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Hayabusa Post-Landing & Science Results
MahFL
post Jul 6 2010, 02:08 PM
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Those grains look too big to have been missed before launch, most of the capsule appears to be squeaky clean, with a few dust grains in there collected as it landed, well lets hope for the best. smile.gif
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ElkGroveDan
post Jul 6 2010, 02:16 PM
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I agree. I am growing optimistic now.


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pandaneko
post Jul 6 2010, 03:47 PM
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QUOTE (MahFL @ Jul 6 2010, 11:08 PM) *
Those grains look too big to have been missed before launch, smile.gif


My association with ISAS profs has been long. What they unanimously told me is this. What one space and astronomy researcher can do during his research life time, at the maximum, is two projects, or even less, given the conception period and subsequent development stages.

I have known a few people (both Japanese and overseas on collaboratibve projects) whose projects were simply busted, either from mulfunctioning boosters, or subsequent failures.

That is why people take utmost care before launch. Therefore, I do not believe for a moment that there were those Earth originated grains before launch on the cannister.

Pandaneko
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pandaneko
post Jul 7 2010, 10:17 AM
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Futher reporting from the Mainichi newspaper here, dated 18:54 local 7 July.

Apparently, a very large number of grains, much smaller than those (0.01 mm) earlier reported about were found inside the inner tube surface.

They apparently scraped the inner surface of the inner tube with a spatuler and found those. No more details are available, just yet.

Pandaneko
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Stu
post Jul 7 2010, 11:15 AM
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Sorry, for a moment there I actually thought you said that the techs and scientists involved in this amazing mission, involving mega hi-tech space hardware and minute quantities of literally priceless proto-planetary material, "scraped the inner surface of the inner tube with a spatula".

laugh.gif laugh.gif

ohmy.gif


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pandaneko
post Jul 7 2010, 12:20 PM
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QUOTE (Stu @ Jul 7 2010, 08:15 PM) *
"scraped the inner surface of the inner tube with a spatula".

laugh.gif laugh.gif

ohmy.gif


I quite agree with you here. But, that is what the newspaer said and even my earlier posting about the recovery process expected also mentioned it, in fact with my own comment at that time "how primitive it is!". I think that was a few weeks back now, after landing, of course.

However, at that time I also mentioned liquid washing at the same time for recovery of remaining grains not recovered by the spatula.

It must be a spatula of special type? I do not know.

Pandaneko
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pandaneko
post Jul 7 2010, 01:26 PM
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Other newspapers are starting to carry similar stories about the large number of grains newly found inside the inner tube.

The Yomiuri newspaper, for instance, says that the size of the newly found grains is from 0.01 mm down to 0.001 mm. There are apparently lots of them. It also said that they used a special spatula for the recovery of these newly found grains.

However, it also said that they think that there were a large number of Earth origin grains already resident in the first place inside the tube.

They failed to purge them before launch?, why? I am utterly at a loss.

Pandaneko
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amezz
post Jul 7 2010, 01:49 PM
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QUOTE (pandaneko @ Jul 7 2010, 05:26 PM) *
Other newspapers...

Dear Pandaneko I'll very appreciate direct urls to quoted newspapers here

thanks, Andrey
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elakdawalla
post Jul 7 2010, 01:56 PM
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One assumes it was a very special spatula. Presumably they bought it here.


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ElkGroveDan
post Jul 7 2010, 02:25 PM
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QUOTE (Stu @ Jul 7 2010, 04:15 AM) *
"scraped the inner surface of the inner tube with a spatula".

This just in: Japanese Scientists have announced that the asteroid Itokawa is made of mint frosting.


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pandaneko
post Jul 7 2010, 02:34 PM
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QUOTE (amezz @ Jul 7 2010, 10:49 PM) *
Dear Pandaneko I'll very appreciate direct urls to quoted newspapers here

thanks, Andrey


Dear Andrey

What I have been quoting from are all in Japanese. Would those URLs helP? For instance, here below is the Yomiuri's URL.

http://www.yomiuri.co.jp/science/news/2010....htm?from=main1

Please let me know what you think. We can work out solutions, perhaps?

Pandaneko
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AndyG
post Jul 7 2010, 03:03 PM
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QUOTE (elakdawalla @ Jul 7 2010, 02:56 PM) *
One assumes it was a very special spatula. Presumably they bought it here.


There's nowhere else I'd go for mine. laugh.gif

Andy

(Now, how to get Conan the Librarian into a thread??)

Don't bother ... Doug
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djellison
post Jul 7 2010, 03:06 PM
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Who wrote 'Don't bother ... Doug'

It sure as he'll wasn't me.
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tasp
post Jul 7 2010, 03:09 PM
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IIRC, during daylight hours on the earth's moon there is a phenomena that levitates dust (is there a thread here somewhere about it?). Are these Itakowa particles in the same size range and perhaps a similar phenomena got them into the collection device even though the pyro thing did not fire ?

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Hungry4info
post Jul 7 2010, 03:21 PM
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Good question. IIRC, the haze on the moon isn't really visible unless you're coming around the terminator from the night side looking toward the day side (or on the night side near the terminator like that one Surveyor). I don't think Hayabusa ever got to this orientation, so we may not have any evidence for such things.

Another thing to consider, would the dust achieve escape velocity? Itokawa may have lost the dust with which it did that long ago. What is left may only be small rocks and pebbles that were heavy enough not to levitate (and/or leave). IIRC, the Musea Sea up closed showed more a collection of pebbles than a pure fine sand.


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