Asteroid Shape model collection
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Topic authortrappistplanets
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Asteroid Shape model collection
(repurposing this thread to something more useful than "Asteroid Apophis 2021 3d shape model" topic)
post any known asteroid meshes you have here
here are some that i know of
https://3d-asteroids.space/
and
https://www.thingiverse.com/search?q=asteroids&type=things&sort=relevant
post any known asteroid meshes you have here
here are some that i know of
https://3d-asteroids.space/
and
https://www.thingiverse.com/search?q=asteroids&type=things&sort=relevant
Last edited by trappistplanets on 24.05.2021, 11:15, edited 2 times in total.
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Owner of "The Grand Voyage" addon series
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LukeCEL once contacted Marina Brozović, the main author of the 2018 study where the updated Apophis shape models were presented. She sent one of those models, which Luke then uploaded to the Discord server. I have attached the .obj file here.
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Topic authortrappistplanets
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POG, THANKS PEDRO!pedro_jg wrote:LukeCEL once contacted Marina Brozović, the main author of the 2018 study where the updated Apophis shape models were presented. She sent one of those models, which Luke then uploaded to the Discord server. I have attached the .obj file here.
Added after 31 minutes 19 seconds:
converted it into a cmodpedro_jg wrote:LukeCEL once contacted Marina Brozović, the main author of the 2018 study where the updated Apophis shape models were presented. She sent one of those models, which Luke then uploaded to the Discord server. I have attached the .obj file here.
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Owner of "The Grand Voyage" addon series
Collaborating with Dangerous_safety for the still developing Cer system
Owner of "The Grand Voyage" addon series
Collaborating with Dangerous_safety for the still developing Cer system
I also have a model of the near-Earth asteroid (214869) 2007 PA8. This one I also got from emailing Marina Brozović, who was the lead author of this paper: "Goldstone radar evidence for short-axis mode non-principal-axis rotation of near-Earth asteroid (214869) 2007 PA8".
The format of the file is the same as OBJ, so just change the extension to OBJ.
The format of the file is the same as OBJ, so just change the extension to OBJ.
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2007_pa8.wf.zip
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Topic authortrappistplanets
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thanks, i should rename this topic to asteroid meshes galleryLukeCEL wrote:I also have a model of the near-Earth asteroid (214869) 2007 PA8. This one I also got from emailing Marina Brozović, who was the lead author of this paper: "Goldstone radar evidence for short-axis mode non-principal-axis rotation of near-Earth asteroid (214869) 2007 PA8".
luke, do you have a model for this rock?
https://lightsinthedark.files.wordpress.com/2017/05/pia21597.gif?w=1000
i have been looking for a mesh for that rock but i was unsuccessful
Last edited by trappistplanets on 24.05.2021, 16:22, edited 1 time in total.
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Shape models are sometimes hard to come by. I'll start by posting a few links here, and hope to add more over time.
While these sources are also used by the 3D Asteroid Catalogue, I'm listing them for completeness:
-Database of Asteroid Models from Inversion Techniques (DAMIT): https://astro.troja.mff.cuni.cz/projects/damit/
-Models derived from radar observations: https://echo.jpl.nasa.gov/asteroids/shapes/shapes.html
-Asteroids imaged by VLT/SPHERE: https://observations.lam.fr/astero/
While these sources are also used by the 3D Asteroid Catalogue, I'm listing them for completeness:
-Database of Asteroid Models from Inversion Techniques (DAMIT): https://astro.troja.mff.cuni.cz/projects/damit/
-Models derived from radar observations: https://echo.jpl.nasa.gov/asteroids/shapes/shapes.html
-Asteroids imaged by VLT/SPHERE: https://observations.lam.fr/astero/
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Topic authortrappistplanets
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sweet
is it possible for anyone to contact the maker of the models shown in this paper to send us the meshes
https://www.hou.usra.edu/meetings/lpsc2018/pdf/1053.pdf
there so NICE
Added after 20 minutes 5 seconds:
Added after 4 minutes 27 seconds:
nevermind
Added after 2 hours 18 minutes:
is it possible for anyone to contact the maker of the models shown in this paper to send us the meshes
https://www.hou.usra.edu/meetings/lpsc2018/pdf/1053.pdf
there so NICE
Added after 20 minutes 5 seconds:
pedro_jg wrote:-Models derived from radar observations: https://echo.jpl.nasa.gov/asteroids/shapes/shapes.html
i can't seem to download anything from those 2 sites, when i click on object name (and shape model file for tlt/sphere) it gives me gibborishpedro_jg wrote:-Asteroids imaged by VLT/SPHERE: https://observations.lam.fr/astero/
Added after 4 minutes 27 seconds:
nevermind
Added after 2 hours 18 minutes:
do you have code for 2007 PA8?LukeCEL wrote:I also have a model of the near-Earth asteroid (214869) 2007 PA8. This one I also got from emailing Marina Brozović, who was the lead author of this paper: "Goldstone radar evidence for short-axis mode non-principal-axis rotation of near-Earth asteroid (214869) 2007 PA8".
There is a limit to how far we can travel into the stars.
Owner of "The Grand Voyage" addon series
Collaborating with Dangerous_safety for the still developing Cer system
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- SevenSpheres
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trappistplanets wrote:do you have code for 2007 PA8?
Here is a tutorial for making your own asteroid ssc files. Data for this specific asteroid can be found here.
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Celestia versions: 1.5.1, 1.6.1, 1.6.2, 1.7.0, and some unofficial versions like Celestia-ED
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okaySevenSpheres wrote:Here is a tutorial for making your own asteroid ssc files. Data for this specific asteroid can be found here.
i made the rock
Code: Select all
"2007 PA8" "Sol"
{
Class "asteroid"
Mesh "2007pa8.cmod"
Texture "asteroid.jpg"
Radius 1.4
EllipticalOrbit
{
Epoch 2459742.149762573496
Period 4.80
SemiMajorAxis 2.845848909322017
Eccentricity 0.6539302342368805
Inclination 1.994453383607742
AscendingNode 141.3764304892597
ArgOfPericenter 293.8678642170708
MeanAnomaly 248.7999781566583
}
Albedo 0.4
RotationPeriod 102.24
}
needed mesh
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Owner of "The Grand Voyage" addon series
Collaborating with Dangerous_safety for the still developing Cer system
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Hey everyone, sorry for the late reply. Here are some shape models of 624 Hektor from Josef Ďurech (via Franck Marchis whom I emailed).
Models A, B, and C are the convex lightcurve models, a contact binary model, and an separate binary model respectively.
Models A, B, and C are the convex lightcurve models, a contact binary model, and an separate binary model respectively.
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Hektor_models.zip
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Topic authortrappistplanets
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witch model will be the most accurate?LukeCEL wrote:Models A, B, and C are the convex lightcurve models, a contact binary model, and an separate binary model respectively.
Added after 8 hours 48 minutes:
the halley model on 3d asteroid catalog is good, but it does not fully line up with the Vega images correctly so i fixed it a bit
it allines with giotto and vega images very nicely now
below is the download link for the cmod mesh
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on the model, where would center of mass be because its currently centured on lobe 2 and that is not the center of massLukeCEL wrote:Not sure which of the models is the most accurate, but I think Hektor is known to be a contact binary, in which case Model B would be the closest to reality.
it needs to be on the center of mass so it rotates correctly in celestia
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trappistplanets wrote:it needs to be on the center of mass so it rotates correctly in celestia
I'm not sure where the actual center of mass is, but you could probably get it to rotate about whatever point you want by using the MeshCenter parameter.
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Topic authortrappistplanets
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can you send me the paper you saw that model in, there should be a figure comparing the shape model with radar and synthetic dataLukeCEL wrote:I'm not sure where the actual center of mass is, but you could probably get it to rotate about whatever point you want by using the MeshCenter parameter.
(ie, somthing like this https://ars.els-cdn.com/content/image/1-s2.0-S0019103513002285-gr1.jpg (its bennu)
if there is a figure like that, than i can figure out the real center of the object myself, because the fig also shows rotational axes
There is a limit to how far we can travel into the stars.
Owner of "The Grand Voyage" addon series
Collaborating with Dangerous_safety for the still developing Cer system
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The source of the Hektor shape model is https://arxiv.org/abs/1402.7336
Now for some other shape models, another website from which they can be obtained is the "Interactive service for asteroid models" (ISAM). While most of these come from the DAMIT database (which is licensed as CC BY 4.0), there are a few unique ones in there. The license isn't entirely clear to me though; while there's a small CC BY-NC-ND 3.0 badge on the page (which would most likely disallow converting the models for Celestia), I'm not sure if this only applies to the renderings or to the mesh files as well. The English version of the license page would suggest that the only restriction is on commercial use, and the Polish version suggests something along the same lines.
The mesh files can be downloaded by selecting an asteroid from the dropdown menu on the left. A couple of tables should then appear, the bottom one having an "additional information" column with an [obj] link.
Among the "unique" models I was talking about, some of them are for the asteroids featured on the following publications:
Bartczak et al. (2014) "A new non-convex model of the binary asteroid 90 Antiope obtained with the SAGE modelling technique"
Marciniak et al. (2018) "Photometric survey, modelling, and scaling of long-period and low-amplitude asteroids"
Podlewska-Gaca et al. (2020) "Physical parameters of selected Gaia mass asteroids"
Now for some other shape models, another website from which they can be obtained is the "Interactive service for asteroid models" (ISAM). While most of these come from the DAMIT database (which is licensed as CC BY 4.0), there are a few unique ones in there. The license isn't entirely clear to me though; while there's a small CC BY-NC-ND 3.0 badge on the page (which would most likely disallow converting the models for Celestia), I'm not sure if this only applies to the renderings or to the mesh files as well. The English version of the license page would suggest that the only restriction is on commercial use, and the Polish version suggests something along the same lines.
The mesh files can be downloaded by selecting an asteroid from the dropdown menu on the left. A couple of tables should then appear, the bottom one having an "additional information" column with an [obj] link.
Among the "unique" models I was talking about, some of them are for the asteroids featured on the following publications:
Bartczak et al. (2014) "A new non-convex model of the binary asteroid 90 Antiope obtained with the SAGE modelling technique"
Marciniak et al. (2018) "Photometric survey, modelling, and scaling of long-period and low-amplitude asteroids"
Podlewska-Gaca et al. (2020) "Physical parameters of selected Gaia mass asteroids"
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"(which would most likely disallow converting the models for Celestia)"pedro_jg wrote:Now for some other shape models, another website from which they can be obtained is the "Interactive service for asteroid models" (ISAM). While most of these come from the DAMIT database (which is licensed as CC BY 4.0), there are a few unique ones in there. The license isn't entirely clear to me though; while there's a small CC BY-NC-ND 3.0 badge on the page (which would most likely disallow converting the models for Celestia), I'm not sure if this only applies to the renderings or to the mesh files as well. The English version of the license page would suggest that the only restriction is on commercial use, and the Polish version suggests something along the same lines.
#1 why do they have that as a copy right...
and #2 if that is the case than why post them here?
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Owner of "The Grand Voyage" addon series
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