New Asteroids models and textures

[jestr]

I have given the asteroids listed in solarsys.ssc (or asteroids.ssc) a makeover.

I have made two different versions,if you have Celestia v1.3.1 installed you should download the 3ds version here
http://celestiamotherlode.net/creators/jestr/MajorAsteroids_131.zip

The second version is with cmod models of the asteroids which can only be used in the more recent pre versions of Celestia,get this one here
http://celestiamotherlode.net/creators/jestr/MajorAsteroids_132pre10_or_later.zip
The Ida texture is a little bit greyer than the one I posted here last week.I have included both JPG and DDS versions of the textures in both packs,and you should delete the ones you dont want to use,as it may cause problems otherwise.Hope you like them, Jestr

[TERRIER]

This totally ROCKS

[Bob Hegwood]

Mr. Jestr?

You *are* the MAN when it comes to models and textures for same.
When do you sleep?

I thought my tours took up a lot of my time, but I *do* manage to
eat a meal now and then. Do you *ever* rest?

Many thanks once again for some absolutely stunning work.

Take care, Bob

[jestr]

Thanx for the kind words guys,I'm totally addicted to this program-I love doing this stuff,glad to hear you like it,Jestr

[rthorvald]

I have given the asteroids listed in solarsys.ssc (or asteroids.ssc) a makeover.

Thank you! This is... Great!

-rthorvald

[Jeam Tag]

I have given the asteroids listed in solarsys.ssc (or asteroids.ssc) a makeover.

Superb, Jestr. Just for fun, did you inspired by these models? http://www.serradesignsinc.com/ast_models.htm
Jeam, on the way to refresh his SolarSys pages with your new addons... Question: what about the ancient ones, what are those avaible somewhere (I'm thinking about lot of + or - fictitious meshes and textures for many solar system little bodies)?...

[danielj]

Besides Ida and Gaspra,which of these textures are more realistic(i.e,based in images of telescopes or probes)?

[jestr]

Thanks Jeam,I wasnt inspired by the Serra models,but I kept coming across them when I was trying to find images of these asteroids.What ancient ones are you on about?
Daniel,the textures for Gaspra,Ida (and Dactyl),Mathilde and of course Eros all include actual photos from Near or Galileo probes.The rest is mostly fiction,I tried to get the colours roughly right,from the spectral data available (thanks Grant).The models of Toutatis,Geographos,Kleopatra,1998 KY26,Bacchus,Golevka,and Castalia,have been made (originally not by me)from radar images of them.Ceres,Pallas,and Juno are totally fictitious.Cheers Jestr

[TERRIER]

Jeam,

Great link for those Serra asteroid sculptures, I love 'em.
I've got to get me a couple of those. They'd make a great pair of book-ends to my humble astronomy library.

Jestr,
itokawa

and...

ML14


Has anyone made these available for Celestia ?, I haven't had chance to check yet. It looks like they've both been studied very closely.

Regards,
TERRIER

[maxim]

Nice models - and these allow for alternate textures.
I remember some older releases (minor moons, major moons, comets centaurs...) where the textures were fixed in the model definition and no texture change was possible - will we get updated versions of these??

maxim

[jestr]

The moons should already be possible to change textures,if you dont have the latest versions,the Minor moons are here
http://celestiamotherlode.net/creators/jestr/Alt%20MinorMoons.zip
and Major moons here
http://celestiamotherlode.net/creators/jestr/SolarsysMoons.zip
The other asteroids,centaurs,atens,binaries etc need a makeover too but the ssc's for these will all need changing to point to the new textures,and we have no real definitive list of which asteroids to include-and which ones would go in the new asteroids.ssc or outersys.ssc, I guess its all fairly arbitrary,but it would be nice to make some new textures for the different spectral types (though I know the data is sketchy),there is no reason why we could not make for instance 70 percent of all asteroids C-type as they are reckoned to be ,and have more S-types in the inner solar system,with more icy bodies amongst the outersys.I am open to suggestions here,Jestr

[Jeam Tag]

The moons should already be possible to change textures,if you dont have the latest versions,the Minor moons are here
http://celestiamotherlode.net/creators/jestr/Alt%20MinorMoons.zip
and Major moons here
http://celestiamotherlode.net/creators/jestr/SolarsysMoons.zip

OK, Jestr, are they final versions? I remenber I've got some variant versions some month ago on your different pages/ftp and so on I'll update my catalog pages about Solar Sys. (already add your main asteroids)

The other asteroids,centaurs,atens,binaries etc need a makeover too but the ssc's for these will all need changing to point to the new textures,and we have no real definitive list of which asteroids to include-and which ones would go in the new asteroids.ssc or outersys.ssc,

Nice: this was about those I was speaking too. This is more difficult to catalog all these little bodies, i know. But your fictional visions are great to see them running in Celestia Tell us when an update will be released.

[guest jo]

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[guest jo]

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[jestr]

Hi Jorg,As far as I know the only difference in my ssc for Eros apart from pointing to new model and textures is the RotationOffset which I altered a little (19 degrees) in order to get Near a bit closer to the landing site in the xyz.I think the difference is due to a 16 minute gap in the data,I have changed the xyz to match up with the landing site-it is tricky to get right though and is not perfect.Here's the last few lines of my XYZ for Near orbit.

Code: Select all

2451953.3188 -3.98 -4.17 -4.4
2451953.3194 -3.89 -4.16 -4.34
2451953.3201 -3.79 -4.15 -4.28
2451953.3215 -3.55 -4.12 -4.12
2451953.3229 -3.03 -4.42 -3.97
2451953.3346296297 -1.514  -4.954  -3.627   # 2001 Feb 12 20:01:52UT - landing

Whilst my code for the landing site is this

Code: Select all

Add "NEAR Shoemaker" "Sol/Eros"
 {
   Class "spacecraft"
   Mesh "near.3ds"       
   Radius 0.002
   RotationOffset 45

   Beginning 2451953.3346296297 # 2001 Feb 12 20:01:52UT - landing

   LongLat [ -278 -35 -9.976 ]
}

Hope this helps Jestr

[granthutchison]

Only the rotation sense of eros makes me wonder because NEAR orbits it in the opposite direction.

The orbit orientation changes dramatically during the approach to Eros ... if you watch in March 2000, you'll see that NEAR-Shoemaker initially orbited in the same sense as Eros' rotation. It was later manoeuvred into a polar orbit, and then into the retrograde orientation you mention.

Another thing is a quite big difference between the landing site and the end of xyz-track.
Is this normal ?

I'm still trying to sort out whether the mismatch is due to some light-travel time correction, a mismatch between Celestia's (older) rotation parameters for Eros and those established during approach, or a combination of the two. Nothing quite makes sense yet, unfortunately. Jestr's tweak to Eros isn't likely to be the whole story, although it makes things look a bit better.

Grant

[guest jo]

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[selden]

J?rg,

Celestia v1.3.2 is now available, so you might consider upgrading.

http://sourceforge.net/project/showfiles.php?group_id=21302&package_id=15061&release_id=262653

[guest jo]

deleted

[selden]

J?rg,

Don't forget that you can have more than one copy of Celestia on your system at the same time.

Rename the directory (folder) where you have Celestia now, maybe to Celestia131.

Verify that things still work:
Click on the icon for Celestia131\Celestia.exe and look around in your universe.

Install the new copy of Celestia and tell it to use the directory Celestia. It'll create the folder again and install itself there.

Move your Addons at leisure.

Cel:// URLs run the copy of Celestia that is in the folder named Celestia. If you want to change back to using your old Celestia that way, just rename the directories again: rename Celestia to be Celestia132 and rename Celestia131 to be Celestia.

Does this help?