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Stardust-NExT, Revisiting Tempel 1
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post Dec 30 2010, 03:04 AM
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QUOTE (volcanopele @ Dec 29 2010, 09:58 PM) *
Quick question: is the rotation of Temple 1 understood well enough that the mission planners can ensure that the DI impact site will be on the comet's sunlit side when Stardust-NExT flies by?



According to this yes. http://www.sdnext.org/mission/pdfs/SD_NEXT_Fctsht.pdf
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stevesliva
post Dec 30 2010, 03:30 AM
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QUOTE (nprev @ Dec 29 2010, 08:32 PM) *
On the plus side this sounds like a well-understood fault state (esp. because it appears that there is some heritage with this system), and they are taking preventative actions well before the flyby.


Yeah, just a bit flip. Somewhat amusing that it was an error with the error-checking, if I read that right.
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djellison
post Dec 30 2010, 03:46 AM
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Actually - I would urge caution on the crater observation. It's a goal, but it's not a certainty. The mag-curve of the nucleus is double bumped, and using the shape model you can match it very well in both bumps - so basically, we may get the crater, or we may not.

If we get it - awesome. If we don't - we get to map the other side of the Nucleus which is also awesome.
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JohnVV
post Dec 30 2010, 05:35 AM
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QUOTE
somewhat worrying mission status update

?? i would not use "somewhat worrying" it looks like a normal everyday address allocation bug

At least it is not a BSOD

QUOTE
It is caused by a latch-up of a redundant memory address register

sounds like a raid 1 set up
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stevesliva
post Dec 30 2010, 05:50 AM
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QUOTE (JohnVV @ Dec 30 2010, 12:35 AM) *
sounds like a raid 1 set up


Yeah, pretty much. Sounds like they're comparing addresses with completely redundant memory words. Sucks when one of the address registers goes haywire.
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Phil Stooke
post Jan 3 2011, 05:38 AM
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"It's a small team and everybody who's involved in Stardust was also involved in Deep Impact/Hartley 2 -- same science team, same outreach folks."

That's where UMSF comes in...

Phil


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Astro0
post Jan 3 2011, 10:00 AM
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That's where UMSF comes in...
Hey, anything we can do to help smile.gif They know we're watching, ready and willing to lend a hand.

Just thought about the fact that it was 7 years ago today that Stardust encountered comet Wild2 and now here we are, 42 days from the encounter with Tempel1. I remember it as a hectic time at the Canberra DSN, we were prime for the comet encounter and 24 hours later, prime for MER Spirit's landing. smile.gif
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Paolo
post Jan 7 2011, 12:49 PM
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a new status update. stardustnext.jpl.nasa.gov/mission/mission_status11_q1.html
it turns out the comet is still too faint to be visible in OpNav images


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CJSF
post Jan 7 2011, 04:45 PM
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QUOTE (Paolo @ Jan 7 2011, 07:49 AM) *
a new status update. stardustnext.jpl.nasa.gov/mission/mission_status11_q1.html
it turns out the comet is still too faint to be visible in OpNav images


And it says they have lower fuel reserves than expected. I'm really excited about this encounter. It also mentioned the cold boot due to the "MEEB" restored the memory to its factory default. Does this mean they lost any patches or updates to the memory or memory management that were uploaded to the craft since launch?

CJSF


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stevesliva
post Jan 19 2011, 10:53 PM
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No updates for awhile, but this RSS feed may point to updates in that status page:
http://feedity.com/rss.aspx/nasa-gov/UVRWW1ZV
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Paolo
post Jan 22 2011, 08:42 AM
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a new status update http://stardustnext.jpl.nasa.gov/mission/m...tatus11_q1.html
comet still not in sight

QUOTE
January 19, 2011
The spacecraft continues to operate as expected and all subsystems are healthy on approach to comet Tempel 1. This week the spacecraft started to tip back and forth to the imaging attitude in order to fix the Navcam mirror in a position that results in less scattered light reaching the CCD. This strategy has resulted in much lower background noise. The comet has not yet been detected in the images, and may not be detected for another week yet. The team continues to prepare for the Tempel 1 flyby by completing the tests of the encounter sequences.


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elakdawalla
post Jan 22 2011, 10:14 PM
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Thanks for keeping an eye on that site, Paolo!


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Hungry4info
post Jan 27 2011, 02:39 PM
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Stardust has located Tempel 1.
http://www.jpl.nasa.gov/news/news.cfm?rele...elease_2011-029


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ZLD
post Jan 27 2011, 08:49 PM
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Heres a slightly cleaned up version:
Attached Image


You can just barely make out a slight crescent and the shape of Tempel 1.
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djellison
post Jan 27 2011, 09:19 PM
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That's just the coma - not the nucleus itself. Stardust's Navcam is 3.5 deg FOV, so we wont resolve the nucleus until very near close approach.
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