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Ceres Low-Altitude Mapping Orbit (LAMO)
charborob
post Mar 4 2016, 08:49 PM
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LAMO 39-40 mosaic:

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ZLD
post Mar 4 2016, 10:04 PM
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LAMO 40

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Gladstoner
post Mar 5 2016, 06:02 PM
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QUOTE (charborob @ Mar 4 2016, 02:49 PM) *
LAMO 39-40 mosaic:

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That ejecta seems to be more fluid than usual (as far as we've seen so far). In places, it resembles outflow channels on Mars.

Some context of Ikapati Crater....

HAMO image 64:
http://photojournal.jpl.nasa.gov/catalog/PIA20127

Survey Orbit image 30:
http://photojournal.jpl.nasa.gov/catalog/PIA19599

This ejecta seems to be mostly confined within the low point of a larger, older crater (outlined in yellow):

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ZLD
post Mar 5 2016, 07:38 PM
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Was certainly thinking that as well Gladstoner. There is several very peculiar spots that look like very quick or non-viscous material moved quickly to fill the lower crater and surrounding area.


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Gladstoner
post Mar 6 2016, 07:55 AM
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A checklist of interesting features in Ikapati Crater (labeled in image):

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1. White spots. Their extent is minor compared to other craters.
2. Extensional fractures. These are on the floor, rim and ejecta.
3. 'Shotgun blast' pits. These seem to be more than mere clustered impacts.
4. Degraded central peak. The flat top (or pit?) contrasting with the fluted sides is quite interesting.
5. Fluvial-like flow structures.
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Bill Harris
post Mar 7 2016, 06:09 PM
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Ahuna. The closer we look, the more mysterious it becomes. I'm still thinking "my gawd, it's full of stars... "

--Bill


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Explorer1
post Mar 7 2016, 07:01 PM
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How large is the gap between the rim of the crater and Ahuna's slopes? The caption says 35 m/ pixel (here), so less than a kilometer separation, by my count. Is it just a coincidence that the mountain is so close?
What an odd view one would have standing on the surface there, too...
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Gladstoner
post Mar 7 2016, 09:04 PM
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That terrain on top of Ahuna.... It just seems to have no rhyme or reason. If anything, it appears like a souffle that has risen and collapsed back down a bit (with some subsequent mass wasting around the edges).

Oh, and that hanging valley on the west side of the summit is spectacular.
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ZLD
post Mar 7 2016, 10:56 PM
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LAMO 41

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Ahuna Mons in LAMO

Cropped and enhanced:



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Bill Harris
post Mar 8 2016, 12:17 AM
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QUOTE (Gladstoner)
That terrain on top of Ahuna.... It just seems to have no rhyme or reason.


I can't quite place with anything known. And the walls, NW to SE, still look rather vitreous and translucent. And the talus (or lack of) at the toe of the slope. I predict views with different lighting angles and a series of oblique views.

Here is a montage of Ahuna from SO6 through HO1:

https://univ.smugmug.com/Dawn-Mission/Ceres...mtn_montage.png

--Bill


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JohnVV
post Mar 8 2016, 06:50 AM
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for lamo "PIA20348"
this is what i get in Blender




and a 8bit copy of the heightmap
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Bill Harris
post Mar 9 2016, 03:06 AM
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Added the new LAMO image of Acuna Mons to the SO-HO-LO series of image:

https://univ.smugmug.com/Dawn-Mission/Ceres...-LO_montage.png

--Bill


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ZLD
post Mar 10 2016, 03:53 PM
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LAMO 42

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ZLD
post Mar 10 2016, 04:26 PM
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LAMO 43

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Ken2
post Mar 10 2016, 08:30 PM
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QUOTE (JohnVV @ Mar 7 2016, 10:50 PM) *
for lamo "PIA20348"
this is what i get in Blender

...
and a 8bit copy of the heightmap


Nice renders, I think the height map is most telling - I sketched a few craters outllnes in dotted outlines. I think the upwelling of the mountain is part of the larger upwelling area (in solid outline), and because of the relatively fluffy old crater infill to the top left, it broke through at that spot.

I still think the only thing that can get that kind of energy to build a plateau is an impact on the other side (Dantu) and this is the antipode. The age of the two events also seems roughly similar (newish events)

P.S. Dawn just won the 2015 Collier Trophy - congrats to the team - thats a big deal! naa.aero/awards/awards-and-trophies/collier-trophy

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