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Pluto Surface Observations 2: NH Post-Encounter Phase, 10 Oct 2015- 1 Feb 2016
machi
post Oct 17 2015, 01:17 AM
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QUOTE (Gladstoner @ Oct 16 2015, 10:02 PM) *
I assume the blank/noisy LORRI image releases from 11:22:02 to 11:22:36 are part of the high-res strip. Are they a portion taken beyond Pluto's limb, or is something else going on?

Yes, they shows dark space (with some luck few RAWs could show atmosphere).
There are still at least 7 images missing in the sequence (P_MPAN_1) which contains Pluto's surface (11:22:38 - 11:22:50).


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eliBonora
post Oct 17 2015, 03:39 AM
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The latest mosaic with LORRI images (one was so black that it seems there was nothing!)



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Saturns Moon Tit...
post Oct 17 2015, 11:21 AM
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What was the resolution on the latest high res strip?
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HSchirmer
post Oct 17 2015, 11:45 AM
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QUOTE (Gladstoner @ Oct 17 2015, 12:29 AM) *
I can understand regularly spaced pits and rows of pits, but how in the world can there be pits occurring in pairs?

[attachment=38221:pairs.jpg]


I suspect those are actually dunes, with dark material on the sunlit side, and bright frost on the shady side.

Shading does weird things to human vision-

Take a look at the dune fields around Saudi Arabia / Kuait 22.4119038,50.4721622
What do you think you see?

Mesas and buttes in a field of saw-toothed ridges, or areas of open rock in a field of dunes?
Attached thumbnail(s)
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machi
post Oct 17 2015, 12:10 PM
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Pits are much more plausible explanation.
On majority of mountains and craters dark material is almost always on the shady side. It's unlikely that this would be different for plains.
It's also very difficult to explains existence of dunes on the body with such low atmospheric pressure.
We will see pretty soon what's correct as we can expect high resolution stereo data for those regions.

QUOTE (Saturns Moon Titan @ Oct 17 2015, 01:21 PM) *
What was the resolution on the latest high res strip?


~120 meters per pixel.


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Gladstoner
post Oct 17 2015, 02:49 PM
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I suspect the size, form, orientation, and clustering of the pits have to do with the structure, fabric, and/or composition (two or more types of more-or-less immiscible ices?) of the Sputnik material itself.
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Saturns Moon Tit...
post Oct 17 2015, 04:47 PM
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Are these the highest resolution images of Pluto we're going to get then?
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stfletch
post Oct 17 2015, 04:55 PM
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Nope, we should get two strips which are about 70-80m per pixel, one from just before closest approach and one from just after.
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Gladstoner
post Oct 17 2015, 05:10 PM
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Do we know (or can we estimate) the area of coverage of the 70-80/pixel strips?
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volcanopele
post Oct 17 2015, 05:32 PM
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Here was the predict for the pre-C/A strip
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Gladstoner
post Oct 17 2015, 05:48 PM
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QUOTE (volcanopele @ Oct 17 2015, 12:32 PM) *
Here was the predict for the pre-C/A strip
[attachment....]

Thanks. I've seen that before but was unable to relocate it.

I was hoping they captured some of the terrain to the east of the recently released strip. The interaction of smooth and rough terrain here is beyond intriguing.
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Gladstoner
post Oct 17 2015, 06:15 PM
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Rough estimate of track shown rendered above, alongside recently released strip:

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tanjent
post Oct 17 2015, 09:14 PM
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QUOTE (volcanopele @ Oct 18 2015, 01:32 AM) *
Here was the predict for the pre-C/A strip


I am puzzled why they did not stop when they reached the terminator.
Uncertainty in the pointing probably didn't exceed the four frames of empty space captured on either side of the (dwarf) planet.
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djellison
post Oct 17 2015, 09:54 PM
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QUOTE (tanjent @ Oct 17 2015, 02:14 PM) *
Uncertainty in the pointing probably didn't exceed the four frames of empty space captured on either side of the (dwarf) planet.


It did. Not uncertainty in the pointing, exactly - but uncertainty in the location of Pluto along the track of the spacecraft.
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tedstryk
post Oct 18 2015, 12:18 PM
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QUOTE (djellison @ Oct 17 2015, 10:54 PM) *
It did. Not uncertainty in the pointing, exactly - but uncertainty in the location of Pluto along the track of the spacecraft.


Yeah, uncertainty was quite large. Better be safe than sorry.


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