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Rosetta - Early Orbital Operations at Comet 67P C-G, August 6, 2014 - November 13, 2014
machi
post Aug 7 2014, 08:15 PM
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BBC released very interesting footage from (evidently) OSIRIS camera. Images are from 3. August 2014.
Now it's possible to derive stereo images directly from the published images.
This is comparison with my "synthetic" stereo image of 67P (it's the lower pair).
You can see that top left image is exactly the same image as lower right image.

EDIT: This version was deleted and was replaced by this one.


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atomoid
post Aug 7 2014, 09:08 PM
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heres a <sloppy> crosseye of the topography inside that shadowed 'hole' area inside the pole of the smaller clump at right in machi's stereo, this based on the sequence Emily posted earlier
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algorithm
post Aug 7 2014, 09:20 PM
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What is the estimated mass of this object?
What is the mass of the lander?
Depending on the above, the gravitational pull on the lander may be negligable, so it could be.. pick a spot-any spot.
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Phil Stooke
post Aug 7 2014, 09:33 PM
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It's more about local geology and safety. How smooth is the area? Is it coarse-grained or fine-grained, or maybe quite solid? (from thermal inertia). Is there any evidence of volatiles, or is it depleted, baked dry? Is the area active during the run-up to landing, or is it inert?

Phil



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centsworth_II
post Aug 7 2014, 10:16 PM
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My estimate of how football stadiums at two locations would look.
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fredk
post Aug 7 2014, 10:36 PM
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QUOTE (machi @ Aug 7 2014, 08:15 PM) *
BBC released very interesting footage from (evidently) OSIRIS camera.

You should find slightly better image quality from the original BBC story here:
http://www.bbc.co.uk/news/science-environment-28659783
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machi
post Aug 7 2014, 11:18 PM
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Yes, I should.
I saw that article but I have disabled automatic playback for flash so I overlooked this video and Google found the other one.
BTW, here is animated GIF.


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anticitizen2
post Aug 8 2014, 12:02 AM
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I had to grab larger frames from the video and slow it down

http://i.imgur.com/T8oZl7a.gif

Two days of utter amazement so far

Edit: album of the screen captures: http://imgur.com/a/0Lo1E#0
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djellison
post Aug 8 2014, 12:27 AM
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QUOTE (MichaelJWP @ Aug 6 2014, 10:42 PM) *
They look good, Doug. Do you provide textures and are the models u-v'd or are they just for printing?


Nope - just un-textured STL's for printing.

QUOTE (jgoldader @ Aug 7 2014, 05:24 AM) *
Any chance of Gaspra?


I'll look into it - but it would be pretty low res so might not be worth the effort.
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Dyche Mullins
post Aug 8 2014, 12:41 AM
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A few more useful size comparisons.

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machi
post Aug 8 2014, 01:00 AM
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QUOTE (anticitizen2 @ Aug 8 2014, 02:02 AM) *
I had to grab larger frames from the video and slow it down

http://i.imgur.com/T8oZl7a.gif
...


Thanks! It's impossible with my Internet connection to grab this video at full resolution.
Here is very interesting view on the head of the comet 67P from two grabbed images.
Credit for original images: ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA.
Attached thumbnail(s)
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machi
post Aug 8 2014, 01:13 AM
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And here is comparison between stereo images with both real images (lower one) and with one synthetic image (top) in the pair.
Thanks to anticitizen2 both pairs have now same resolution but the lower pair is still somewhat blurred.
I deleted the older version.
Attached thumbnail(s)
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anticitizen2
post Aug 8 2014, 02:18 AM
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And thank you for the 3D images! Those have truly brought me there next to the comet.

I feel like I owe you a dozen gasps of amazement from the people around me as I showed them your image of the comet in 3D
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lunaitesrock
post Aug 8 2014, 03:16 AM
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The processed photos released to date all have good contrast and likely have been brightened and stretched to some extent. Have any been processed to show the comet's actual appearance?

I haven't seen much discussion on albedo except mention that 67P/C-G is very dark, as would be expected if much of the nonvolatile remnants on the surface are similar in composition to carbonaceous chondrite meteorites.

Karl
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nprev
post Aug 8 2014, 05:39 AM
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INCREDIBLE, Daniel--thank you!!!!

In my opinion this is by far the most classically 'alien'-looking little world examined by spacecraft to date--straight out of a 1950s B-movie. Amazing to think of how different the processes by which all these odd, jagged landforms arose must be from those we've observed elsewhere. With any luck, though, we'll be able to see those processes in action a bit.


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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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