Rev 126 - Feb 4-22, 2010 - Mimas (main target), Tethys, Iapetus, Calypso and mutual events too Options

[Guest_2of7_*]

Hi everyone! This is my first post: usually I read but I don't write (I'm a bit slow to write in English!!! ).

Of all the missions in progress, I follow with particular interest the Cassini mission.

On February 13, 2010, Cassini flew by Saturn's moon Mimas, coming as close as 9.500 kilometers.

Pending other NASA's images, here some of mine processed for Lunar Explorer Italy:

N00151541-60 MIMAS CL1 and CL2 filter mosaic

http://www.flickr.com/photos/lunexit/4362422472/

Herschel Crater (IR1, GRB, UV filter)

http://www.flickr.com/photos/lunexit/4361704219/sizes/o/

Mimas in front of Saturn - False and natural color

http://www.flickr.com/photos/lunexit/4361885853/sizes/o/

This post has been edited by elakdawalla: Feb 25 2010, 05:20 PM

Reason for edit: Swapped thumbnails in for full size image

[Floyd]

2of7 Welcome to UMSF. Maybe a benevolent admin can move your post and nice images from the closed thread to this one. Unlike many forums in which almost every new post is a new thread, at UMSF most posts here go into ongoing threads. I hope you are undaunted by the outcome of your first post and continue to contribute images.

[Guest_2of7_*]

Thanks Floyd. My mistake! I saw the right category but in the end I wrong!
All this, will be the fault of my English! I'm sorry... if some admin'll move the images here I would be happy

[Juramike]

Welcome to UMSF, 2of7!

[Guest_2of7_*]

thanks to the admins to have moved my post!

Hi Juramike, we wrote on flickr ... and now I am here! : )

[DrShank]

here is the global color and high-resolution map of Mimas i posted on my blog a few weeks back!
(although at 400 m resolution, this version is shown at 800 m). I will be posting some fun Rhea views later today.

The paper describing all the color maps has now been submitted for publication. In it we describe
the blue equatorial bands on the leading hemispheres of both Mimas and Tethys and show
they are due to electrons bombarding and altering the surface. The Saturn system is complicated!


http://stereomoons.blogspot.com

Attached thumbnail(s)

 

[Guest_2of7_*]

Mimas and Tethys crater:


http://www.flickr.com/photos/lunexit/4367259591/sizes/o/

....so similar and different at the same time!

This post has been edited by elakdawalla: Feb 25 2010, 05:17 PM

Reason for edit: Swapped thumbnail in for full size image

[Bjorn Jonsson]

Here is a Mimas/Herschel animation based on a slightly improved version of the DEM mentioned earlier in the thread. Steve's map has been draped over the DEM:

 mimas_herschel_stereo_sfs_dem.avi ( 4.86MB ) Number of downloads: 349


The field of view is 50° and the altitude above Mimas' surface ranges from ~100 km to ~250 km. As mentioned earlier the stereo based DEM is extremely crude since I haven't incorporated the new data into it. Once this data hits the PDS the accuracy will greatly improve. It should also be kept in mind that the shape-from-shading DEM I combined with the stereo DEM is highly preliminary. Despite this I think this gives a good idea of what this thing looks like - at the very least this is by far the most realistic animation of Herschel I have ever seen ;-).

[stevesliva]

Nice! The view from that peak would be tremendous.

[Bjorn Jonsson]

The view to the NNW from the central peak summit might be somewhat similar to this:



The altitude above the central peak summit is less than 100 meters and the field of view is 60 degrees. Needless to say the detailed appearance of the crater floor is only approximate but the crater wall height should be fairly accurate.

[Antdoghalo]

Mimas and Tethys crater:


http://www.flickr.com/photos/lunexit/4367259591/sizes/o/

....so similar and different at the same time!

Those are no moons
Those are the Death stars we thought we blew up
Wheres George Lucas when you need him

[stevesliva]

The altitude above the central peak summit is less than 100 meters and the field of view is 60 degrees. Needless to say the detailed appearance of the crater floor is only approximate but the crater wall height should be fairly accurate.

Cool! Too bad it's the anti-saturn hemisphere...

[scalbers]

Here is a test render where Steve's map has been draped over the DEM without applying any shading:

The viewing geometry is the same as previously. This reveals that some of the DEM's topography may be due to albedo variations in the source map and not due to topographic shading. 'Blinking' these two images is rather interesting.

Bjorn - nice to see the layering in the walls of Herschel on this. Is this a true vertical perspective or is there any vertical exaggeration?

[scalbers]

here is the global color and high-resolution map of Mimas i posted on my blog a few weeks back!
(although at 400 m resolution, this version is shown at 800 m). I will be posting some fun Rhea views later today.

The paper describing all the color maps has now been submitted for publication. In it we describe
the blue equatorial bands on the leading hemispheres of both Mimas and Tethys and show
they are due to electrons bombarding and altering the surface. The Saturn system is complicated!


http://stereomoons.blogspot.com

Interesting Paul to see this blue band on both Mimas and Tethys. I also notice they both show a brownish color on their trailing hemispheres.

[Bjorn Jonsson]

Bjorn - nice to see the layering in the walls of Herschel on this. Is this a true vertical perspective or is there any vertical exaggeration?

There is no vertical exaggeration in any of the images/animations I have posted here. The largest uncertainty is the steepness of the crater walls. This is because the stereo DEM is very crude as previously noted.