[meteorite-list] Facebook Groups for Buying/Selling Meteorites, Rocks, and Fossils

[Galactic Stone & Ironworks via Meteorite-list]

Hi Folks,

If you find yourself on Facebook, here are a couple of groups for
buying-selling-trading meteorites and rocks. They are
tightly-moderated and kept free of scammers.

Meteorite Classifieds : https://www.facebook.com/groups/meteoriteclassifieds/

Internet Rock and Mineral Show : https://www.facebook.com/groups/mineralshow/

USA Fossil Exchange : https://www.facebook.com/groups/USAFossils/

Best regards,

MikeG

www.galactic-stone.com
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[meteorite-list] Uranus May Have Two Undiscovered Moons

[Ron Baalke via Meteorite-list]

http://www.jpl.nasa.gov/news/news.php?feature=6657

Uranus May Have Two Undiscovered Moons
Jet Propulsion Laboratory
October 21, 2016

NASA's Voyager 2 spacecraft flew by Uranus 30 years ago, but researchers 
are still making discoveries from the data it gathered then. A new study 
led by University of Idaho researchers suggests there could be two tiny, 
previously undiscovered moonlets orbiting near two of the planet's rings.

Rob Chancia, a University of Idaho doctoral student, spotted key patterns 
in the rings while examining decades-old images of Uranus' icy rings taken 
by Voyager 2 in 1986. He noticed the amount of ring material on the edge 
of the alpha ring -- one of the brightest of Uranus' multiple rings -- 
varied periodically. A similar, even more promising pattern occurred in 
the same part of the neighboring beta ring.

"When you look at this pattern in different places around the ring, the 
wavelength is different -- that points to something changing as you go 
around the ring. There's something breaking the symmetry," said Matt Hedman, 
an assistant professor of physics at the University of Idaho, who worked 
with Chancia to investigate the finding. Their results will be published 
in The Astronomical Journal and have been posted to the pre-press site 
arXiv.

Chancia and Hedman are well-versed in the physics of planetary rings: 
both study Saturn's rings using data from NASA's Cassini spacecraft, which 
is currently orbiting Saturn. Data from Cassini have yielded new ideas 
about how rings behave, and a grant from NASA allowed Chancia and Hedman 
to examine Uranus data gathered by Voyager 2 in a new light. Specifically, 
they analyzed radio occultations -- made when Voyager 2 sent radio waves 
through the rings to be detected back on Earth -- and stellar occultations, 
made when the spacecraft measured the light of background stars shining 
through the rings, which helps reveal how much material they contain.

They found the pattern in Uranus' rings was similar to moon-related structures 
in Saturn's rings called moonlet wakes.

The researchers estimate the hypothesized moonlets in Uranus' rings would 
be 2 to 9 miles (4 to 14 kilometers) in diameter -- as small as some identified 
moons of Saturn, but smaller than any of Uranus' known moons. Uranian 
moons are especially hard to spot because their surfaces are covered in 
dark material.

"We haven't seen the moons yet, but the idea is the size of the moons 
needed to make these features is quite small, and they could have easily 
been missed," Hedman said. "The Voyager images weren't sensitive enough 
to easily see these moons."

Hedman said their findings could help explain some characteristics of 
Uranus' rings, which are strangely narrow compared to Saturn's. The moonlets, 
if they exist, may be acting as "shepherd" moons, helping to keep the 
rings from spreading out. Two of Uranus' 27 known moons, Ophelia and Cordelia, 
act as shepherds to Uranus' epsilon ring.

"The problem of keeping rings narrow has been around since the discovery 
of the Uranian ring system in 1977 and has been worked on by many dynamicists 
over the years," Chancia said. "I would be very pleased if these proposed 
moonlets turn out to be real and we can use them to approach a solution."

Confirming whether or not the moonlets actually exist using telescope 
or spacecraft images will be left to other researchers, Chancia and Hedman 
said. They will continue examining patterns and structures in Uranus' 
rings, helping uncover more of the planet's many secrets.

"It's exciting to see Voyager 2's historic Uranus exploration still 
contributing 
new knowledge about the planets," said Ed Stone, project scientist for 
Voyager, based at Caltech, Pasadena, California.

Voyager 2 and its twin, Voyager 1, were launched 16 days apart in 1977. 
Both spacecraft flew by Jupiter and Saturn, and Voyager 2 also flew by 
Uranus and Neptune. Voyager 2 is the longest continuously operated spacecraft. 
It is expected to enter interstellar space in a few years, joining Voyager 
1, which crossed over in 2012. Though far past the planets, the mission 
continues to send back unprecedented observations of the space environment 
in the solar system, providing crucial information on the environment 
our spacecraft travel through as we explore farther and farther from home.

NASA's Jet Propulsion Laboratory, a division of Caltech in Pasadena, 
California, 
built the twin Voyager spacecraft and operates them for the Heliophysics 
Division within NASA's Science Mission Directorate in Washington.

For more information about Voyager, visit:

http://voyager.jpl.nasa.gov

News Media Contact
Elizabeth Landau
Jet Propulsion Laboratory, Pasadena, Calif.
818-354-6425
elizabeth.lan...@jpl.nasa.gov

Tara Roberts
University of Idaho Communications
208-885-2097
trobe...@uidaho.edu

Written by Tara Roberts

2016-276

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[meteorite-list] Citizen Scientists Seek South Pole 'Spiders' on Mars

[Ron Baalke via Meteorite-list]

http://www.jpl.nasa.gov/news/news.php?feature=6654

Citizen Scientists Seek South Pole 'Spiders' on Mars
Jet Propulsion Laboratory
October 20, 2016

[Image]
This image shows spidery channels eroded into Martian ground. This image 
shows spidery channels eroded into Martian ground. It is a Sept. 12, 2016, 
example from HiRISE camera high-resolution observations of more than 20 
places that were chosen in 2016 on the basis of about 10,000 volunteers' 
examination of Context Camera lower-resolution views of larger areas. 
Image credit: NASA/JPL-Caltech/Univ. of Arizona

Ten thousand volunteers viewing images of Martian south polar regions 
have helped identify targets for closer inspection, yielding new insights 
about seasonal slabs of frozen carbon dioxide and erosional features known 
as "spiders."

>From the comfort of home, the volunteers have been exploring the surface 
of Mars by reviewing images from the Context Camera (CTX) on NASA's Mars 
Reconnaissance Orbiter and identifying certain types of seasonal terrains 
near Mars' south pole. These efforts by volunteers using the "Planet Four: 
Terrains" website have aided scientists who plan observations with the 
same orbiter's High Resolution Imaging Science Experiment (HiRISE) camera. 
HiRISE photographs much less ground but in much greater detail than CTX.

Volunteers have helped identify more than 20 regions in mid-resolution 
images to investigate with higher resolution. "It's heartwarming to see 
so many citizens of planet Earth donate their time to help study Mars," 
said HiRISE Deputy Principal Investigator Candice Hansen, of the Planetary 
Science Institute, Tucson, Arizona. "Thanks to the discovery power of 
so many people, we're using HiRISE to take images of places we might not 
have studied without this assistance."

Planetary scientist Meg Schwamb, of the Gemini Observatory, Hilo, Hawaii, 
presented results from the first year of this citizen science project 
Thursday at the annual meeting of the American Astronomical Society's 
Division for Planetary Sciences and the European Planetary Science Congress, 
in Pasadena, California.

The type of terrain called spiders, or "araneiform" (from the Latin word 
for spiders), is characterized by multiple channels converging at a point, 
resembling a spider's long legs. Previous studies concluded that this 
ground texture results from extensive sheets of ice thawing bottom-side 
first as the ice is warmed by the ground below it. Thawed carbon dioxide 
gas builds up pressure, and the gas escapes through vents in the overlying 
sheet of remaining ice, pulling dust with it. This process carves the 
channels that resemble legs of a spider.

"The trapped carbon dioxide gas that carves the spiders in the ground 
also breaks through the thawing ice sheet," Schwamb said. "It lofts dust 
and dirt that local winds then sculpt into hundreds of thousands of dark 
fans that are observed from orbit. For the past decade, HiRISE has been 
monitoring this process on other parts of the south pole. The 20 new regions 
have been added to this seasonal monitoring campaign. Without the efforts 
of the public, we wouldn't be able to see how these regions evolve over 
the spring and summer compared with other regions."  

Some of the HiRISE observations guided by the volunteers' input confirmed 
"spider" terrain in areas not previously associated with carbon dioxide 
slab ice.

"From what we've learned about spider terrain elsewhere, slab ice must 
be involved at the locations of these new observations, even though we 
had no previous indication of it there," Hansen said. "Maybe it's related 
to the erodability of the terrain."

Some of the new observations targeted with information from the volunteers 
confirm spiders in areas where the ground surface is made of material 
ejected from impact craters, blanketing an older surface. "Crater ejecta 
blankets are erodible. Perhaps on surfaces that are more erodable, relative 
to other surfaces, slab ice would not need to be present as long, or as 
thick, for spiders to form," Hansen said. "We have new findings, and new 
questions to answer, thanks to all the help from volunteers."

The productive volunteer participation continues, and new CTX images have 
been added for examining additional areas in Mars' south polar region. 
Planet Four: Terrains is on a platform released by the Zooniverse, which 
hosts 48 projects that enlist people worldwide to contribute to discoveries 
in fields ranging from astronomy to zoology. For information about how 
to participate, visit:

http://terrains.planetfour.org

With CTX, HiRISE and four other instruments, the Mars Reconnaissance Orbiter 
has been investigating Mars since 2006.

Malin Space Science Systems, San Diego, built and operates CTX. The University 
of Arizona, Tucson, operates HiRISE, which was built by Ball Aerospace 
& Technologies Corp. of Boulder, Colorado. NASA's Jet Propulsion Laboratory, 
a division of Caltech in Pasadena, 

[meteorite-list] New Horizons: Possible Clouds on Pluto, Next Target is Reddish

[Ron Baalke via Meteorite-list]

http://www.jpl.nasa.gov/news/news.php?feature=6651

New Horizons: Possible Clouds on Pluto, Next Target is Reddish
Jet Propulsion Laboratory
October 18, 2016

[Image]
Scientists from NASA's New Horizons mission have spotted signs of long 
run-out landslides on Pluto's largest moon, Charon. This perspective view 
of a chasm on Charon uses stereo reconstruction of images taken by two 
cameras on New Horizons, supplemented by a "shape-from-shading" algorithm. 
Image Credit: NASA/Johns Hopkins University Applied Physics 
Laboratory/Southwest 
Research Center

The next target for NASA's New Horizons mission -- which made a historic 
flight past Pluto in July 2015 -- apparently bears a colorful resemblance 
to its famous, main destination.

NASA's Hubble Space Telescope data suggests that 2014 MU69, a small Kuiper 
Belt object (KBO) about a billion miles (1.6 billion kilometers) beyond 
Pluto, is as red, if not redder, than Pluto. This is the first hint at 
the surface properties of the far-flung object that New Horizons will 
survey on Jan. 1, 2019.

Mission scientists are discussing this and other Pluto and Kuiper Belt 
findings this week at the American Astronomical Society Division for Planetary 
Sciences (DPS) and European Planetary Science Congress (EPSC) meeting 
in Pasadena, California.

"We're excited about the exploration ahead for New Horizons, and also 
about what we are still discovering from Pluto flyby data," said Alan 
Stern, principal investigator from Southwest Research Institute in Boulder, 
Colorado. "Now, with our spacecraft transmitting the last of its data 
from last summer's flight through the Pluto system, we know that the next 
great exploration of Pluto will require another mission to be sent there."

Stern said that Pluto's complex, layered atmosphere is hazy and appears 
to be mostly free of clouds, but the team has spied a handful of potential 
clouds in images taken with New Horizons' cameras. "If there are clouds, 
it would mean the weather on Pluto is even more complex than we imagined," 
Stern said.

Scientists already knew from telescope observations that Pluto's icy surface 
below that atmosphere varied widely in brightness. Data from the flyby 
not only confirms that, it also shows the brightest areas (such as sections 
of Pluto's large heart-shaped region) are among the most reflective in 
the solar system. "That brightness indicates surface activity," said Bonnie 
Buratti, a science team co-investigator from NASA's Jet Propulsion Laboratory 
in Pasadena. "Because we see a pattern of high surface reflectivity equating 
to activity, we can infer that the dwarf planet Eris, which is known to 
be highly reflective, is also likely to be active."

While Pluto shows many kinds of activity, one surface process apparently 
missing is landslides. Surprisingly, though, they have been spotted on 
Pluto's largest moon, Charon, itself some 750 miles (1,200 kilometers) 
across. "We've seen similar landslides on other rocky and icy planets, 
such as Mars and Saturn's moon Iapetus, but these are the first landslides 
we've seen this far from the sun, in the Kuiper Belt," said Ross Beyer, 
a science team researcher from Sagan Center at the SETI Institute and 
NASA Ames Research Center, Moffett Field, California. "The big question 
is will they be detected elsewhere in the Kuiper Belt?"

Both Hubble and cameras on the New Horizons spacecraft have been aimed 
at KBOs over the past two years, with New Horizons taking advantage of 
its unique vantage point in the Kuiper Belt to observe nearly a dozen 
small worlds in this barely explored region. MU69 is actually the smallest 
KBO to have its color measured -- and scientists have used that data to 
confirm the object is part of the so-called cold classical region of the 
Kuiper Belt, which is believed to contain some of the oldest, most prehistoric 
material in the solar system.

"The reddish color tells us the type of Kuiper Belt object 2014 MU69 is," 
said Amanda Zangari, a New Horizons post-doctoral researcher from Southwest 
Research Institute. "The data confirms that on New Year's Day 2019, New 
Horizons will be looking at one of the ancient building blocks of the 
planets."

The New Horizons spacecraft is currently 3.4 billion miles (5.5 billion 
kilometers) from Earth and about 340 million miles (540 million kilometers) 
beyond Pluto, speeding away from the sun at about nine miles (14 kilometers) 
every second. About 99 percent of the data New Horizons gathered and stored 
on its digital recorders during the Pluto encounter has now been transmitted 
back to Earth, with that transmission set to be completed Oct. 23. New 
Horizons has covered about one-third of the distance from Pluto to its 
next flyby target, which is now about 600 million miles (nearly 1 billion 
kilometers) ahead.

The Johns Hopkins University Applied Physics Laboratory in Laurel, Maryland, 
designed, built and operates the New Horizons spacecraft, and manages 
the 

[meteorite-list] Camera on MRO Shows Signs of Latest Mars Lander Schiaparelli

[Ron Baalke via Meteorite-list]

http://www.jpl.nasa.gov/news/news.php?feature=6658

Camera on Mars Orbiter Shows Signs of Latest Mars Lander
Jet Propulsion Laboratory
October 21, 2016

[Images]
This comparison of before-and-after images. This comparison of before-and-after 
images shows two spots that likely appeared in connection with the Oct. 
19, 2016, Mars arrival of the European Space Agency's Schiaparelli test 
lander. The images are from the Context Camera on NASA's Mars Reconnaissance 
Orbiter. Image credit: NASA/JPL-Caltech/MSSS

NASA's Mars Reconnaissance Orbiter has identified new markings on the 
surface of the Red Planet that are believed to be related to Europe's 
Schiaparelli test lander, which arrived at Mars on Oct. 19.

The new image shows a bright spot that may be Schiaparelli's parachute, 
and a larger dark spot interpreted as resulting from the impact of the 
lander itself following a much longer free fall than planned, after thrusters 
switched off prematurely. It was taken by the Context Camera (CTX) on 
NASA's Mars Reconnaissance Orbiter and is available online, as a 
before-and-after 
comparison with an image from May 2016, at:

http://mars.nasa.gov/multimedia/images/?ImageID=8131

The location information gained from acquiring the CTX image will be used 
for imaging the site with the Mars Reconnaissance Orbiter's High Resolution 
Imaging Science Experiment (HiRISE) camera. European Space Agency (ESA) 
and NASA researchers will analyze the images for information about the 
sequence of events on Schiaparelli's landing day, possibly supplementing 
data transmitted from the test module during its descent.

The location of the bright spot interpreted as the parachute is 353.79 
degrees east longitude, 2.07 degrees south latitude, closely matching 
ESA's calculation for the landing location based on landing-day data. 
This is within the planned landing area and about 3.3 miles (5.4 kilometers) 
west of the center of the landing target. A dark spot is larger and elliptical, 
approximately 50 by 130 feet (15 by 40 meters). It may be where the lander 
reached the surface and exposed darker ground.

The test lander is part of ESA's ExoMars 2016 mission, which placed the 
Trace Gas Orbiter into orbit around Mars on Oct. 19. The orbiter will 
investigate Mars' atmosphere and provide relay communications capability 
for landers and rovers on the surface.

With CTX, HiRISE and four other instruments, the Mars Reconnaissance Orbiter 
has been investigating Mars since 2006.

Malin Space Science Systems, San Diego, built and operates CTX. NASA's 
Jet Propulsion Laboratory, a division of Caltech in Pasadena, California, 
manages the Mars Reconnaissance Orbiter Project for NASA's Science Mission 
Directorate, Washington. Lockheed Martin Space Systems, Denver, built 
the orbiter and collaborates with JPL to operate it.

News Media Contact
Guy Webster
Jet Propulsion Laboratory, Pasadena, Calif.
818-354-6278
guy.webs...@jpl.nasa.gov

Markus Bauer
European Space Agency, Villanueva de la Cañada, Spain
0031 61 594 3 954
markus.ba...@esa.int

Dwayne Brown / Laurie Cantillo
NASA Headquarters, Washington
202-358-1726 / 202-358-1077
dwayne.c.br...@nasa.gov / laura.l.canti...@nasa.gov

2016-278

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[meteorite-list] ESA Celebrates ExoMars Orbiter Success, Keeps Vigil For Lost Lander

[Ron Baalke via Meteorite-list]

http://spaceflightnow.com/2016/10/19/esa-celebrates-exomars-orbiter-success-keeps-vigil-for-lost-lander/
  

ESA celebrates ExoMars orbiter success, keeps vigil for lost lander
Stephen Clark
SpaceFlight Now
October 19, 2016

A European-built orbiter designed to seek out the source of methane on
Mars slipped into orbit around the red planet Wednesday after a
seven-month interplanetary journey, but mission control lost contact
with an experimental landing probe just before touchdown.

Both spacecraft - part of the joint European-Russian ExoMars program - 
reached Mars around the same time Wednesday for simultaneous maneuvers
to swing into orbit and plunge into the red planet's atmosphere.

The Schiaparelli lander, shaped like a flying saucer with a diameter of
nearly 8 feet (2.4 meters), dived into the Martian atmosphere as
expected around 1442 GMT (10:42 a.m. EDT) Wednesday.

Designed for a technology demonstration mission, Schiaparelli had heat
shield tiles, a parachute and nine rocket thrusters to slow its speed
from 13,000 mph (21,000 kilometers per hour) to zero in less than six
minutes.

But something went wrong in the last phase of the descent, interrupting
a real-time beacon signal sent back to Earth to a vast radio telescope
array in Pune, India. The carrier tone went silent after mission
controllers reported Schiaparelli's supersonic parachute had deployed,
but the signal only told engineers whether the spacecraft was
transmitting, and did not contain telemetry data that might reveal the
root of the problem.

European Space Agency officials waited to receive a recording of
Schiaparelli's beacon signal from the Mars Express orbiter around the
red planet to confirm some sort of glitch with the Indian antennas was
not responsible for the loss of communications.

"We saw the signal through the atmospheric phase - the descent phase. At
a certain point, it stopped," said Paolo Ferri, head of ESA's mission
operations department. "This was unexpected, but we couldn't conclude
anything from that because this very weak signal picked up on the ground
was coming from an experimental tool."

The telescope array in India was never designed to communicate with deep
space missions like Schiaparelli, but engineers added equipment to the
antenna network - the largest in the world - for Wednesday's Mars
landing in hopes of gaining real-time insight into the status of the
mission.

Otherwise, ground controllers would have had to wait for Mars Express
for news on the 1,272-pound (577-kilogram) landing craft.

It turns out the ground team at the European Space Operations Center in
Darmstadt, Germany, had to wait all day Wednesday as data on
Schiaparelli's landing trickled back to Earth and hopes for the
mission's successful landing waned.

The carrier signal from Schiaparelli relayed by Mars Express also
abruptly ended shortly before landing, just as the beacon tone received
in India.

"The Mars Express measurement came - and confirmed exactly the same: the
signal went through the majority of the descent phase, and it stopped at
a certain point that we reckon was before the landing," Ferri said.

"There could be many many reasons for that," Ferri said. "It's clear
these are not good signs, but we will need more information."

The newly-arrived Trace Gas Orbiter, Schiaparelli's mothership, recorded
detailed telemetry broadcast by the lander - not just the beacon signal
- and that data should be beamed back to Earth overnight, according to
Ferri.

"This is fundamental because we should remember that this landing was a
test, and as part of the test, you want to know what happened," Ferri said.

"If the landing were to fail, presumably from TGO we will know what was
the last thing that worked all right," said Jorge Vago, ESA's ExoMars
project scientist, in an interview with Spaceflight Now on Tuesday,
before Schiaparelli's landing attempt.

Officials hope to share more on what they know about Schiaparelli's fate
in a press conference Thursday at 0800 GMT (4 a.m. EDT).

Schiaparelli rode to Mars piggyback on the Trace Gas Orbiter after their
tandem launch March 14 aboard a Russian Proton rocket, then separated
Sunday for the final approach to the planet.

Both ExoMars spacecraft were manufactured by an industrial team led by
Thales Alenia Space.

The orbiter fired its main engine at 1305 GMT (9:05 a.m. EDT), smoothly
slowing the craft's velocity by more than 3,300 mph (1.5 kilometers per
second) during a 139-minute burn.

The final few minutes of the make-or-break rocket maneuver occurred as
the spacecraft flew behind Mars, temporarily cutting off communications.
When mission control regained contact with the Trace Gas Orbiter,
telemetry showed the probe was healthy and had completed the orbit
insertion burn as planned.

The confirmation sparked a round of applause inside the ExoMars control
center, but attention quickly turned back to Schiaparelli.

"Part of the mission is a clear go," said Don McCoy, ESA's ExoMars

Re: [meteorite-list] Article : 21st Century Meteorite Falls, Part Two

[Graham Ensor via Meteorite-list]

Apparently I just found outanother hoax video...shamelooked
convincing to me.

On Fri, Oct 21, 2016 at 4:00 PM, Graham Ensor 
wrote:

> But this looks promising Finbarr :-)...a couple of days ago...seems to be
> heading for land over the Bristol channel into Southern UK perhaps when you
> check out the map it was too high and far on to land in the Bristol
> channel http://travel.aol.co.uk/2016/10/20/flaming-meteor-crashes-
> into-sea-in-south-wales/?icid=maing-grid7%7Cmain5%7Cdl1%
> 7Csec1_lnk2%26pLid%3D-1309516890_uk
>
> Graham
>
> On Thu, Oct 20, 2016 at 10:02 PM, finbarr connolly via Meteorite-list <
> meteorite-list@meteoritecentral.com> wrote:
>
>> I find the relatively static number of falls very surprising, considering
>> the proliferation of cameras compared to earlier times. Still waiting for
>> our first British Isles fall of the 21st century!
>>
>> Finbarr.
>>
>> On Thu, Oct 20, 2016 at 9:46 PM, Carl Agee via Meteorite-list <
>> meteorite-list@meteoritecentral.com> wrote:
>>
>>> Always an interesting topic!
>>>
>>> A couple of things come to mind:
>>>
>>> Morocco has 8 falls in the 21st century, which you suggest has to do
>>> with the meteorite-savvy population and desert terrain. California has
>>> a very similar area and population density -- also a west facing coast
>>> line, a fair amount of desert, and a mountain range. How many 21st
>>> century falls in CA?
>>>
>>> We are over-due for a lunar falls! There are now 265 classified lunars
>>> -- all of them finds. Compare that with 5 martian falls and 177
>>> classified finds, or for example mesosiderites with 6 falls and 261
>>> classified finds. Aubrites have 9 falls and 63 finds.
>>>
>>> Brachinites have no falls (40 finds), any others?
>>>
>>> Carl
>>>
>>>
>>> *
>>> Carl B. Agee
>>> Director and Curator, Institute of Meteoritics
>>> Professor, Earth and Planetary Sciences
>>> MSC03 2050
>>> University of New Mexico
>>> Albuquerque NM 87131-1126
>>>
>>> Tel: (505) 750-7172
>>> Fax: (505) 277-3577
>>> Email: a...@unm.edu
>>> http://meteorite.unm.edu/people/carl_agee/
>>> http://compres.us/about-us/compres-president
>>>
>>>
>>>
>>> On Thu, Oct 20, 2016 at 1:57 PM, Galactic Stone & Ironworks via
>>> Meteorite-list  wrote:
>>> > "...In the first 10 years of the 21st Century, we have seen 58 new
>>> > meteorite falls (as of this writing). As we close out the first decade
>>> > of this new century, let us examine some of the facts and numbers
>>> > surrounding these recent falls. For the purposes of this article, we
>>> > will only examine those falls which have been officially recognized by
>>> > the Meteoritical Society. There have been a few documented falls that
>>> > have not been approved yet (Zunhua and Cartersville), so these falls
>>> > will not be included in this analysis..."
>>> >
>>> > I wrote the above introductory paragraph nearly 6 years ago (early
>>> > 2010) when I did my first analysis of recent meteorite fall
>>> > statistics. More than 5 years later, we have had 40 more
>>> > officially-recognized falls. In that same span of time, we have also
>>> > had Breja, Addison, Oslo, Mahbse Aarraid, and the recent White
>>> > Mountains fall that are well documented falls that have not been
>>> > approved or published in the Met Bull.  A quick look at the overall
>>> > numbers shows a very slight increase in the number of approved falls
>>> > in the last 6 years compared to the previous 9.5 years. This is likely
>>> > due, in part, to increased awareness of meteorites and increased
>>> > recovery rates.
>>> >
>>> > Also, it seems that NonCom has been moving a bit faster to approve new
>>> > falls and publish them in the Met Bull. Taking all of these recent
>>> > falls into account, we have now had 98 official falls since the year
>>> > 2000. If one chooses to include the recent unofficial falls which will
>>> > likely be approved in the near future, then we have had over 100
>>> > meteorite falls in the 21st century.
>>> >
>>> > So, in the first 16 years (2000-2016) of this century, we have
>>> > averaged just over 6 approved falls per year.  This represents an
>>> > uptick in the average number of approved falls compared to the
>>> > previous period of 2000-2010 where the average was 5. This is not so
>>> > clear cut though, because a couple of older falls were approved in the
>>> > years since, including Zunhua (as it was known in 2010), which was
>>> > approved in late 2015 as Xinglongquan. For tidy conversational
>>> > purposes, it's safe to say that we expect about 5 to 6 new approved
>>> > falls each year. A number of 5 per year being more conservative and
>>> > closer to 6 if you take into account that some falls are not recovered
>>> > or approved until a year or more after the date of their fall.
>>> >
>>> > Now let's take a look at the numbers and have some fun with them :
>>> > Which petrologic type do you think 

Re: [meteorite-list] Article : 21st Century Meteorite Falls, Part Two

[Graham Ensor via Meteorite-list]

But this looks promising Finbarr :-)...a couple of days ago...seems to be
heading for land over the Bristol channel into Southern UK perhaps when you
check out the map it was too high and far on to land in the Bristol
channel
http://travel.aol.co.uk/2016/10/20/flaming-meteor-crashes-into-sea-in-south-wales/?icid=maing-grid7%7Cmain5%7Cdl1%7Csec1_lnk2%26pLid%3D-1309516890_uk

Graham

On Thu, Oct 20, 2016 at 10:02 PM, finbarr connolly via Meteorite-list <
meteorite-list@meteoritecentral.com> wrote:

> I find the relatively static number of falls very surprising, considering
> the proliferation of cameras compared to earlier times. Still waiting for
> our first British Isles fall of the 21st century!
>
> Finbarr.
>
> On Thu, Oct 20, 2016 at 9:46 PM, Carl Agee via Meteorite-list <
> meteorite-list@meteoritecentral.com> wrote:
>
>> Always an interesting topic!
>>
>> A couple of things come to mind:
>>
>> Morocco has 8 falls in the 21st century, which you suggest has to do
>> with the meteorite-savvy population and desert terrain. California has
>> a very similar area and population density -- also a west facing coast
>> line, a fair amount of desert, and a mountain range. How many 21st
>> century falls in CA?
>>
>> We are over-due for a lunar falls! There are now 265 classified lunars
>> -- all of them finds. Compare that with 5 martian falls and 177
>> classified finds, or for example mesosiderites with 6 falls and 261
>> classified finds. Aubrites have 9 falls and 63 finds.
>>
>> Brachinites have no falls (40 finds), any others?
>>
>> Carl
>>
>>
>> *
>> Carl B. Agee
>> Director and Curator, Institute of Meteoritics
>> Professor, Earth and Planetary Sciences
>> MSC03 2050
>> University of New Mexico
>> Albuquerque NM 87131-1126
>>
>> Tel: (505) 750-7172
>> Fax: (505) 277-3577
>> Email: a...@unm.edu
>> http://meteorite.unm.edu/people/carl_agee/
>> http://compres.us/about-us/compres-president
>>
>>
>>
>> On Thu, Oct 20, 2016 at 1:57 PM, Galactic Stone & Ironworks via
>> Meteorite-list  wrote:
>> > "...In the first 10 years of the 21st Century, we have seen 58 new
>> > meteorite falls (as of this writing). As we close out the first decade
>> > of this new century, let us examine some of the facts and numbers
>> > surrounding these recent falls. For the purposes of this article, we
>> > will only examine those falls which have been officially recognized by
>> > the Meteoritical Society. There have been a few documented falls that
>> > have not been approved yet (Zunhua and Cartersville), so these falls
>> > will not be included in this analysis..."
>> >
>> > I wrote the above introductory paragraph nearly 6 years ago (early
>> > 2010) when I did my first analysis of recent meteorite fall
>> > statistics. More than 5 years later, we have had 40 more
>> > officially-recognized falls. In that same span of time, we have also
>> > had Breja, Addison, Oslo, Mahbse Aarraid, and the recent White
>> > Mountains fall that are well documented falls that have not been
>> > approved or published in the Met Bull.  A quick look at the overall
>> > numbers shows a very slight increase in the number of approved falls
>> > in the last 6 years compared to the previous 9.5 years. This is likely
>> > due, in part, to increased awareness of meteorites and increased
>> > recovery rates.
>> >
>> > Also, it seems that NonCom has been moving a bit faster to approve new
>> > falls and publish them in the Met Bull. Taking all of these recent
>> > falls into account, we have now had 98 official falls since the year
>> > 2000. If one chooses to include the recent unofficial falls which will
>> > likely be approved in the near future, then we have had over 100
>> > meteorite falls in the 21st century.
>> >
>> > So, in the first 16 years (2000-2016) of this century, we have
>> > averaged just over 6 approved falls per year.  This represents an
>> > uptick in the average number of approved falls compared to the
>> > previous period of 2000-2010 where the average was 5. This is not so
>> > clear cut though, because a couple of older falls were approved in the
>> > years since, including Zunhua (as it was known in 2010), which was
>> > approved in late 2015 as Xinglongquan. For tidy conversational
>> > purposes, it's safe to say that we expect about 5 to 6 new approved
>> > falls each year. A number of 5 per year being more conservative and
>> > closer to 6 if you take into account that some falls are not recovered
>> > or approved until a year or more after the date of their fall.
>> >
>> > Now let's take a look at the numbers and have some fun with them :
>> > Which petrologic type do you think was the most common type recovered
>> > during the first 16 years of this century?
>> >
>> > Well, it's safe to say that it is an ordinary chondrite. No surprises
>> there.
>> >
>> > More specifically, we have a tie between L6 and H5 chondrites at 23
>> each.
>> >
>> > Anyone want 

[meteorite-list] AD: Large Lunar and Martian meteorite slices on offer

[Martin Goff via Meteorite-list]

Paid AD 11 of 12


Hi all,

I have some nice lunar and martian meteorite slices on offer with huge
surface area for the weight :-)


0.24g Lunar meteorite slice with $0.99 start price and no reserve!

(http://www.ebay.com/itm/252597062280?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649)


1.975g NWA 7397 shergottite slice

(http://www.ebay.com/itm/252597126026?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649)


2.53g NWA 10441 Martian Shergottite slice.

(http://www.ebay.com/itm/252597027125?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649)



Cheers

Martin

-- 
Martin Goff
www.msg-meteorites.co.uk
IMCA #3387
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[meteorite-list] Meteorite Picture of the Day

[Paul Swartz via Meteorite-list]

Today's Meteorite Picture of the Day: Toluca

Contributed by: Bernd Pauli

http://www.tucsonmeteorites.com/mpodmain.asp?DD=10/21/2016
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