Instrument commissioning phase, Beginning final approach to the comet |
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Instrument commissioning phase, Beginning final approach to the comet |
 Jun 5 2014, 01:04 PM
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#16
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Solar System Cartographer  Group: Members Posts: 10149 Joined: 5-April 05 From: Canada Member No.: 227  |
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 -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Jun 5 2014, 05:04 PM
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#17
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 Member Group: Members Posts: 796 Joined: 27-February 08 From: Heart of Europe Member No.: 4057 |
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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Jun 6 2014, 11:49 AM
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#18
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Forum Contributor Group: Members Posts: 1372 Joined: 8-February 04 From: North East Florida, USA. Member No.: 11 |
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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Jun 17 2014, 08:07 PM
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#19
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 Senior Member Group: Members Posts: 2080 Joined: 13-February 10 From: Ontario Member No.: 5221 |
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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Jun 19 2014, 12:23 PM
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#20
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 Senior Member Group: Members Posts: 1729 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
Churyumov-Gerasimenko on 4 June. quieter than before
http://www.esa.int/Our_Activities/Space_Sc..._the_unexpected |
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Jun 19 2014, 03:12 PM
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#21
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Forum Contributor Group: Members Posts: 1372 Joined: 8-February 04 From: North East Florida, USA. Member No.: 11 |
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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Jun 19 2014, 03:13 PM
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#22
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Founder Group: Chairman Posts: 14431 Joined: 8-February 04 Member No.: 1 |
Normal? Yes.
Impact the mission? No. |
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Jun 22 2014, 11:22 AM
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#23
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Senior Member Group: Members Posts: 1729 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
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Jun 22 2014, 04:02 PM
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#24
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Solar System Cartographer Group: Members Posts: 10149 Joined: 5-April 05 From: Canada Member No.: 227 |
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 -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Jun 22 2014, 08:02 PM
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#25
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Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
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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Jun 22 2014, 08:16 PM
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#26
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Founder Group: Chairman Posts: 14431 Joined: 8-February 04 Member No.: 1 |
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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Jun 25 2014, 03:48 PM
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#27
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Senior Member Group: Members Posts: 2080 Joined: 13-February 10 From: Ontario Member No.: 5221 |
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Jun 25 2014, 06:05 PM
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#28
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Solar System Cartographer Group: Members Posts: 10149 Joined: 5-April 05 From: Canada Member No.: 227 |
Right, and see the associated note about data availability.
Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Jun 25 2014, 06:38 PM
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#29
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Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
so in January/February we might have access to the data ,other than published news
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Jun 25 2014, 06:45 PM
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#30
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Founder Group: Chairman Posts: 14431 Joined: 8-February 04 Member No.: 1 |
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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