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Thread: Is the "Piazzi" feature on Ceres Occator crater?

  1. #1
    Join Date
    Nov 2004
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    Is the "Piazzi" feature on Ceres Occator crater?

    This is driving me nuts. I am certain that "Piazzi" feature on Ceres identified by Hubble in 2002 is Occator crater, but I can't find a citation that verifies this. Does anyone know where I can find one?
    "Occam" is the name of the alien race that will enslave us all eventually. And they've got razors for hands. I don't know if that's true but it seems like the simplest answer."

    Stephen Colbert.

  2. #2
    Join Date
    Apr 2006
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    According to Wikipedia Occator is in Region A not Piazzi. They are citing the below but I don't have access to it.

    Localized sources of water vapour on the dwarf planet (1)Ceres
    Küppers, Michael; O'Rourke, Laurence; Bockelée-Morvan, Dominique; Zakharov, Vladimir; Lee, Seungwon; von Allmen, Paul; Carry, Benoît; Teyssier, David; Marston, Anthony; Müller, Thomas; Crovisier, Jacques; Barucci, M. Antonietta; Moreno, Raphael
    Abstract
    The `snowline' conventionally divides Solar System objects into dry bodies, ranging out to the main asteroid belt, and icy bodies beyond the belt. Models suggest that some of the icy bodies may have migrated into the asteroid belt. Recent observations indicate the presence of water ice on the surface of some asteroids, with sublimation a potential reason for the dust activity observed on others. Hydrated minerals have been found on the surface of the largest object in the asteroid belt, the dwarf planet (1)Ceres, which is thought to be differentiated into a silicate core with an icy mantle. The presence of water vapour around Ceres was suggested by a marginal detection of the photodissociation product of water, hydroxyl (ref. 12), but could not be confirmed by later, more sensitive observations. Here we report the detection of water vapour around Ceres, with at least 1026 molecules being produced per second, originating from localized sources that seem to be linked to mid-latitude regions on the surface. The water evaporation could be due to comet-like sublimation or to cryo-volcanism, in which volcanoes erupt volatiles such as water instead of molten rocks.


    Publication:
    Nature, Volume 505, Issue 7484, pp. 525-527 (2014).
    Pub Date: January 2014 DOI: 10.1038/nature12918
    Bibcode: 2014Natur.505..525K


    A slide from the paper showing the two regions is at https://www.nasa.gov/jpl/herschel/ceres-graph-pia17831/ . They both look crater-ish but Region A moreso. The Piazzi region seems to have had a name change. I don't see it in later feature maps.

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