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-   -   More about Comet 9P/Tempel 1, Deep Impact and ... those wacky Japanese & ESA astronomers! SUBTITLED "What's an order of magnitiude difference amongst friends & scientists, anyway ? " (http://www.spacebanter.com/showthread.php?t=65735)

Ra♥ïⁿg L♂♀♫iε October 14th 05 10:30 AM

More about Comet 9P/Tempel 1, Deep Impact and ... those wacky Japanese & ESA astronomers! SUBTITLED "What's an order of magnitiude difference amongst friends & scientists, anyway ? "
 
Remember this ...

'When NASA=E2=80=99s Deep Impact mission ploughed into comet 9P/Tempel 1 on
July 4th of this year, the giant telescopes on Mauna Kea had a unique
view of the massive cloud of dust, gas and ice expelled during the
collision. See previous Gemini release on observations here.cache ...'

And the "here" http://tinyurl.com/crt44

' Deep Impact Captured by Gemini Print

Saturday, 02 July 2005 ~~~~~ STILL dated 2 days BEFORE impact!

The Gemini North telescope on Mauna Kea successfully captured the
dramatic fireworks display ... '

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3 D=3D=3D=3D=3D=3D=3D=3D

HERE IS A NEW ANOMALY! 'Subtitled' as ...
What is an order of magnitiude amongst friends & scientists, anyway ?

ESA claims the impact liberated '4500 tonnes of water + even MORE dust
' Let's say 10,000 tons for argument sake ( 12 October 2005 )

Subaru Telescope claims 'the mass of material blasted out by the
collision, which is estimated to be as much as 25 fully-loaded tractor
trailer-trucks.'

More specifically, ...' a firm estimate of the mass ejection, which was
about 1000 tons. "To release this amount of material, the comet must
have a fairly soft consistency," Sugita said. ...' ( September 15, 2005
)

1 or 10 kiloton mass of ejecta ... Which is it ?
Am I missing something here ?


See refs. below ...

http://www.universetoday.com/am/publ....html?13102005
for provided the intial information.
-----------------------------------------------------------


' Rosetta, with its set of very sensitive instruments for cometary
investigations, used its capabilities to observe Tempel 1 before,
during and after the impact.

At a distance of about 80 million kilometres from the comet, Rosetta
was in the most privileged position to observe the event. ...

..=2E. The 370 kg copper impactor hit Comet Tempel 1 with a relative
velocity of 10.2 kilometres per second. The collision was expected to
generate a crater with a predicted diameter of about 100-125 metres and
eject cometary material. It vaporised 4500 tonnes of water, but
surprisingly released even more dust. ...'

See http://www.esa.int/esaCP/SEMUSK5Y3EE_index_0.html


' ...Because the spacecraft was unable to study the size of the crater
created after it was formed, the high-resolution Mauna Kea observations
provided the necessary data to get a firm estimate of the mass
ejection, which was about 1000 tons. "To release this amount of
material, the comet must have a fairly soft consistency," Sugita said.
..=2E.

..=2E."The splash from NASA's impact probe freed these materials and we
were in the right place to capture them with the biggest telescopes on
Earth," said W.M. Keck Director Fred Chaffee. "The close collaboration
among Keck, Gemini and Subaru assured that the very best science was
done by the best telescopes in the world, demonstrating that the whole
is often greater than the sum of its parts." ... '

See http://subarutelescope.org/Pressrele...15b/index.html


Prai Jei October 15th 05 10:09 PM

More about Comet 9P/Tempel 1, Deep Impact and ... those wacky Japanese & ESA astronomers! SUBTITLED "What's an order of magnitiude difference amongst friends & scientists, anyway ? "
 
Ra♥ïⁿg L♂♀♫iε (or somebody else of the same name) wrote thusly in message
.com:

Remember this ...

'When NASA’s Deep Impact mission ploughed into comet 9P/Tempel 1 on
July 4th of this year, the giant telescopes on Mauna Kea had a unique
view of the massive cloud of dust, gas and ice expelled during the
collision. See previous Gemini release on observations here.cache ...'


They haven't answered the crucial question. Has the comet been knocked
sufficiently off course? Will it now miss the Earth?
--
There are very few spiders found on bananas that bite.

Interchange the alphabetic letter groups to reply

Ra♥ïⁿg L♂♀♫iε October 16th 05 12:55 AM

More about Comet 9P/Tempel 1, Deep Impact and ... those wacky Japanese & ESA astronomers! SUBTITLED "What's an order of magnitiude difference amongst friends & scientists, anyway ? "
 
Prai Jei wrote:
Ra♥ïⁿg L♂♀♫iε (or somebody else of the same name) wrote thusly in message
.com:

Remember this ...

'When NASA’s Deep Impact mission ploughed into comet 9P/Tempel 1 on
July 4th of this year, the giant telescopes on Mauna Kea had a unique
view of the massive cloud of dust, gas and ice expelled during the
collision. See previous Gemini release on observations here.cache ...'


They haven't answered the crucial question. Has the comet been knocked
sufficiently off course? Will it now miss the Earth?


It was never seriously considered to hit the Earth.

... Moreover, I have yet to see any mention of the deflection to comet
9P/Tempel's orbit. Am I to assume that such an estimate of ejecta,
ejected by this means is unmeasurable ? ... or is such a measure,
inexhorably bound up in the mass of the comet body, overall ?

[sci.astro ... restored]

RL


George Dishman October 16th 05 09:31 AM

More about Comet 9P/Tempel 1, Deep Impact and ... those wacky Japanese & ESA astronomers! SUBTITLED "What's an order of magnitiude difference amongst friends & scientists, anyway ? "
 

"Prai Jei" wrote in message
...
Ra??g L???i? (or somebody else of the same name) wrote thusly in message
.com:

Remember this ...

'When NASA's Deep Impact mission ploughed into comet 9P/Tempel 1 on
July 4th of this year, the giant telescopes on Mauna Kea had a unique
view of the massive cloud of dust, gas and ice expelled during the
collision. See previous Gemini release on observations here.cache ...'


They haven't answered the crucial question. Has the comet been knocked
sufficiently off course? Will it now miss the Earth?


It wasn't going to hit Earth.

http://deepimpact.jpl.nasa.gov/faq3.html#q5

Natural encounters with Jupiter and other perturbations have a
far greater effect than Deep Impact. In fact normal outgassing
from the comet will probably have a larger effect.

http://deepimpact.jpl.nasa.gov/scien...bitalhist.html

Can you blow a leaf off a tree if you sneeze in a hurricane?

George




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