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NH Ultima Thule Encounter Observations & Results, post-flyby discussion as the data arrives
alex_k
post Mar 18 2019, 03:58 PM
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QUOTE (fredk @ Mar 18 2019, 08:12 PM) *
To the extent that the spectral responses of the two cameras are different, you could create a crude 2-false-colour image from those frames. You'd need to warp one frame to align them better, though.


A great idea, Fredk!
A rough attempt:
Attached Image

(update 2)
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HSchirmer
post Mar 18 2019, 04:06 PM
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QUOTE (Phil Stooke @ Mar 18 2019, 04:53 PM) *
I was in that session at LPSC - they are working on shape and stereo but more to do for a final shape model. Then the images can be merged effectively.

Jeff Moore said they are not convinced the small pits are impact craters, and suggest some may be drainage depressions leading into sub-surface voids. Not sure I agree, but a size distribution plot would be a useful thing to help with that problem.

Phil


Curious, if there is void filling, would the "Brasil nut effect" being temperature dependent change things?

There has been some suggestion that size sorting is temperature dependent,
    http://large.stanford.edu/courses/2007/ph210/spector2/
    Reverse Brazil Nut Problem

    A paper by Hong et al. in 2001 predicted the "reverse Brazil nut effect", in which under certain conditions, their numerical observation showed the opposite effect - large beads falling to the bottom of a container, and small beads rising to the top of the container. [4,5] A previous finding of theirs showed that a system of hard sphere condenses in the presence of gravity below a critical temperature Tc [6].P.V. Quinn and D.C. Hong, Phys. Rev. E 62, 8295 (2000).


Rather interesting to consider the possibility of thermodynamics past Pluto driving "grain tectonics".
Imagine if the Brazil-nut effect shakes warm KBOs into minimum surface spheres; while the reverse-Brasil-nut-effect shakes cool KBOs into maximum sufrace pancake?
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alan
post Mar 18 2019, 04:18 PM
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Livestream here at 1 ET

https://livestream.com/viewnow/lpsc2019
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alan
post Mar 18 2019, 05:31 PM
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unmannedspaceflight.com was just mentioned at the press conference
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HSchirmer
post Mar 18 2019, 05:42 PM
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QUOTE (alan @ Mar 18 2019, 05:31 PM) *
unmannedspaceflight.com was just mentioned at the press conference

Eh, names are fair when names are given...


Time Counter -12:OO
"This was posted to Unmanned Spaceflightdot com by citizen scientist Roman Tkachenko"


http://www.unmannedspaceflight.com/index.p...st&p=244187
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stevesliva
post Mar 18 2019, 09:25 PM
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Press conference material is up on NH website
http://pluto.jhuapl.edu/News-Center/News-A...p?page=20190318
with slides here:
http://pluto.jhuapl.edu/News-Center/Press-...page=2019-03-18
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atomoid
post Mar 19 2019, 02:32 AM
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more reporting coming out, this from Science News
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alex_k
post Mar 19 2019, 05:40 PM
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QUOTE (fredk @ Mar 18 2019, 08:12 PM) *
To the extent that the spectral responses of the two cameras are different, you could create a crude 2-false-colour image from those frames. You'd need to warp one frame to align them better, though.

Resolution is also increased.

update: improved version
Attached Image
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alan
post May 16 2019, 07:22 PM
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Initial results from the New Horizons exploration of 2014 MU69, a small Kuiper Belt object

https://science.sciencemag.org/content/364/6441/eaaw9771
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nprev
post May 16 2019, 11:53 PM
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Outstanding. smile.gif

In addition to name-checking the forum & highlighting Roman's work, an UMSF moderator is one of the coauthors of this paper. smile.gif


--------------------
A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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