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Help with the position of Charon in Pluto's sky
marsbug
post Sep 18 2015, 02:31 PM
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Hi all, I hope this isn't out of place, mods please move or delete this if it is. I've started doing an acrlyic landscape painting set on the 'coast' of Tombargh Regio, Pluto (below - very much a work in progress). I want to get the sky accurate if I can, but I'm having trouble working out where Charon would be in the sky from a give location. Can anyone help? I'm having trouble even figuring out where the sub-Charon point is on the most recent images, wich would at least give me a start point.....

Attached File  Glaciers_of_Pluto__4_.tif ( 663.51K ) Number of downloads: 378


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ZLD
post Sep 18 2015, 02:46 PM
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Unfortunately, Charon is tidally locked to the opposite side of Pluto so from that view of the region, you would never see Charon. However, its also a painting and sometimes factual accuracy can be ignored for artistic intention. wink.gif

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stevesliva
post Sep 18 2015, 04:53 PM
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Right, way back in planning the flyby, the geometry for allowing both Pluto and Charon to eclipse earth as seen from NH was the paramount concern for radio science, so Charon ended up being on the opposite side and not particularly close.
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marsbug
post Sep 18 2015, 05:17 PM
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Never mind, I do an awseome Milky Way! Thanks guys :smile.gif


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JohnVV
post Sep 20 2015, 04:36 AM
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a few days old but...

i like using Celestia and the NAIF spice orbits to get a look at where things will be and when

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like this screenshot

--- added later

or this
the first image is near close approach
then from the surface AT the same time as the first image
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ZLD
post Sep 20 2015, 04:46 AM
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Maybe I'm a tad inexperienced with Celestia, but I haven't seen that side bar before John. Is that an addon and if so, where could I get that?


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JohnVV
post Sep 20 2015, 05:08 AM
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one of the advantages of being the person that checks NEW addons
( the old ones are ??? iffy sometimes on linux )

the extra on screen tools are the LUA tools , not new and you need the LAST version of LUA the current lua it a bit too new .
the gui is the last SVN-5229 using the QT4 GUI
not the gtk / glut of years past


the lua tools
"Lua Edu Tools 1.2 Beta8 (for Celestia 1.6.0)"
http://celestiamotherlode.net/catalog/utilities.html

on linux there is a minor bug that got through

copy a few icons to a new folder , no biggie
( for that compass in the bottom center )

right now the only forum is
http://www.celestialmatters.org/

and the upcoming release of "Celestia SCI ence "
spice and naif short tutorials are
http://forum.celestialmatters.org/viewforu...dc0fc3044c1f821
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