Re: [meteorite-list] U.S. To Shoot Down Defunct Spy Satellite

2008-02-15 Thread Mark Ford
Hmmm.

Looks like we are in for an even better firework display now then!

Surley fragmenting something this big, will mean it is actually more
likely for [something] to survive? -  since you will create random
pieces of debris with very differing velocities and therefore some might
have more chance of having suitable rentry parameters which will allow
them to survive...

Either way - Really, this is not very good news for the low earth space
environment! 

About time we had some proper global treaties in place to stop countries
randomly polluting space, all for the sake of some commercial secrets
(which are already probably common knowledge anyway).

Best,
Mark Ford


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[meteorite-list] Paleo Finds?

2008-02-15 Thread Mr EMan
Greetings Listoids,

Anyone have a count for the number of confirmed fossil/ paleo
meteorites thus far identified?


Elton
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[meteorite-list] Field expedition - off topic

2008-02-15 Thread info
We will be out in the field and I will have no access to my emails until March 
4th. Thank you for your patience.

Svend

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Re: [meteorite-list] U.S. To Shoot Down Defunct Spy Satellite

2008-02-15 Thread Chris Peterson

Surley fragmenting something this big, will mean it is actually more
likely for [something] to survive?


I don't think so. Space debris reaches the ground when it is protected 
by large structures around it. Break it up into small pieces, and it's 
doubtful anything will survive. (While the official claim is that this 
is being done to protect people from falling, toxic debris, I think we 
all know better. It's being done so sensitive material doesn't end up 
dropping someplace we have no control over.)



...since you will create random
pieces of debris with very differing velocities and therefore some 
might

have more chance of having suitable rentry parameters which will allow
them to survive...


Probably not all that much variation in velocities.

Either way - Really, this is not very good news for the low earth 
space

environment!


This is the _really_ low earth environment- only marginally space at 
all. While I suppose it's possible that a very few pieces could end up 
in higher orbits, on the whole there's nowhere near enough energy being 
delivered to have much effect on the average orbit. Breaking this 
satellite up into small pieces is just going to increase individual 
decay rates. Within a matter of days, the vast majority (if not all) of 
the junk is going to be gone. What the Chinese did last year was 
irresponsible, but destroying this satellite isn't going to produce any 
debris that we have to worry about.


Chris

*
Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com


- Original Message - 
From: Mark Ford [EMAIL PROTECTED]

To: Meteorite-list@meteoritecentral.com
Sent: Friday, February 15, 2008 2:00 AM
Subject: Re: [meteorite-list] U.S. To Shoot Down Defunct Spy Satellite



Hmmm.

Looks like we are in for an even better firework display now then!

Surley fragmenting something this big, will mean it is actually more
likely for [something] to survive? -  since you will create random
pieces of debris with very differing velocities and therefore some 
might

have more chance of having suitable rentry parameters which will allow
them to survive...

Either way - Really, this is not very good news for the low earth 
space

environment!

About time we had some proper global treaties in place to stop 
countries

randomly polluting space, all for the sake of some commercial secrets
(which are already probably common knowledge anyway).

Best,
Mark Ford


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[meteorite-list] Angrites - Meteorites from Mercury...

2008-02-15 Thread Greg Hupe

Hi Darren and fans of Mercury and/or its likely meteorites,

Three strong candidates come to mind ;-)

NWA 2999
NWA 4590 Tamassint
NWA 4801

Best regards,
Greg


Greg Hupe
The Hupe Collection
NaturesVault (eBay)
[EMAIL PROTECTED]
www.LunarRock.com
IMCA 3163

Click here for my current eBay auctions: 
http://search.ebay.com/_W0QQsassZnaturesvault




- Original Message - 
From: Darren Garrison [EMAIL PROTECTED]

To: Meteorite-list@meteoritecentral.com
Sent: Friday, February 15, 2008 12:01 PM
Subject: [meteorite-list] Meteorites from Mercury?


Meteorites from Mercury?
February 15, 2008
by Ken Croswell

Meteorites from the Moon and Mars give earthbound scientists free rock 
samples

from other worlds. Now Brett Gladman and Jaime Coffey (University of British
Columbia, Vancouver) say we should expect a few meteorites from Mercury too.

Gladman and Coffey conducted computer simulations of what happens after
asteroids and comets slam into the innermost planet and kick debris into 
space.
Past studies assumed that rocks knocked off Mercury weren't getting away 
with
much more than its escape velocity of 2.6 miles (4.2 km) per second. That's 
too

slow to climb away from the Sun and make it out to Earth.

But some previous assumptions were wrong, says Gladman, because the 
collisional

circumstances at Mercury are very different than anywhere else. The Sun's
innermost planet speeds through space with a mean velocity of 30 miles (48 
km)

per second. Furthermore, asteroids and comets crossing Mercury's orbit also
travel fast. So impactors strike the planet at speeds 5 to 15 times its 
escape
velocity, and ejecta can rocket off the surface traveling much faster than 
had

been assumed.

The new study, which has been submitted to Meteoritics and Planetary 
Science,
concludes that up to 5% of this high-speed debris from Mercury reaches 
Earth - a
third to a half of the delivery rate of meteorites from Mars. Gladman notes 
that
roughly a half dozen samples of Mercury should already be sitting in 
meteorite

collections worldwide.

But how would an interplanetary prospector recognize that a stone really is 
from
the innermost planet? Some planetary geologists think a rare class of 
meteorites

called angrites might be good candidates, though others disagree. Gladman
cautions, Until you have some kind of ground truth, it's very difficult to 
make
those claims. He says scientists need more information about the 
composition of

Mercury's surface to find matches with suspicious meteorites.

Fortunately, the Messenger spacecraft has begun exploring the planet. 
Messenger
flew past Mercury in January and will go into orbit in 2011. It should 
provide

the data that will confirm or refute candidate meteorites from Mercury.

Ken Croswell is the author of Ten Worlds: Everything That Orbits the Sun 
(Boyds

Mills Press, 2006).

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Re: [meteorite-list] U.S. To Shoot Down Defunct Spy Satellite

2008-02-15 Thread Darren Garrison
On Fri, 15 Feb 2008 09:00:34 -, you wrote:

About time we had some proper global treaties in place to stop countries
randomly polluting space, all for the sake of some commercial secrets
(which are already probably common knowledge anyway).

The enemy probably already have the secret technology that the military is
trying to protect anyway.

http://www.cnsnews.com/news/viewstory.asp?Page=/ForeignBureaus/archive/200802/INT20080212b.html

Surely this kind of thing is a lot more common than reaches public notice.
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[meteorite-list] Rocks from Space Picture of the Day - February 15, 2008

2008-02-15 Thread SPACEROCKSINC
http://www.rocksfromspace.org/February_15_2008.html







___  




**The year's hottest artists on the red carpet at the Grammy 
Awards. Go to AOL Music.  
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[meteorite-list] AD: 140 EBAY NWA's STARTED AT 99 CENTS

2008-02-15 Thread dean bessey
Starting in about an hours time I have 140 meteorites
ending on ebay that I started last week at only 99
cents.
With so many some will probably go for that. Get your
NWA bargains now.
Dont forget to check out my hundreds of buy it now
store items also.
Cheers
DEAN
AMUNRE on ebay
http://stores.ebay.com/DEANS-COLLECTIBLES-AND-GEMSTONES


  

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[meteorite-list] Angrites - Meteorites from Mercury...

2008-02-15 Thread bernd . pauli
Greg writes:

Hi Darren and fans of Mercury and/or its likely meteorites.
Three strong candidates come to mind ;-) 

= NWA 2999 - NWA 4590 Tamassint - NWA 4801 =


Hello List,

If you are interested in seeing how colorful a thin section of
a potential meteorite from Mercury looks in cross-polarized light,
here is the link. It was Rocks From Space Picture of the Day
on January 27, 2006:

http://spacerocksinc.com/Jan27.html

Bernd

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[meteorite-list] paleo meteorite

2008-02-15 Thread steve arnold
Hi list.Which of the paleo meteorite has the pebbles
in them?To me that one is the coolest.

Steve R.Arnold,chicago,Ill,Usa!!
   The Asteroid Belt!
  http://chicagometeorites.net/
  Collecting Meteorites since 06/19/1999
  Ebay I.D. Illinoismeteorites



  

Looking for last minute shopping deals?  
Find them fast with Yahoo! Search.  
http://tools.search.yahoo.com/newsearch/category.php?category=shopping
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Re: [meteorite-list] Meteorites from Mercury?

2008-02-15 Thread Darren Garrison
Forgot the URL

http://www.skyandtelescope.com/news/15665687.html
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[meteorite-list] non-paying bidder beyabu 3.7 g claxton for sale

2008-02-15 Thread mckinney trammell
beyabu (who won my 3.7 gram crusted claxton) is a
non-paying bidder. this crusted, fine specimen is
available for sale for REASONABLE OFFERS over $1,000
usd. this is one of THE finer  larger pieces of this
rare fall will KILLER fusion crust. please email OFF
list for more info. thank you harlan t. big pine key.


  

Be a better friend, newshound, and 
know-it-all with Yahoo! Mobile.  Try it now.  
http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ 

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[meteorite-list] February 2008 Calendar updated

2008-02-15 Thread SPACEROCKSINC
http://www.rocksfromspace.org/February_2008.html

___

Michael  Johnson
http://www.spacerocksinc.com  




**The year's hottest artists on the red carpet at the Grammy 
Awards. Go to AOL Music.  
(http://music.aol.com/grammys?NCID=aolcmp0030002565)
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[meteorite-list] Meteorites from Mercury?

2008-02-15 Thread Darren Garrison
Meteorites from Mercury?
February 15, 2008
by Ken Croswell

Meteorites from the Moon and Mars give earthbound scientists free rock samples
from other worlds. Now Brett Gladman and Jaime Coffey (University of British
Columbia, Vancouver) say we should expect a few meteorites from Mercury too. 

Gladman and Coffey conducted computer simulations of what happens after
asteroids and comets slam into the innermost planet and kick debris into space.
Past studies assumed that rocks knocked off Mercury weren't getting away with
much more than its escape velocity of 2.6 miles (4.2 km) per second. That's too
slow to climb away from the Sun and make it out to Earth. 

But some previous assumptions were wrong, says Gladman, because the collisional
circumstances at Mercury are very different than anywhere else. The Sun's
innermost planet speeds through space with a mean velocity of 30 miles (48 km)
per second. Furthermore, asteroids and comets crossing Mercury's orbit also
travel fast. So impactors strike the planet at speeds 5 to 15 times its escape
velocity, and ejecta can rocket off the surface traveling much faster than had
been assumed. 

The new study, which has been submitted to Meteoritics and Planetary Science,
concludes that up to 5% of this high-speed debris from Mercury reaches Earth — a
third to a half of the delivery rate of meteorites from Mars. Gladman notes that
roughly a half dozen samples of Mercury should already be sitting in meteorite
collections worldwide. 

But how would an interplanetary prospector recognize that a stone really is from
the innermost planet? Some planetary geologists think a rare class of meteorites
called angrites might be good candidates, though others disagree. Gladman
cautions, Until you have some kind of ground truth, it's very difficult to make
those claims. He says scientists need more information about the composition of
Mercury's surface to find matches with suspicious meteorites. 

Fortunately, the Messenger spacecraft has begun exploring the planet. Messenger
flew past Mercury in January and will go into orbit in 2011. It should provide
the data that will confirm or refute candidate meteorites from Mercury. 

Ken Croswell is the author of Ten Worlds: Everything That Orbits the Sun (Boyds
Mills Press, 2006). 

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[meteorite-list] AD - METEORITE Feb. 2000 issue

2008-02-15 Thread JPBrockets
Dear List Members:

For those possibly  interested in a back issue of METEORITE - Feb. 2000  
issue.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=200199280179ssPageNam
e=STRK:MESE:ITih=010

Thank  you.

Juris
[EMAIL PROTECTED]  




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[meteorite-list] Poor people

2008-02-15 Thread Bob Evans

Look at the poor souls who bid on this crap
http://cgi.ebay.com/PLESSITIC-OCTAHEDRITE-IRON-NICKEL-METEORITE-415-GRAMS_W0QQitemZ350022896119QQihZ022QQcategoryZ3239QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
- Original Message - 
From: Darren Garrison [EMAIL PROTECTED]

To: meteorite-list@meteoritecentral.com
Sent: Friday, February 15, 2008 4:27 PM
Subject: [meteorite-list] Here's another winner



http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemitem=250216177459
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Re: [meteorite-list] Poor people

2008-02-15 Thread Adam Hupe
I noticed there is a disproportionate number of these
fakes coming from Illinois.  Is there a huge Chinese
population there?

Best Regards,

Adam



--- Bob Evans [EMAIL PROTECTED] wrote:

 Look at the poor souls who bid on this crap

http://cgi.ebay.com/PLESSITIC-OCTAHEDRITE-IRON-NICKEL-METEORITE-415-GRAMS_W0QQitemZ350022896119QQihZ022QQcategoryZ3239QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
 - Original Message - 
 From: Darren Garrison [EMAIL PROTECTED]
 To: meteorite-list@meteoritecentral.com
 Sent: Friday, February 15, 2008 4:27 PM
 Subject: [meteorite-list] Here's another winner
 
 
 

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemitem=250216177459
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  Meteorite-list@meteoritecentral.com
 

http://six.pairlist.net/mailman/listinfo/meteorite-list
 
 
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[meteorite-list] Here's another winner

2008-02-15 Thread Darren Garrison
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemitem=250216177459
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Re: [meteorite-list] U.S. To Shoot Down Defunct Spy Satellite

2008-02-15 Thread Sterling K. Webb
Hi,

While I agree the likelihood of meaningful debris is very
small, this NYTimes piece:
http://www.nytimes.com/2008/02/15/us/15satellite.html?emex=1203224400en=2350567d2300e89bei=5087%0A
contains a prediction that a successful hit on USA-193 will
produce 100,000 pieces of new debris. I think that is a
complicated engineering question that was almost certainly
NOT evaluated by the person quoted, but I suppose it is
a possibility.

Rob pointed out that only a very small percentage of the
debris will  be directed into potentially dangerous orbits, but
a small percentage of 100,000 is still a respectable number.

The NYTimes piece contains further details of interest. The
three-ship flotilla tasked with the takedown will operate in the
North Pacific where, depending on the orbital inclination, a
stripe running down orbit could stretch around the planet
for a full orbit, down the Pacific, then across Antarctica, up
the Atlantic, over the Arctic, or as close to this ideal as can be
managed.

I hope there's some attempt to derive as much data as
possible from this little adventure. The SM-3's return a lot of
data. There should be tracking ships down the line, I would
think, to determine the progress of the breakup and to check
for big chunks. Since the Times article implies that there will
be only the one cruiser, it is unlikely that there will be more
than the one attempt.


Sterling K. Webb

- Original Message - 
From: Chris Peterson [EMAIL PROTECTED]
To: Meteorite-list@meteoritecentral.com
Sent: Friday, February 15, 2008 11:39 AM
Subject: Re: [meteorite-list] U.S. To Shoot Down Defunct Spy Satellite


 Surley fragmenting something this big, will mean it is actually more
 likely for [something] to survive?

I don't think so. Space debris reaches the ground when it is protected
by large structures around it. Break it up into small pieces, and it's
doubtful anything will survive. (While the official claim is that this
is being done to protect people from falling, toxic debris, I think we
all know better. It's being done so sensitive material doesn't end up
dropping someplace we have no control over.)

 ...since you will create random
 pieces of debris with very differing velocities and therefore some
 might
 have more chance of having suitable rentry parameters which will allow
 them to survive...

Probably not all that much variation in velocities.

 Either way - Really, this is not very good news for the low earth
 space
 environment!

This is the _really_ low earth environment- only marginally space at
all. While I suppose it's possible that a very few pieces could end up
in higher orbits, on the whole there's nowhere near enough energy being
delivered to have much effect on the average orbit. Breaking this
satellite up into small pieces is just going to increase individual
decay rates. Within a matter of days, the vast majority (if not all) of
the junk is going to be gone. What the Chinese did last year was
irresponsible, but destroying this satellite isn't going to produce any
debris that we have to worry about.

Chris

*
Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com


- Original Message - 
From: Mark Ford [EMAIL PROTECTED]
To: Meteorite-list@meteoritecentral.com
Sent: Friday, February 15, 2008 2:00 AM
Subject: Re: [meteorite-list] U.S. To Shoot Down Defunct Spy Satellite


 Hmmm.

 Looks like we are in for an even better firework display now then!

 Surley fragmenting something this big, will mean it is actually more
 likely for [something] to survive? -  since you will create random
 pieces of debris with very differing velocities and therefore some
 might
 have more chance of having suitable rentry parameters which will allow
 them to survive...

 Either way - Really, this is not very good news for the low earth
 space
 environment!

 About time we had some proper global treaties in place to stop
 countries
 randomly polluting space, all for the sake of some commercial secrets
 (which are already probably common knowledge anyway).

 Best,
 Mark Ford

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[meteorite-list] Fw: International Spacestation Flyover

2008-02-15 Thread Jerry

I'm in Plymouth, MA. Anyone near my Lat and Long can see this.
Clear Skies
Jerry Flaherty
- Original Message - 
From: [EMAIL PROTECTED]

To: [EMAIL PROTECTED]
Sent: Friday, February 15, 2008 4:20 PM
Subject: International Spacestation Flyover




Feb 15, 2008: Space Station Flyby Alert

The International Space Station is about to fly over your location.

It will reach a maximum elevation of 65.7 degrees at around
06:19 PM.

To be on the safe side, go outside 5 minutes early and watch the sky for 
10 minutes.

If the sky is clear, you'll see the ISS rise in the WNW and move across
the sky to the SSE.

Note:
To be sure you can see flyovers, Space Weather Phone only sends
alerts for visible flyovers that are above 45 degrees elevation. 


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[meteorite-list] Fw: U.S. To Shoot Down Defunct Spy Satellite

2008-02-15 Thread Sterling K. Webb
Forwarding this to The List for:
- Original Message - 
From: Kelly Beatty [EMAIL PROTECTED]
To: Sterling K. Webb [EMAIL PROTECTED]
Sent: Friday, February 15, 2008 2:57 PM
Subject: RE: [meteorite-list] U.S. To Shoot Down Defunct Spy Satellite


Sterling...

I'm sending you this directly because for some reason my posts to the 
meteorite list aren't going through.

 Rob pointed out that only a very small percentage of the
 debris will  be directed into potentially dangerous orbits, but
 a small percentage of 100,000 is still a respectable number.

*none* of the debris will survive more than a few weeks. that's because 
while, conceivably, the fragments' apogees will change a bit, the perigees 
will not. and the perigees are already so low that fairly rapid decay is 
assured. all else being equal, breaking up the satellite will actually 
hasten reentry because virtually all the resulting pieces will have higher 
area/mass ratios that the intact satellite did.


clear skies,

Kelly Beatty
Executive Editor
SKY  TELESCOPE
617-864-7360 x2148
SkyandTelescope.com 

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[meteorite-list] Fw: U.S. To Shoot Down Defunct Spy Satellite

2008-02-15 Thread Sterling K. Webb
Forwarding this to The List for:
- Original Message - 
From: Matson, Robert D. [EMAIL PROTECTED]
To: Sterling K. Webb [EMAIL PROTECTED]; 
Meteorite-list@meteoritecentral.com
Sent: Friday, February 15, 2008 4:54 PM
Subject: RE: [meteorite-list] U.S. To Shoot Down Defunct Spy Satellite


Hi Sterling (and List, if Sterling forwards for me),

 Rob pointed out that only a very small percentage of the debris
 will be directed into potentially dangerous orbits, but a small
 percentage of 100,000 is still a respectable number.

Agreed; however, due to conservation of momentum the most wayward
pieces will be the smallest pieces, and these will have the highest
drag coefficients.  So it will not take long before drag at perigee
reduces the new boosted apogees right back down again.

The longer they wait to intercept USA 193, the fewer fragments that
will survive one orbit.  For example, at 200-km altitude there is
about a 5-degree half-angle fan of post-impact velocity vectors
which produce fragments that survive beyond one orbit.

The magic bullet fragments are the ones that depart the point
of impact in nearly the same direction that the original satellite
was moving -- but with higher velocity.  Perigee stays the same,
but apogee (and orbital lifetime) gets boosted.  It doesn't take
a lot of extra velocity.  At 200-km perigee, a boost of 30 m/s
will put apogee at 300 km; 59 m/s puts apogee at 400 km; 221 m/s
would send apogee all the way up to 1000 km.  But the key is
that the velocity has to be in that narrow window of directions
that maintains perigee above 100 km.

For similar reasons, at least half the fragments are going to
decay within half an orbit since they will have velocities lower
than the satellite had prior to impact, resulting in new perihelions
below 100 km.  So they will certainly choose an impact time such
that the ground track of the satellite does not pass over populated
areas for at least 1/2 an orbit.  That pretty much means a
descending node pass over the north Pacific -- the further north,
the better such that the only land mass crossed is the extreme
southern tip of South America, and Africa is completely avoided.

By the way, don't miss the opportunity to see passes of USA 193
in the evenings right now!  For example, there are excellent
passes of USA 193 for the next 4 nights over the southern
California area, and there are passes for New York City starting
Saturday night, every night for a week!  --Rob 

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Re: [meteorite-list] Fw: U.S. To Shoot Down Defunct Spy Satellite

2008-02-15 Thread Jerry
Has there been a determination as to when [Universal Tie] and over where 
this feat will be accomplished.

Be neat to witness it!
Jerry Flaherty
- Original Message - 
From: Sterling K. Webb [EMAIL PROTECTED]

To: Meteorite List meteorite-list@meteoritecentral.com
Sent: Friday, February 15, 2008 6:18 PM
Subject: [meteorite-list] Fw: U.S. To Shoot Down Defunct Spy Satellite



Forwarding this to The List for:
- Original Message - 
From: Kelly Beatty [EMAIL PROTECTED]

To: Sterling K. Webb [EMAIL PROTECTED]
Sent: Friday, February 15, 2008 2:57 PM
Subject: RE: [meteorite-list] U.S. To Shoot Down Defunct Spy Satellite


Sterling...

I'm sending you this directly because for some reason my posts to the
meteorite list aren't going through.


Rob pointed out that only a very small percentage of the
debris will  be directed into potentially dangerous orbits, but
a small percentage of 100,000 is still a respectable number.


*none* of the debris will survive more than a few weeks. that's because
while, conceivably, the fragments' apogees will change a bit, the perigees
will not. and the perigees are already so low that fairly rapid decay is
assured. all else being equal, breaking up the satellite will actually
hasten reentry because virtually all the resulting pieces will have higher
area/mass ratios that the intact satellite did.


clear skies,

Kelly Beatty
Executive Editor
SKY  TELESCOPE
617-864-7360 x2148
SkyandTelescope.com

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[meteorite-list] MRO HiRISE Images - February 14, 2008

2008-02-15 Thread Ron Baalke


MARS RECONNAISSANCE ORBITER HIRISE IMAGES
February 14, 2008

o Layers on Floor of Trough in Noctis Labyrinthis
  http://hirise.lpl.arizona.edu/PSP_006679_1680

o Dunes with Unusual Gully
  http://hirise.lpl.arizona.edu/PSP_006648_1300

o Light-toned Layers in Eos Chaos
  http://hirise.lpl.arizona.edu/PSP_005385_1640

o Inverted Channels North of Juventae Chasma
  http://hirise.lpl.arizona.edu/PSP_006770_1760
 
All of the HiRISE images are archived here:

http://hirise.lpl.arizona.edu/

Information about the Mars Reconnaissance Orbiter is 
online at http://www.nasa.gov/mro. The mission is 
managed by NASA's Jet Propulsion Laboratory, a division 
of the California Institute of Technology, for the NASA 
Science Mission Directorate, Washington, D.C. Lockheed 
Martin Space Systems, of Denver, is the prime contractor 
and built the spacecraft. HiRISE is operated by the 
University of Arizona. Ball Aerospace and Technologies 
Corp., of Boulder, Colo., built the HiRISE instrument.
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[meteorite-list] Mars Odyssey THEMIS Images: February 11-15, 2008

2008-02-15 Thread Ron Baalke

MARS ODYSSEY THEMIS IMAGES
February 11-15, 2008

o Wind Action (Released 11 February 2008)
  http://themis.asu.edu/zoom-20080211a

o Sand and Rock (Released 12 February 2008)
  http://themis.asu.edu/zoom-20080212a

o Argyre Dunes (Released 13 February 2008)
  http://themis.asu.edu/zoom-20080213a

o Dark Slope Streaks (Released 14 February 2008)
  http://themis.asu.edu/zoom-20080214a

o Wind Action (Released 15 February 2008)
  http://themis.asu.edu/zoom-20080215a


All of the THEMIS images are archived here:

http://themis.asu.edu/latest.html

NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission 
for NASA's Office of Space Science, Washington, D.C. The Thermal Emission 
Imaging System (THEMIS) was developed by Arizona State University,
Tempe, in co.oration with Raytheon Santa Barbara Remote Sensing. 
The THEMIS investigation is led by Dr. Philip Christensen at Arizona State 
University. Lockheed Martin Astronautics, Denver, is the prime contractor 
for the Odyssey project, and developed and built the orbiter. Mission 
operations are conducted jointly from Lockheed Martin and from JPL, a 
division of the California Institute of Technology in Pasadena. 


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[meteorite-list] Paleo Meteorite

2008-02-15 Thread Greg Hupe

Hi Steve and List,

NWA 2828 has the pebbles that helped to classify this Paleometeorite. Here 
is a link to one of the slices I had that illustrates this occurrence 
including a few other photos of NWA 2828:


NWA 2828 EL3:
Photograph of a 24.9g NWA 2828 slice with rhyolite pebble (image 1):

http://www.lunarrock.com/nwa2828/nwa2828pebble.jpg



Photograph of magnified radial pyroxene chondrule (image 2):

http://www.lunarrock.com/nwa2828/nwa2828chondrule.jpg



Photograph of magnified whitish enstatite-rich clast (image 3):

http://www.lunarrock.com/nwa2828/nwa2828clast.jpg



Photograph of a 14.3g complete slice of NWA 2828 (image 4):

http://www.lunarrock.com/nwa2828/nwa2828slice.jpg



I have plenty of the Blue material, a List member in the recent past 
posted that this may be aubrite material but chondrules were found there 
too, sorry. So far, NWA 4799 is the first and only true aubrite from 
Northwest Africa! Here are some links to this Truly amazing Aubrite. Do 
not forget that when I announced NWA 4799 that I also offered a 100% Money 
Back Guarantee that it will remain classified as an Aubrite. I believe 
this is important because of the NWA 2828 reclassification to EL3 and the 
beliefs of some who think the pairings to NWA 2828 are aubrites:




NWA 4799 True Aubrite:

Image of 26.7 gram polished half of largest stone:

http://www.lunarrock.com/nwa4799/nwa4799a.jpg



Image of large whitish enstatite grains at 26x magnification:

http://www.lunarrock.com/nwa4799/nwa4799c.jpg



Image of large enstatite grain and veins of goethite from alteration of 
metal at 20x magnification (lower left shows small metal grain):


http://www.lunarrock.com/nwa4799/nwa4799d.jpg



Image of large enstatite grains at 32x magnification:

http://www.lunarrock.com/nwa4799/nwa4799e.jpg





Enjoy!
Greg


Greg Hupe
The Hupe Collection
NaturesVault (eBay)
[EMAIL PROTECTED]
www.LunarRock.com
IMCA 3163

Click here for my current eBay auctions: 
http://search.ebay.com/_W0QQsassZnaturesvault




- Original Message - 
From: steve arnold [EMAIL PROTECTED]

To: meteorite-list@meteoritecentral.com
Sent: Friday, February 15, 2008 3:32 PM
Subject: [meteorite-list] paleo meteorite



Hi list.Which of the paleo meteorite has the pebbles
in them?To me that one is the coolest.

Steve R.Arnold,chicago,Ill,Usa!!
  The Asteroid Belt!
 http://chicagometeorites.net/
 Collecting Meteorites since 06/19/1999
 Ebay I.D. Illinoismeteorites





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Find them fast with Yahoo! Search. 
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[meteorite-list] Mars Rovers Sharpen Questions About Livable Conditions

2008-02-15 Thread Ron Baalke

http://www.jpl.nasa.gov/news/news.cfm?release=2008-026

Mars Rovers Sharpen Questions About Livable Conditions
Jet Propulsion Laboratory
February 15, 2008

BOSTON -- Like salt used as a preservative, high concentrations of
dissolved minerals in the wet, early-Mars environment known from
discoveries by NASA's Opportunity rover may have thwarted any microbes
from developing or surviving.

Not all water is fit to drink, said Andrew Knoll, a member of the
rover science team who is a biologist at Harvard University, Cambridge,
Mass.

Opportunity and its twin, Spirit, began their fifth year on Mars last
month, far surpassing their prime missions of three months. Today, at a
meeting of the American Association for the Advancement of Science in
Boston, scientists and engineers discussed new observations by the
rovers, recent analysis of some earlier discoveries, and perspectives on
which lessons from these rovers' successes apply to upcoming missions to
Mars.

The engineering efforts that have enabled the rovers' longevity have
tremendously magnified the science return, said Steve Squyres of
Cornell University, Ithaca, N.Y., principal investigator for the rovers'
science payload. All of Spirit's most important findings, such as
evidence for hot springs or steam vents, came after the prime mission.

Opportunity spent recent months examining a bright band of rocks around
the inner wall of a crater. Scientists previously hypothesized this
material might preserve a record of the ground surface from just before
the impact that excavated the crater. Inspection suggests that, instead,
it was at the top of an underground water table, Squyres reported.

Experiments with simulated Martian conditions and computer modeling are
helping researchers refine earlier assessments of whether the long-ago
conditions in the Meridiani area studied by Opportunity would have been
hospitable to microbes. Chances look slimmer. At first, we focused on
acidity, because the environment would have been very acidic, Knoll
said. Now, we also appreciate the high salinity of the water when it
left behind the minerals Opportunity found. This tightens the noose on
the possibility of life.

Conditions may have been more hospitable earlier, with water less briny,
but later conditions at Meridiani and elsewhere on the surface of Mars
appear to have been less hospitable, Knoll said. Life at the Martian
surface would have been very challenging for the last 4 billion years.
The best hopes for a story of life on Mars are at environments we
haven't studied yet -- older ones, subsurface ones, he said.

NASA's current rovers and orbiters at Mars pursue the agency's follow
the water theme for Mars exploration. They decipher the roles and fate
of water on a planet whose most striking difference from Earth is a
scarcity of water. Our next missions, Phoenix and Mars Science
Laboratory, mark a transition from water to habitability -- assessing
whether sites where there's been water have had conditions suited to
life, said Charles Elachi, director of NASA's Jet Propulsion
Laboratory, Pasadena, Calif. Where conditions were habitable, later
missions may look for evidence of life.

Elachi cited the achievements of Spirit and Opportunity. They have
worked 16 times longer than planned, driven 20 times farther than
planned, and, most important, found diverse geological records of the
effects of water in ancient Martian environments, he said. We must not
let these successes lull us into thinking this type of exploration is
easy. Fifty years into the Space Age, we are still in the golden age of
robotic exploration of our solar system, when each mission is
unprecedented in some way as we push the limits of what is possible.
Each mission presents new challenges.

The Phoenix lander, on course to reach Mars on May 25, will assess
habitability of a shallow subsurface environment of icy soil farther
north than any earlier mission has landed. It revives technology from
missions launched before Spirit and Opportunity. The following mission,
the Mars Science Laboratory rover, will incorporate many lessons from
the current rovers, said that project's manager, Richard Cook of JPL.
The next rover will be much bigger to carry the instruments necessary
for meeting its goals, but it would be laughable to consider doing Mars
Science Laboratory without the experience gained from doing the Mars
Exploration Rovers, he said.

The Mars Science Laboratory rover will weigh about four times as much as
Spirit or Opportunity. There's no way we could use an airbag landing,
said JPL's Rob Manning, chief engineer for the future rover. Instead, a
rocket-powered hovering stage will lower it to the surface on a tether.
Lessons from Spirit and Opportunity will come into play when it starts
driving, though. With the current rovers, we've learned we can trust
the autonomous navigation technology to a level we never expected, so
now we can include that as a capability in our mission design for Mars
Science 

[meteorite-list] Traces of the Martian Past in the Terby Crater (Mars Express)

2008-02-15 Thread Ron Baalke

http://www.esa.int/SPECIALS/Mars_Express/SEMSEWEMKBF_0.html

Traces of the martian past in the Terby crater
European Space Agency
Mars Epxress 
25 January 2008

The High Resolution Stereo Camera (HRSC) on board ESA's Mars Express has
returned striking scenes of the Terby crater on Mars. The region is of
great scientific interest as it holds information on the role of water
in the history of the planet.
 
The image data was obtained on 13 April 2007 during orbit 4199, with a
ground resolution of approximately 13 m/pixel. The Sun illuminates the
scene from the west (from above in the image).  
 
[Terby crater context map]

Terby crater lies at approximately 27 degrees south and 74 degrees east, at the
northern edge of the Hellas Planitia impact basin in the southern
hemisphere of Mars.
 
 
[Terby crater]

The crater, named after the Belgian astronomer Francois J. Terby (1846 –
1911), has a diameter of approximately 170 km. The scene shows a section
of a second impact crater in the north.
 
 
[Terby crater: annotated nadir view, see full caption for details]

Eye-catching finger-shaped plateaux extend in the north-south direction.
They rise up to 2000 m above the surrounding terrain. The relatively old
crater was filled with sediments in the past, which formed plateaux on
erosion.
 
 
[Terby crater, perspective view]

The flanks of the plateaux clearly exhibit layering of
different-coloured material. Differences in colour usually indicate
changes in the composition of the material and such layering is called
bedding. Bedding structures are typical of sedimentary rock, which has
been deposited either by wind or water. Different rock layers erode
differently, forming terraces.
 
 
[A perspective view of Terby crater]

The valleys exhibit gullies, or channels cut in the ground by running
liquid, mainly in the northern part of the image. These gullies and the
rock-bedding structure indicate that the region has been affected by water.
 
 
[Terby crater, nadir view]

The sediments in this region are interesting to study because they
contain information on the role of water in the history of the planet.
This is one of the reasons why Terby crater was originally short listed
as one of 33 possible landing sites for NASA’s Mars Science Laboratory
mission, planned for launch in 2009.
 
 
[Terby crater, 3D view]

The colour scenes have been derived from the three HRSC colour channels
and the nadir channel. The perspective views have been calculated from
the digital terrain model derived from the HRSC stereo channels. The 3D
anaglyph image was calculated from the nadir channel and one stereo
channel, stereoscopic glasses are required for viewing.


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[meteorite-list] First Near-Earth Triple Asteroid Discovered by Arecibo Observatory Astronomers

2008-02-15 Thread Ron Baalke


Press Relations Office
Cornell University
Ithaca, New York

Media Contact: Blaine Friedlander
Phone: (607) 254-8093

FOR RELEASE: Feb. 13, 2008

First near-Earth triple asteroid discovered by Arecibo Observatory
astronomers -- a mere 7 million miles from Earth

ITHACA, N.Y. -- Once considered just your average single asteroid, 2001
SN263 has now been revealed as the first near-Earth triple asteroid ever
found. The asteroid -- with three bodies orbiting each other -- was
discovered this week by astronomers at the sensitive radar telescope at
Cornell University's Arecibo Observatory in Puerto Rico.

Cornell University and Arecibo astronomer Michael C. Nolan said he and his
colleagues made the discovery when they obtained radar images Feb. 11. The
group subsequently took more images to learn that the three objects -- about
7 million miles from Earth -- are rotating around each other.

The main, central body is spherical with a diameter of roughly 1.5 miles (2
kilometers), while the larger of the two moons is about half that size. The
smallest object is about 1,000 feet across, or about the size of the Arecibo
telescope.

Other triple asteroids exist in the asteroid belt (between Mars and Jupiter)
and beyond, but this is the first near-Earth system where the actual shapes
of objects can be clearly seen.

The Arecibo telescope is operated for the NSF by Cornell's National
Astronomy and Ionosphere Center.

This discovery has extremely important implications for ideas about the
origins of near-Earth asteroids and the processes responsible for their
physical properties, said Nolan. Double, or binary, asteroid systems are
known to be fairly common -- about one in six near-Earth asteroids is a
binary -- but this is the first near-Earth triple system to be discovered.

The object was first discovered visually Sept. 19, 2001, by the Lincoln Near
Earth Asteroid Research (LINEAR) project, part of the Massachusetts
Institute of Technology's Lincoln Laboratory. The orbits of binary -- and
now triple -- asteroid systems unveil the mass and allow astronomers to
assess whether they are stable over millennia or have formed very recently.
Previous radar investigations of binary near-Earth asteroids have disclosed
extraordinary physical and dynamical characteristics.

Nolan said this discovery prompts several important questions: Are the
objects orbiting in the same plane? How rapidly are the orbits changing with
time? Did the moons form when this asteroid formed in the main asteroid
belt, or after it arrived in near-Earth space?

Because of the small sizes and irregularly shaped components, 2001 SN263
should offer unique insights relative to the much larger triple systems in
the main asteroid belt, said Nolan. Examining the orbits of the moons as we
continue to observe 2001 SN263 over the next few weeks may allow us to
determine the density of the asteroid and type of material from which it is
made, he said. We will also be studying its shape, surface features and
regolith [blanketing material] properties.

Radar observations by the Arecibo Observatory can image a much larger
fraction of the population of near-Earth asteroids than spacecraft. For
example, Arecibo has discovered more than half of the near-Earth binary
asteroid systems discovered since 1999. Continued observations will
undoubtedly lead to the discovery of new classes of objects, such as this
triple system. While the Arecibo telescope is capable of these
investigations, the future of the radar program and the entire telescope are
in considerable doubt due to NSF budget cuts.

Nolan's collaborators on the project are Ellen S. Howell, Arecibo
Observatory/Cornell University; Lance A.M. Benner, Steven J. Ostro and Jon
D. Giorgini, Jet Propulsion Laboratory/California Institute of Technology;
Michael W. Busch, Caltech; Lynn M. Carter and Ross F. Anderson, Smithsonian
Institution; Chris Magri, University of Maine at Farmington; Donald B.
Campbell and Jean-Luc Margot, Cornell; Ronald J. Vervack Jr., Johns Hopkins
University Applied Physics Laboratory; and Michael K. Shepard, Bloomsburg
University.

IMAGE CAPTION:
[http://www.news.cornell.edu/stories/Feb08/asteroid.png (8KB)]
2001 SN263 has now been revealed as the first near-Earth triple asteroid
ever found. (Arecibo Observatory)

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[meteorite-list] DoD To Engage Decaying Satellite

2008-02-15 Thread Ron Baalke


Public Affairs
U.S. Department of Defense
Office of the Assistant Secretary of Defense
Washington, D.C.

Media contact:
+1 (703) 697-5131/697-5132

IMMEDIATE RELEASE: February 14, 2008

No. 0125-08

DoD To Engage Decaying Satellite

An uncontrollable U.S. experimental satellite which was launched in December
2006 is expected to reenter Earth's atmosphere between the end of February
and early March. Because the satellite was never operational, analysis
indicate that approximately 2,500 pounds (1134 kgs) of satellite mass will
survive reentry, including 1,000 pounds (453 kgs) of propellant fuel
(hydrazine), a hazardous material.
 
Although the chances of an impact in a populated area are small, the
potential consequences would be of enough concern to consider mitigating
actions. Therefore, the President has decided to take action to mitigate the
risk to human lives by engaging the non-functioning satellite. Because our
missile defense system is not designed to engage satellites, extraordinary
measures have been taken to temporarily modify three sea-based tactical
missiles and three ships to carry out the engagement.
 
Based on modeling and analysis, our officials have high confidence that the
engagement will be successful. As for when this engagement will occur, we
will determine the optimal time, location, and geometry for a successful
engagement based on a number of factors. As the satellite's path continues
to decay, there will be a window of opportunity between late February and
early March to conduct this engagement. The decision to engage the satellite
has to be made before a precise prediction of impact location is available.
 
Contact with hydrazine is hazardous. Direct contact with skin or eyes,
ingestion or inhalations from hydrazine released from the tank upon impact
could result in immediate danger. If this operation is successful, the
hydrazine will then no longer pose a risk to humans.
 
The U.S. government has been and continues to track and monitor this
satellite. Various government agencies are planning for the reentry of the
satellite. In the event the engagement is not successful, all appropriate
elements of the U.S. Government are working together to explore options to
mitigate the danger to humans and to ensure that all parties are properly
prepared to respond. In the unlikely event satellite pieces land in a
populated area, people are strongly advised to avoid the impact area until
trained hazardous materials (HAZMAT) teams are able to properly dispose of
any remaining hydrazine.

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[meteorite-list] NEW FALL?! Need help from the list.

2008-02-15 Thread Michael Gilmer
Hi All,

A friend of mine managed to catch what appears to be
fireball with an impact on his webcam.  He is an
amateur astronomer with a webcam setup and caught the
fireball on a time lapse sequence.

Can anyone with some experience watch this video and
render an informed opinion?  And if this is a meteor
streaking in and hitting the Earth, where should he
report this to?

http://www.wunderground.com/webcams/Strgazr27/1/video.html?month=02year=2008filename=current.flv


Pay attention to the first 10 seconds or so of the
video.
Click on the play icon and watch from the left side
of the screen.

My friend's description of the video :

This was taken looking NW out of my second story
bedroom window. This would be looking towards the
Westchester NY area just N or New York City. 

Any input or thoughts on what to do with this?

MikeG

PS - I'd love to go hunt it down, but I am not free
to travel! (assuming it's a meteorite)




  

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[meteorite-list] re A possible con job

2008-02-15 Thread Pete Shugar
And the winner is 
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemitem=250216177459

Pete

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[meteorite-list] Looking for a good explanation for this one...

2008-02-15 Thread Dave Gheesling
Assuming that unbrecciated chondrites were formed out of
yet-undifferentiated material at our solar system's beginning, how does
(what appears to be) a pyroxene inclusion wind up in an H4?  Photos below:

http://www.fallingrocks.com/Collections/Millen.htm

Thanks,

Dave

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Re: [meteorite-list] re A possible con job

2008-02-15 Thread Dave Gheesling
No negative feedback, anyway...

-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Pete
Shugar
Sent: Friday, February 15, 2008 9:58 PM
To: Meteorite-list@meteoritecentral.com
Subject: [meteorite-list] re A possible con job

 And the winner is 
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemitem=250216177459
Pete

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Re: [meteorite-list] NEW FALL?! Need help from the list.

2008-02-15 Thread Chris Peterson
This does look like a fireball. Its intensity profile and lack of 
terminal explosion makes me think it was fairly high altitude. Since it 
disappears over the horizon, I'd estimate that it stopped burning 
several hundred miles away, probably near Lake Ontario. I doubt it 
produced meteorites. Maybe one of the allsky cameras in the Toronto area 
caught this as well.


Chris

*
Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com


- Original Message - 
From: Michael Gilmer [EMAIL PROTECTED]

To: meteorite-list@meteoritecentral.com
Sent: Friday, February 15, 2008 7:31 PM
Subject: [meteorite-list] NEW FALL?! Need help from the list.



Hi All,

A friend of mine managed to catch what appears to be
fireball with an impact on his webcam.  He is an
amateur astronomer with a webcam setup and caught the
fireball on a time lapse sequence.

Can anyone with some experience watch this video and
render an informed opinion?  And if this is a meteor
streaking in and hitting the Earth, where should he
report this to?

http://www.wunderground.com/webcams/Strgazr27/1/video.html?month=02year=2008filename=current.flv


Pay attention to the first 10 seconds or so of the
video.
Click on the play icon and watch from the left side
of the screen.

My friend's description of the video :

This was taken looking NW out of my second story
bedroom window. This would be looking towards the
Westchester NY area just N or New York City. 

Any input or thoughts on what to do with this?

MikeG

PS - I'd love to go hunt it down, but I am not free
to travel! (assuming it's a meteorite)


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Re: [meteorite-list] NEW FALL?! Need help from the list.

2008-02-15 Thread Mark Hodges
I'm not even sure it is a meteor. This is 24 hours of time lapse 
compressed into 15 seconds, it's hard to tell for sure but looking at 
the time code as the light moves across the sky

it seems to take quite awhile.

Mark

Michael Gilmer wrote:


Hi All,

A friend of mine managed to catch what appears to be
fireball with an impact on his webcam.  He is an
amateur astronomer with a webcam setup and caught the
fireball on a time lapse sequence.

Can anyone with some experience watch this video and
render an informed opinion?  And if this is a meteor
streaking in and hitting the Earth, where should he
report this to?

http://www.wunderground.com/webcams/Strgazr27/1/video.html?month=02year=2008filename=current.flv


Pay attention to the first 10 seconds or so of the
video.
Click on the play icon and watch from the left side
of the screen.

My friend's description of the video :

This was taken looking NW out of my second story
bedroom window. This would be looking towards the
Westchester NY area just N or New York City. 

Any input or thoughts on what to do with this?

MikeG

PS - I'd love to go hunt it down, but I am not free
to travel! (assuming it's a meteorite)




 

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[meteorite-list] Mecurian meteorites

2008-02-15 Thread Pete Shugar
Of the three listed, Greg, which would you consider 
as the front runner? I hope it's NWA 2999 as that's the 
only one I have of those three that you've listed.

Pete

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