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Ceres Low-Altitude Mapping Orbit (LAMO)
Habukaz
post Jan 27 2016, 01:21 PM
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QUOTE
Re: spots: I'm taking pics of small parts of Ceres, covering it over time. Don't have good Occator pics yet; eventually I will. Stay tuned!


https://twitter.com/NASA_Dawn/status/692099462332682241

Haven't seen or heard any word on the mountain, yet.


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Bill Harris
post Jan 27 2016, 03:26 PM
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My idea is that the really good LAMO images are spectacular and good material for papers, so they've not released them in the dozen-or-so daily images. After the papers get out and the data hits the PDS we'll have some jaw-droppers. Time will tell.

--Bill


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ZLD
post Jan 27 2016, 05:12 PM
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My blog post
LAMO 14





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Gladstoner
post Jan 27 2016, 08:48 PM
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QUOTE (ZLD @ Jan 27 2016, 03:29 AM) *
I definitely think there is some resemblance here. However, I have to wonder that if they have been through similar processes, in regards to Dantu, why has a small patch of bright material near the cracks remained while everything else has disappeared, especially a bright central patch of it in the center of the central ridge. One possibility is that it has been recently active, long after most of the bight material was covered up or insolation caused the material to become less reflective. But if it was recently active, then how?

Yes, we may be seeing two different stages of the life cycle of some 'volcanic' process. The sparse white spots in Dantu could be the (relatively recent) dying gasps of activity. For an earthly analogy, I'm thinking along the lines of the cinder cones atop the dormant Mauna Kea (Hawaii) vs. the more robust lava flows from the younger Mauna Loa.
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Daniele_bianchin...
post Jan 28 2016, 01:15 AM
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I think it is a central peak, some as seen on the Moon or Mercury. I study enough geology, and volcanoes. I honestly don't see a signs of volcanic activity. However, I don 't know what form would a volcano over a small body without gravity 'as Ceres.
These is the only structures that seem cones, but perhaps just a coincidence ..



This is a volcanic chain of example, not very clear volcano, but an expert recognizes obvious signs of volcano, although it is a not classical volcano

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JohnVV
post Jan 28 2016, 01:35 AM
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low angle renderings of that "volcano?"


bare mesh, mesh and a gray shader, mesh and the image texture
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Gladstoner
post Jan 28 2016, 02:15 AM
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QUOTE (Daniele_bianchino_Italy @ Jan 27 2016, 07:15 PM) *
I think it is a central peak, some as seen on the Moon or Mercury. I study enough geology, and volcanoes. I honestly don't see a signs of volcanic activity. However, I don 't know what form would a volcano over a small body without gravity 'as Ceres.
These is the only structures that seem cones, but perhaps just a coincidence ..

Plus, impact craters are more likely to be preserved on the summit of a mountain than on its slopes.
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ZLD
post Jan 28 2016, 09:24 PM
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LAMO 15

My blog post





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Michael Capobian...
post Jan 28 2016, 11:25 PM
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Finally, a look into Kerwan, the sand dollar.
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Gladstoner
post Jan 29 2016, 07:56 AM
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Looks like a mini Haulani:

Attached Image
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ZLD
post Jan 29 2016, 06:07 PM
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I didn't get to watch all of the SBAG Dawn presentation this morning. Hopefully I will get an update today from the NASA public affairs office about the recording and I will post it if available. From what I did see, it was a pretty good update to the status of the mission with lots of good slides and information. The slides should be posted by the end of the day which will include a pretty good shot of Haulani in LAMO. Below is a screen grab.

Attached Image


Also posted today was a nice animation from DLR, of a simulated flyover of Ceres, similar to the previous animation but with much higher resolution. Link


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ZLD
post Jan 29 2016, 07:23 PM
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LAMO 16
My blog post





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Ken2
post Jan 29 2016, 07:34 PM
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QUOTE (Gladstoner @ Jan 26 2016, 12:46 PM) *
Fascinating features.

So what's with those radiating 'bird feet'? If I saw those hills on Earth, I'd think they were an erosional remnant of a larger mountain. But on Ceres, there is no apparent process to remove the material in such a manner.


QUOTE (Ken2 @ Jan 26 2016, 03:21 PM) *
I favor the least interesting explanation as evident in Kupalo Crater from LAMO PIA20192, I think it's due to settling and sliding of the puffy ejecta in-fill of the craters.

Most craters* start out as an empty cones, and in-fill by their ejecta and landslides, and the ejecta of countless other craters. The craters are filled of unstable relatively puffy fine-grained ejecta. Subsequent impacts cause huge Ceres-quakes which will cause landslides (clearly evident all over the place) and settling, which I believe is the majority of the cracks on crater floors.


*Most craters (other then young ones big enough to have lava in-fill at the time of creation, and very large ones (I don't know what that size is on Ceres, and it's probably a function of age))
e.g. old (earliest) craters have a harder surface which may rebound more. Also assuming it was mostly a molten interior at the time of formation, then the lava in-fill (and after a given crater could no longer expose lava) then elastic rebound would be decreasing as a function of age. The later craters would be formed in a puffy impact gardened surface which looks to be km thick. An impact in a loosely bound matrix would evacuate a clean cone and then have severe landslides back into the pit. It's even possible that most of the central peaks are in fact landslide conjunctions (i.e. if there are landslides all around the craters they would meet in the middle and after a few met the forming ridge/peak would accumulate subsequence landslide terminating debris as the crater in-filled. I think these type of processes may explain the majority of Cere's crater's features. I wonder what magnitude Cere's quake is generated for a given impact diameter and distance from the impact?


Just a visual update on my hypothesis:

Attached Image
Kupalo Crater from LAMO PIA20192

The younger Kupalo Crater clearly shows landslide formed cracks and this view [below] from today's movie shows how the Dantu settling/landslide fault line cracks are most likely the same mechanism. ZLD's screen grab today (previous post) of Haulani in LAMO shows similar landslide cracks. Also the Kupalo and Dantu landslides both appear to end at the central "peak" area with a linear terminus pile-up. Note that landslides in .028g should travel much further then in 1g on earth.

Attached Image
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ZLD
post Feb 1 2016, 11:16 PM
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LAMO 17
My blog post





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JohnVV
post Feb 2 2016, 02:55 AM
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A few low angle renders from LAMO 16
http://photojournal.jpl.nasa.gov/catalog/PIA20306

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