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Instrument commissioning phase, Beginning final approach to the comet
Phil Stooke
post Jun 5 2014, 01:04 PM
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Also, if you save up all that delta-v and just do one big burn you have little or no chance to fix any problems - an unexpected safing event for instance. Doing it in several steps lets you recover from any problems more easily.

The first two burns were by far the biggest. With them done successfully, it should be fairly smooth sailing now. And I would think we would be resolving the nucleus very soon. I am so looking forward to the first disk-resolved images.

Phil



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machi
post Jun 5 2014, 05:04 PM
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OSIRIS will resolve nucleus at the beginning of July. In time of fifth burn (2.7.) Rosetta will be ~52 000 km from the comet and resolution will be ~ 1 km/pix (few image elements across cometary disc).


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MahFL
post Jun 6 2014, 11:49 AM
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From the website

"Note: In fact, this variability in the actual thrust delivered versus what's planned is one of the reasons why the required orbit corrections are being done in a series of smaller burns. Any variation in one burn can be made up in the next, helping the entire process to be more efficient and optimise the use of fuel."

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Explorer1
post Jun 17 2014, 08:07 PM
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Big burn coming tomorrow:
http://blogs.esa.int/rosetta/2014/06/17/th...g-burns-part-3/

According to a reply on one of the comments there will be new images this week.
Less than one LD to go!
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Paolo
post Jun 19 2014, 12:23 PM
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Churyumov-Gerasimenko on 4 June. quieter than before
http://www.esa.int/Our_Activities/Space_Sc..._the_unexpected
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MahFL
post Jun 19 2014, 03:12 PM
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QUOTE (Paolo @ Jun 19 2014, 01:23 PM) *
Churyumov-Gerasimenko on 4 June. quieter than before


Is going quieter normal, and will it impact the mission ?
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djellison
post Jun 19 2014, 03:13 PM
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Normal? Yes.
Impact the mission? No.
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Paolo
post Jun 22 2014, 11:22 AM
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it's time we start taking bets...
will the nucleus look like this or like this?
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Phil Stooke
post Jun 22 2014, 04:02 PM
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OK, I'll go first. The old shape model, the first you linked to, is too symmetrical for my taste... I'm pretty sure that is an artifact of the modeling. So I vote for the second one. A digital Mars Bar to everybody if I'm wrong.

Phil



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JohnVV
post Jun 22 2014, 08:02 PM
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well i did post a celestia SPICE add on for this
in this thread
http://forum.celestialmatters.org/viewtopi...?f=18&t=578

it is a synthetic noise added


The Original shape file
ftp://naif.jpl.nasa.gov/pub/naif/generic_...ov-gerasimenko/
and
ftp://naif.jpl.nasa.gov/pub/naif/generic_...ko/input_files/
imported into blender
http://forum.celestialmatters.org/viewtopi...p?f=4&t=618



and the .obj file ( rotated to match the above plate file )
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djellison
post Jun 22 2014, 08:16 PM
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We'll find out when we get there. Once that happens, perhaps there can be a meritorious discussion on the various means of establishing a shape model from light curves and how well they match the actual nucleus.
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Explorer1
post Jun 25 2014, 03:48 PM
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A navcam movie is out. Mostly just a speck, but getting brighter.
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Phil Stooke
post Jun 25 2014, 06:05 PM
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Right, and see the associated note about data availability.

Phil



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JohnVV
post Jun 25 2014, 06:38 PM
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so in January/February we might have access to the data ,other than published news
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djellison
post Jun 25 2014, 06:45 PM
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I would urge caution in interpreting any data release schedule. The only thing we've learned over the 11 years since launch is that most of the instrument teams are in no hurry at all to release their data.
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