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Rosetta - Early Orbital Operations at Comet 67P C-G, August 6, 2014 - November 13, 2014
centsworth_II
post Aug 6 2014, 12:56 PM
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In the press briefing it was noted that the blue represents constant shadow, the red constant light and the yellow shows areas with dark and light periods. Also from the briefing, they want the landing area 'to have a clear day/night cycle for scientific reasons.'

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Screen shots from the video linked by Emily in post 10.
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Gerald
post Aug 6 2014, 12:57 PM
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Overview image of the imges posted by Astro0,
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and two images showing the zone of major dust/volatile release:
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mcgyver
post Aug 6 2014, 01:03 PM
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How to figure out scale in these wonderful images?
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Jaro_in_Montreal
post Aug 6 2014, 01:07 PM
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QUOTE (0101Morpheus @ Aug 6 2014, 01:48 PM) *
blink.gif Indeed

There is an incredible amount variable terrain for such a small object. Could sublimation be the cause or is it something else? wacko.gif

Just a guess..... but it looks to me like the smaller component's shape, resembling half of an apple core, is the result of large amounts of material spalling off during the initial collision that formed this bizarre comet nucleus, leaving just a conical central part at the contact point - which subsequently filled in a bit with dust & debris.....

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anticitizen2
post Aug 6 2014, 01:09 PM
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QUOTE (walfy @ Jul 31 2014, 06:16 PM) *
A quick size comparison with the Burj Khalifa, current tallest human-made structure.

Re-posting this very useful image by walfy of the comet on July 29th
The Burj Khalifa is about 830m tall if that works as a celestial kilometer-stick
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john_s
post Aug 6 2014, 01:11 PM
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Wow. And spooky! This was designed by Tim Burton (or maybe Terry Gilliam)

John
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centsworth_II
post Aug 6 2014, 01:16 PM
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QUOTE (mcgyver @ Aug 6 2014, 09:03 AM) *
How to figure out scale in these wonderful images?
End to end longways is 4 km (2.5 miles). Boulders seen in the closeups were described as 'house sized'.
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tolis
post Aug 6 2014, 01:32 PM
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QUOTE (Gerald @ Aug 6 2014, 12:57 PM) *
Overview image of the imges posted by Astro0,
and two images showing the zone of major dust/volatile release:
ADMIN EDIT: Please do not requote images when posting.

Volatiles seem to be emitted primarily from the "neck". Is this similar to what was observed at Hartley 2 I wonder?
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Phil Stooke
post Aug 6 2014, 01:51 PM
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No, it's the opposite of Hartley 2.

Phil


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... because the Solar System ain't gonna map itself.
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centsworth_II
post Aug 6 2014, 02:07 PM
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Maybe the neck jets represent the sublimation of superficial ice that collected in cold sinks at the end of the comet's last pass rather than indicating a deep structure of ice in the neck.
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Gerald
post Aug 6 2014, 02:33 PM
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Here is a magnified "low"-resolution version of one of today's OSIRIS images (via screenshot), with a high-resolution patch of the "neck":
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DFinfrock
post Aug 6 2014, 03:38 PM
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QUOTE (centsworth_II @ Aug 6 2014, 01:56 PM) *
In the press briefing it was noted that the blue represents constant shadow, the red constant light and the yellow shows areas with dark and light periods. Also from the briefing, they want the landing area 'to have a clear day/night cycle for scientific reasons.'
Screen shots from the video linked by Emily in post 10.
ADMIN EDIT: Please do not requote images when posting.

If there are no significant engineering or safety constraints, I hope that the landing site selection committee avoids the areas at the end of either lobe of the comet. There you would have a great view of the local surface and dark space above. But if they can safely land in one of those green spots closer to the neck of the comet, just imagine the spectacular view - not only of the local surface, but of the other half of the comet looming overhead.
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machi
post Aug 6 2014, 04:07 PM
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Stereo image of the 67P/Churyumov-Gerasimenko. One image is original from OSIRIS camera (date 3.8.2014).
Second one is synthetic image obtained from OSIRIS and NavCam images. Resolution is 5.3 m/pix.
Credit for original images: ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/.DASP/IDA/NavCam.
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machi
post Aug 6 2014, 04:08 PM
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And here is cross-eye version of the same stereo image:


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akuo
post Aug 6 2014, 04:37 PM
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Wonderful achievement to be here after so many years! Congrats to ESA.

To me the surface looks like snow banks shaped after a fierce storm.


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Antti Kuosmanen
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