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Rosetta - Early Orbital Operations at Comet 67P C-G, August 6, 2014 - November 13, 2014
JohnVV
post Aug 28 2014, 12:34 AM
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QUOTE (Y Bar Ranch @ Aug 27 2014, 01:18 PM) *
Where would the axis of rotation be in this figure?


a image ( same as above )
with northpole and 180 Deg Long.
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Steve G
post Aug 28 2014, 04:33 AM
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QUOTE (Explorer1 @ Aug 27 2014, 04:28 PM) *
In some combination of good/bad news, the navcam images are now filling the frame; they are compensating with four at a time, but only a 'corner' is out now:

http://blogs.esa.int/rosetta/2014/08/27/cometwatch-update/



This comet really reminds me of that 1950's artwork of the moon and asteroids. It's downright creepy. Look at the pointed peaks and has a lot of variety for such a tiny world.
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Malmer
post Aug 28 2014, 07:34 AM
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QUOTE (Explorer1 @ Aug 28 2014, 01:28 AM) *
In some combination of good/bad news, the navcam images are now filling the frame; they are compensating with four at a time, but only a 'corner' is out now:

http://blogs.esa.int/rosetta/2014/08/27/cometwatch-update/



I have reverse engineered the camera location in relation to the comet for all the nav cam images from the begining of the encounter up until today.



I'm planning on doing it for all the images they release. (working on a shapemodel)

This would help when stitching images taken at slightly different times...


Is this archive showing all publicly available images? http://www.esa.int/spaceinimages/Missions/.../(class)/image)
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Malmer
post Aug 28 2014, 09:04 AM
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Attached Image


One curious thing that I noticed is that ALL the navcam images released so far are clustered within one hemisphere of the comet.
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Hungry4info
post Aug 28 2014, 11:23 AM
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The rotation axis is highly inclined like Uranus. Right now, one of the comet's poles are facing the sun, and the southern hemisphere is mostly in "night."
So, as far as being able to see things is concerned, it's only worth seeing the illuminated, northern hemisphere.


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MahFL
post Aug 28 2014, 12:07 PM
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QUOTE (Explorer1 @ Aug 28 2014, 12:28 AM) *
In some combination of good/bad news, the navcam images are now filling the frame; they are compensating with four at a time, but only a 'corner' is out now:


In your opinion which part of that is bad news ?
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centsworth_II
post Aug 28 2014, 12:51 PM
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QUOTE (MahFL @ Aug 28 2014, 07:07 AM) *
In your opinion which part of that is bad news?
First of all, I'd like to express how ABSOLUTELY, TOTALLY, FREAKING AWESOME this mission is. If the "bad" part thus far is that at this distance four images need to be taken to get a global view with much less than four times gain in resolution (and all the stitching problems), I'll take it. I'm sure Explorer1 just forgot the quotes around "bad news".

Attached Image
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fredk
post Aug 28 2014, 02:39 PM
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QUOTE (Malmer @ Aug 28 2014, 09:04 AM) *

Attached Image

What are the axes, and what are the orange blocks and coloured symbols here?
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Malmer
post Aug 28 2014, 02:59 PM
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QUOTE (Hungry4info @ Aug 28 2014, 01:23 PM) *
The rotation axis is highly inclined like Uranus. Right now, one of the comet's poles are facing the sun, and the southern hemisphere is mostly in "night."
So, as far as being able to see things is concerned, it's only worth seeing the illuminated, northern hemisphere.


It would be nice with a "crescent" one just for aestetic purposes.
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Gerald
post Aug 28 2014, 03:06 PM
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QUOTE (fredk @ Aug 28 2014, 04:39 PM) *
What are the axes, and what are the orange blocks and coloured symbols here?

The orange blocks are symbols of the camera positions when the images have been taken.
The object in the center should reperesent the comet.

The quaternions together with the names/dates of the images would may be useful for people working on the same topic.
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Malmer
post Aug 28 2014, 03:09 PM
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QUOTE (fredk @ Aug 28 2014, 04:39 PM) *
What are the axes, and what are the orange blocks and coloured symbols here?



that little jumble of blue dots in the middle is the comet. The orange blocks represent the camera positions in relation to the comet for each shot.

The axes and scene scale are arbitrarily selected right now.
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Explorer1
post Aug 28 2014, 05:46 PM
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Yes, centsworth, that's what I meant by 'bad' news; we can't see the whole nucleus in the daily image release anymore. We haven't gotten an OSIRIS in a while either...
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MarsInMyLifetime
post Aug 28 2014, 06:29 PM
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QUOTE (Explorer1 @ Aug 28 2014, 11:46 AM) *
...We haven't gotten an OSIRIS in a while either...

Were the landing site subframes based on OSIRIS or Navcam data? I supposed them to be peeks into the most recent OSIRIS planning photos.


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Hungry4info
post Aug 28 2014, 10:33 PM
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QUOTE (Malmer @ Aug 28 2014, 08:59 AM) *
It would be nice with a "crescent" one just for aestetic purposes.

The reason we haven't seen any of those is simply because Rosetta has not been on that side of the comet. We've stayed over the dayside for surveying purposes.
See this video.
https://www.youtube.com/watch?v=hplkIritIn8


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elakdawalla
post Aug 29 2014, 01:12 AM
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QUOTE (MarsInMyLifetime @ Aug 28 2014, 11:29 AM) *
Were the landing site subframes based on OSIRIS or Navcam data? I supposed them to be peeks into the most recent OSIRIS planning photos.

Yes, the landing site "zooms" were eeny weeny crops of OSIRIS data, 540 pixels square out of the 2048-pixel CCD.


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