auxil directory (do not try editing the old bad one!)
For the trouble, I join my check done on IMCCE planets service and the same in pdf with XEphem (your observation of 2021-09-14)
*For Brandon*: could you be kind to commit the file as soon as possible on the Git repos or do you prefer me todo
a git pull request ?
On 20/09/2021 15:02, Serge Montagnac wrote:
Hi ?ukasz,
I agree with you an I'll contact Valery Lainey for closer control of the data polynomes (we had some troubles with fortran tables formating ...)
We play with high precision ephemerids so ... ?
... give us 3 or 4 days.
Best regards,
Serge.

On 19/09/2021 23:03, ?ukasz 'e2rd' Sanocki wrote:
Hello
I think there is serious bug in Uranus moons data (code?). While Titania and Oberon positions seems to be accurate, then other 3 moons are in random place - especially Miranda is faar away from planet...
Look at attachement screenshot and photo taken by me at 14.09.2021 22:40 UT. For example stellarium shows correct data.

btw, I've updated debian package for Ubuntu/Debian


W dniu 14.09.2021 o?14:44, Martin Federspiel pisze:
Hi to everyone, who contributed to version 4.1.0, and a huge thank you! That updates XEphem significantly. The quality of the updated positions of the Galilean moons can be checked e.g. by comparing Christopher Go's series of images of a triple transit of Callisto, Ganymede, and Europa on Aug 15th, 2021 (see ) with XEphem. During the transit there was also an occultation of Europa by Ganymede and a partial eclipse of Europa by Ganymede a few minutes later. All that is well reproduced by XEphem 4.1.0, whereas earlier versions didn't get the mutual events well.

Since openssl support is now included in 4.1.0, I had to install libssl-dev on my Ubuntu 20.04 system to get 4.1.0 compiled.

Thanks again and best regards,

Martin Federspiel
--
Serge Montagnac + GPG Key 0xDF083D7B +
Nature, Not Human Activity, Rules the Climate.
--
?ukasz Sanocki

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