Help Shape the Future of Space Exploration

Join The Planetary Society Now  arrow.png

Join our eNewsletter for updates & action alerts

    Please leave this field empty
Blogs

Mattias Malmer

New Churyumov-Gerasimenko Shapemodel!

Posted by Mattias Malmer

12-12-2014 9:00 CST

Topics: Rosetta and Philae, pretty pictures, comets, amateur image processing, comet Churyumov-Gerasimenko, 3D

Here is my latest shapemodel of comet 67P Churyumov-Gerasimenko:

Shapemodel of Comet 67P/Churyumov–Gerasimenko

ESA / MPS / UPD / LAM / IAA / RSSD / INTA / UPM / DASP / IDA / Mattias Malmer

Shapemodel of Comet 67P/Churyumov–Gerasimenko

It is as good as I believe can be done with the current limited data set of images that have been publicly released by the Rosetta mission. It was built by correlating 150 surface features over 120 NavCam and OSIRIS frames. Each image has had its viewing geometry reconstructed using sparse bundle adjustment (according to the technique explained in this blog post). Then, a select number of images were used to derive dense depth-from-stereo data. To combat the noise in the stereo data, I used shape-from-shading to create high-resolution local data.

For the parts of the comet currently in darkness I have used images of the limb against the slightly brighter dust cloud to constrain the volume that the surface is inside.

I have smoothed out the “unknown” areas to make the model a bit prettier.

There are areas with artifacts and seams, especially around the neck. I have not fixed them because the model is continuously made obsolete by the steady stream of new images being released.

As soon as new data becomes available I try to update the model. And I will post a new one here if there are meaningful changes to the model.

The model is Copyright Mattias Malmer CC-BY-SA 3.0

DOWNLOAD MODEL IN OBJ FORMAT

 
See other posts from December 2014

 

Or read more blog entries about: Rosetta and Philae, pretty pictures, comets, amateur image processing, comet Churyumov-Gerasimenko, 3D

Comments:

miguez: 12/12/2014 03:44 CST

Mattias, this is a fantastic model, thank you so much for taking the time to do this!

Leave a Comment:

You must be logged in to submit a comment. Log in now.
Facebook Twitter Email RSS AddThis

Blog Search

Essential Advocacy

Our Advocacy Program provides each Society member a voice in the process.

Funding is critical. The more we have, the more effective we can be, translating into more missions, more science, and more exploration.

Donate

Featured Images

NGC 4100
The Flaming Star Nebula (IC 405)
LDN 604 and GGD 30
Schiaparelli backshell and parachute landing location from HiRISE in color
More Images

Featured Video

The Planetary Post - Carl Sagan's Pale Blue Dot

Watch Now

Space in Images

Pretty pictures and
awe-inspiring science.

See More

Join The Planetary Society

Let’s explore the cosmos together!

Become a Member

Connect With Us

Facebook, Twitter, YouTube and more…
Continue the conversation with our online community!