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EPOXI Mission News
PDP8E
post Nov 4 2010, 04:08 PM
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...of the small sample of rocks and comets we have visited , most (alot?) tend to exhibit this shape architecture -- is there a clue here?


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dilo
post Nov 4 2010, 04:18 PM
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Attempt to make two stereo pairs from images #495378/385/389 (caution: very large baselines!)

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nprev
post Nov 4 2010, 04:44 PM
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Phenomenal!!! Late to the party as usual because of pain meds, but remarkable work as always, guys!


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elakdawalla
post Nov 4 2010, 05:05 PM
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There's a directory full of images here:
http://epoxi.umd.edu/3gallery/ENCOUNTER/
It includes the five close-approach pics, plus some more distant views from the 24 hours before close approach. The pictures are all posted with fairly detailed metadata embedded within the pixels of the images themselves, including information on the stretch that was applied to them (the min and max original DN in the 16 bit image) as well as filter and exposure information. Most images were taken through a clear filter but some were taken through narrowband filters in emission lines of OH, CN, and C2, which are in ultraviolet and green wavelengths. Anybody out there planning to take a crack at some color combos? I may not be able to try until I get home after the afternoon briefing...


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peter59
post Nov 4 2010, 05:23 PM
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Where are images taken by the High Resolution Instrument (HRI) ? I know that the instrument is out of focus, but it always HRI.


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Stu
post Nov 4 2010, 05:34 PM
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Dum-dum, dum-dum, dum-dum...

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post Nov 4 2010, 05:41 PM
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Damn; where's the "like" button? rolleyes.gif

Good one, Stu!


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elakdawalla
post Nov 4 2010, 05:46 PM
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QUOTE (peter59 @ Nov 4 2010, 09:23 AM) *
Where are images taken by the High Resolution Instrument (HRI) ? I know that the instrument is out of focus, but it always HRI.

They weren't planning on releasing those today. The deconvolution process is now well-understood but it does require manual tuning, and they don't want to release non-deconvolved versions (not as JPEGs anyway).


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Guest_cassioli_*
post Nov 4 2010, 05:57 PM
Post #144





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"normalized" animation:

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Den
post Nov 4 2010, 06:20 PM
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QUOTE (marsbug @ Nov 4 2010, 04:39 PM) *
These jets look very distinct, I wonder how well that gels withthe idea that cometary jets are the product of surface wide sublimation focused by topography? I recall that being the most favoured mechanism behind cometary jets, though I could be out of date or just plain misremembering.


Come to think about it, that mechanism seems unlikely to be at work for long.

Even if at the beginning evaporation does happen directly on the surface of the young comet, very soon the surface gets covered by mantle of non-sublimating dry dust.

Then further evaporation proceeds slower, underneath this mantling layer.

Resulting gas often doesn't escape uniformly - it finds weaker spots and forms fissures => we see jets!
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Guest_cassioli_*
post Nov 4 2010, 06:38 PM
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Full flyby animation
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Paolo
post Nov 4 2010, 08:34 PM
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been watching the press event on NASA TV. two good questions by Emily!
I have lost the part about the engineering aspects of the flyby. what was the final distance? and does anybody know whether a transcript or podcast or recorded video of the event is available?
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ups
post Nov 4 2010, 08:35 PM
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QUOTE (Stu @ Nov 4 2010, 06:34 PM) *
Dum-dum, dum-dum, dum-dum...


smile.gif


Lol, well done.

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peter59
post Nov 4 2010, 09:00 PM
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Enhanced version of opposite end of comet with tons of jets silhouetting night side
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peter59
post Nov 4 2010, 09:35 PM
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I found more radar data (October 24-27,29-31) and Hartley 2 model.
http://www.naic.edu/science/ao_hartley.html
We can compare the model with reality, a perfect fit.


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