Hello from Sunny Texas, under clear and starry-eyed skies at the moment, A few stones were found right at the time of the fall, however, they were not definitively identified as meteorites - though that was the suspicion and they were saved.
We (Doug Dawn, Dmitry Sadilenko, Sergey Petukov) drove across the country and estimated the location of the strewn field within 48 hours of the event. With a bit of tenacity, scarcely four hours after the second day, thanks to the help of some Texas-sized hospitality, we arrived in the strewn field and found our first couple of stones and I had the distinct pleasure of shaking the finders hand and removing any lingering doubts in his mind that he had meteorites fresh from Heaven's farm. After the initial success, my good friend and asteroid hunter, Rob Matson of Los Angeles, joined up with the team. We have found some stones, but more are being found by others, and we really expect larger masses to be found, though hard work in the field definitely gets you wondering if just because such a meteoritical spectacle drops one stone, should it drop the thousands we keep expecting to see? The TKW is rapidly evolving, but the area is being hit quite hard by hunters already. This doesn't seem to be a dense fall, and some areas are very easy to search, though bramble in other areas effectively keeps those off limits. All land is private and most families keep their gun collections well oiled. In our case, the big-hearts of the landowners have humbled easily as much as the witness reports of the bolide's fragmenting itself. This is at odds with some other reports, only because residents of the area treasure their privacy and were completely overwhelmed by the wave of treasure hunters that descended. We almost lost our permission to hunt when they believed that we were somehow responsible for several meteorite hunters showing up with a news crews. Besides being quite busy, I promised to respect the anonymity of our hosts as a condition of our search, and this evening we reaped the benefits of a delicious home-cooked dinner prepared by the caring hands of our hosts at their dinner table. There is a great Texas steakhouse on I-35 which adds to the flavor for anyone wanting to experience Texas culture, cowboys and pretty cowgirls from West, TX. It has been an incredible last few days, which started by being the first to walk in a virgin strewn field, though my mother had some problems (she seems better now) that have somewhat muted what will undoubtedly be some of the most memorable moments of my life. It is way past bedtime and I will post more tomorrow. The meteorite itself is moderately to highly shocked and has a very bright, light, interior and veins of troilite and nodules of metal, and the majority of stones found are fully fusion crusted. More on the classification on Saturday. We certainly were not in a mass-laden portion of the strewn field, other hunters please take note; more likely just a place where a minor fragmentation impacted. In any case, we are committed to getting the science done so everyone else can rest assured that we have already gladly provided the mass requirements necessary for this honor. All in all, a very humbling experience for many reasons. To pick up a piece of a falling star and I thought, detect a faint sulfurous odor. It seems a dog even caught the scent of a meteorite and laid it down on the owners porch!
Best wishes and clear skies, Doug
Written by: Doug Dawn posted to the MetList- Meteorite-list@meteoritecentral.com
22 February 2009
20 February 2009
Mike Farmer`s Team Finds Three More Today 19FEB09
West, Texas Meteorite found by (c) Michael Farmer 2009I just spoke with Mike Farmer on the telephone and they have found three more meteorites today. He said that the area is mostly farm and pasture land making it not the most idea for hunting conditions.
UNT astronomy workers say they found 2 samples of meteor 19FEB09
UNT astronomy workers say they found 2 samples of meteor
03:14 PM CST on Thursday, February 19, 2009
By SARAH PERRY / The Dallas Morning News
Ron DiIulio slept for only an hour last night.
The director of the planetarium and astronomy lab program at the University of North Texas couldn’t help but stay awake and study the pieces of a meteorite he found with a co-worker Wednesday.
MAX FAULKNER/Special Contributor Ron DiIulio (left), director of UNT's planetarium and astronomy lab program, and UNT observatory manager Preston Starr found these fragments, believed to be from a meteor that burned up in the earth's atmosphere earlier this week, in a pasture in West.
DiIulio and Preston Starr, the observatory manager at UNT, discovered the remnants of a meteor spotted shooting across the Texas sky Sunday.
They found the two walnut-sized fragments off a road in West, a town about 70 miles south of Dallas.
DiIulio has found other meteorites before, but these pieces are special. “To get something from space ... that’s a once-in-a-lifetime thing,” he said. “And these are pristine.”
Immediately after learning about the sighting, the two men began to pinpoint the possible location with information from witnesses. The pair systematically mapped the locations and narrowed down the spot to somewhere near Fayetteville, about 230 miles south of Dallas.
They guessed wrong.
DiIulio said he and Starr wound their way to West and stopped at the Czech Bakery for a snack. A farmer, who noticed their official NASA-UNT outfits, approached them and asked what they were doing.
“Are you guys looking for the sonic boom that rattled my walls?” DiIulio recalled the farmer asking.
The farmer told the professors they should head southeast of West.
DiIulio and Starr spotted the sheriff and a deputy at a gas station near the location provided by the farmer. The deputy owned some land nearby and offered to help them find the meteorite.
At 5 p.m., after walking a few minutes down a gravel road, Starr and DiIulio spotted it - a small, charcoal-colored ball. Five minutes later, they found another.
They didn’t use any fancy electronics - just a map, truck and their eyes.
“Imagine that,” DiIulio said. “A little piece of charcoal sitting on a gravel road right there.”
The pair were lucky they found the pieces first, he said. Scientists from Moscow and two men from Tucson were also on the prowl.
DiIulio and Starr wrapped the pieces in a Ziploc bag and took them back to UNT, where they are conducting a radioisotope study today. The study will give clues about other matter in space.
DiIulio said it was important to find the pieces quickly because they start to lose certain characteristics once they hit the earth’s atmosphere.
Alan Rubin, a research geochemist at the University of California, Los Angeles, said the meteorite that landed in Texas is among the most common kinds -- an ordinary chondrite.
He said his lab had been called on to analyzed a piece of the substance -- not from the chunks that DiIulio and Starr found -- and "it's a real meteorite, not a piece of a satellite."
Though meteorites are found all over world, DiIulio considers himself lucky. Mostly what's out there are tiny pieces -- some as small as a grain of sand.
“Every once in a while ... you get this,” he said.
Austin- Fox News Video: http://www.myfoxaustin.com/dpp/news/021909_Meteorite_Pieces_Located_in_West_TX
03:14 PM CST on Thursday, February 19, 2009
By SARAH PERRY / The Dallas Morning News
Ron DiIulio slept for only an hour last night.
The director of the planetarium and astronomy lab program at the University of North Texas couldn’t help but stay awake and study the pieces of a meteorite he found with a co-worker Wednesday.
MAX FAULKNER/Special Contributor Ron DiIulio (left), director of UNT's planetarium and astronomy lab program, and UNT observatory manager Preston Starr found these fragments, believed to be from a meteor that burned up in the earth's atmosphere earlier this week, in a pasture in West.
DiIulio and Preston Starr, the observatory manager at UNT, discovered the remnants of a meteor spotted shooting across the Texas sky Sunday.
They found the two walnut-sized fragments off a road in West, a town about 70 miles south of Dallas.
DiIulio has found other meteorites before, but these pieces are special. “To get something from space ... that’s a once-in-a-lifetime thing,” he said. “And these are pristine.”
Immediately after learning about the sighting, the two men began to pinpoint the possible location with information from witnesses. The pair systematically mapped the locations and narrowed down the spot to somewhere near Fayetteville, about 230 miles south of Dallas.
They guessed wrong.
DiIulio said he and Starr wound their way to West and stopped at the Czech Bakery for a snack. A farmer, who noticed their official NASA-UNT outfits, approached them and asked what they were doing.
“Are you guys looking for the sonic boom that rattled my walls?” DiIulio recalled the farmer asking.
The farmer told the professors they should head southeast of West.
DiIulio and Starr spotted the sheriff and a deputy at a gas station near the location provided by the farmer. The deputy owned some land nearby and offered to help them find the meteorite.
At 5 p.m., after walking a few minutes down a gravel road, Starr and DiIulio spotted it - a small, charcoal-colored ball. Five minutes later, they found another.
They didn’t use any fancy electronics - just a map, truck and their eyes.
“Imagine that,” DiIulio said. “A little piece of charcoal sitting on a gravel road right there.”
The pair were lucky they found the pieces first, he said. Scientists from Moscow and two men from Tucson were also on the prowl.
DiIulio and Starr wrapped the pieces in a Ziploc bag and took them back to UNT, where they are conducting a radioisotope study today. The study will give clues about other matter in space.
DiIulio said it was important to find the pieces quickly because they start to lose certain characteristics once they hit the earth’s atmosphere.
Alan Rubin, a research geochemist at the University of California, Los Angeles, said the meteorite that landed in Texas is among the most common kinds -- an ordinary chondrite.
He said his lab had been called on to analyzed a piece of the substance -- not from the chunks that DiIulio and Starr found -- and "it's a real meteorite, not a piece of a satellite."
Though meteorites are found all over world, DiIulio considers himself lucky. Mostly what's out there are tiny pieces -- some as small as a grain of sand.
“Every once in a while ... you get this,” he said.
Austin- Fox News Video: http://www.myfoxaustin.com/dpp/news/021909_Meteorite_Pieces_Located_in_West_TX
More on West, Texas Meteorites 19FEB09
Meteorite hunters searching near West find what they believe was part of Sunday's rumble and flash in the sky
Thursday, February 19, 2009
By Ken Sury
Tribune-Herald staff writer
A reporter was talking with a pair of meteorite hunters Wednesday afternoon when one of them suddenly bent down and picked something up off the dirt, less than a foot from the writer’s shoe.
Moritz Karl quickly showed it to his colleague, Michael Farmer, who eyed it quizzically for a split-second before saying, “Is that . . . ?” Then, with realization, “That’s it!”
Pay dirt. A quarter-sized, roundish piece of chondrite meteorite was the Arizona team’s first proof of a meteor that broke apart Sunday over Central Texas and now lies — by the group’s estimate — in thousands of pieces across of a swath of northern McLennan County and probably southern Hill County.
Related
This quarter-sized piece of chondrite, the most common type of meteorite that falls to Earth, was the first found by the team from Arizona. (Rod Aydelotte photo)
Michael Farmer of Tucson, Ariz., holds up a piece of meteorite found Wednesday by Moritz Karl (left) as they searched near West with Robert Ward and Shauna Russell (right). (Rod Aydelotte photo)
“We have lots of dead-end hunts that don’t pay off like this,” said Robert Ward, 32, who has hunted for meteorites for more than 20 years.
The foursome arrived in Waco from Arizona having a pretty good idea that Sunday’s fireball over Central Texas, initially believed to be debris from last week’s collision of a U.S. and Russian satellite in space, would leave meteor rocks strewn across the countryside, said Farmer, 36, senior member of the group and self-described “field adventurer.”
The rumble and flash of the meteor Sunday caused countless Texans to call authorities and prompted the McLennan County Sheriff’s Office to send a helicopter to search the northeastern portion of the county, including roughly where the Arizona group made their find Wednesday.
“This is a significant event,” Farmer said. “This has worldwide interest, and you’re going to have meteor hunters from all over coming here.”
To underscore that point, two rival meteorite hunters, a Russian and an American who lives in Mexico, arrived before the Arizona group looking for the rocks and visiting with residents and property owners.
“The Russians beat us to it,” Farmer said, his comment sounding a bit like the 1960s space race.
Karl, who usually lives in his native Frankfurt, Germany, said his father called him from Germany where video of the fireball, captured by a TV cameraman videotaping the Austin Marathon, was on the news.
“They’re saying it’s satellite debris,” the 26-year-old recalled his father telling him. “ ‘No’, I told him, ‘That was a meteor.’ ”
Shauna Russell, 23, the junior member of the group, said she and her colleagues had a good idea of where to look for the “strewn field” — the area of fallen meteorites — from triangulating the TV video and eyewitnesses who saw the fireball. It also helped to have images from Doppler radar that detected the fireball in the sky around Hubbard, she said.
The chondrite found Wednesday is what meteorite hunters find 90 to 95 percent of the time, Farmer said. He estimates the strewn field to be anywhere from a mile to 2 miles wide and from 5 to 10 miles long, though it could be shorter based on the meteor’s sharp trajectory indicated in the video.
The group said the meteor, which likely hit the atmosphere at about 22,000 mph, could have been anywhere from the size of a refrigerator to a pickup before it began breaking apart. Residents within a few miles of the larger pieces falling would have heard whistling sounds like artillery shell zipping through the air, Ward said.
Farmer said he’s made a living for 13 years hunting and collecting meteorites, which can be sold to universities, planetariums and other collectors. Those sales help fund his and Ward’s meteorite chases, which have taken them to every continent except Antarctica on more than 50 hunts.
“There is an interest. These objects are worth money,” he said.
As word gets out, Farmer expects the area to overrun with professional hunters as well as amateurs, although he said he hopes people can help them find the space rocks, for which they might get paid.
“This is a big deal,” said Farmer, who added that he’s provided many of the meteorites in Texas Christian University’s collection. “It might be 20, 30 years before you get another like this in Texas.”
Thursday, February 19, 2009
By Ken Sury
Tribune-Herald staff writer
A reporter was talking with a pair of meteorite hunters Wednesday afternoon when one of them suddenly bent down and picked something up off the dirt, less than a foot from the writer’s shoe.
Moritz Karl quickly showed it to his colleague, Michael Farmer, who eyed it quizzically for a split-second before saying, “Is that . . . ?” Then, with realization, “That’s it!”
Pay dirt. A quarter-sized, roundish piece of chondrite meteorite was the Arizona team’s first proof of a meteor that broke apart Sunday over Central Texas and now lies — by the group’s estimate — in thousands of pieces across of a swath of northern McLennan County and probably southern Hill County.
Related
This quarter-sized piece of chondrite, the most common type of meteorite that falls to Earth, was the first found by the team from Arizona. (Rod Aydelotte photo)
Michael Farmer of Tucson, Ariz., holds up a piece of meteorite found Wednesday by Moritz Karl (left) as they searched near West with Robert Ward and Shauna Russell (right). (Rod Aydelotte photo)
“We have lots of dead-end hunts that don’t pay off like this,” said Robert Ward, 32, who has hunted for meteorites for more than 20 years.
The foursome arrived in Waco from Arizona having a pretty good idea that Sunday’s fireball over Central Texas, initially believed to be debris from last week’s collision of a U.S. and Russian satellite in space, would leave meteor rocks strewn across the countryside, said Farmer, 36, senior member of the group and self-described “field adventurer.”
The rumble and flash of the meteor Sunday caused countless Texans to call authorities and prompted the McLennan County Sheriff’s Office to send a helicopter to search the northeastern portion of the county, including roughly where the Arizona group made their find Wednesday.
“This is a significant event,” Farmer said. “This has worldwide interest, and you’re going to have meteor hunters from all over coming here.”
To underscore that point, two rival meteorite hunters, a Russian and an American who lives in Mexico, arrived before the Arizona group looking for the rocks and visiting with residents and property owners.
“The Russians beat us to it,” Farmer said, his comment sounding a bit like the 1960s space race.
Karl, who usually lives in his native Frankfurt, Germany, said his father called him from Germany where video of the fireball, captured by a TV cameraman videotaping the Austin Marathon, was on the news.
“They’re saying it’s satellite debris,” the 26-year-old recalled his father telling him. “ ‘No’, I told him, ‘That was a meteor.’ ”
Shauna Russell, 23, the junior member of the group, said she and her colleagues had a good idea of where to look for the “strewn field” — the area of fallen meteorites — from triangulating the TV video and eyewitnesses who saw the fireball. It also helped to have images from Doppler radar that detected the fireball in the sky around Hubbard, she said.
The chondrite found Wednesday is what meteorite hunters find 90 to 95 percent of the time, Farmer said. He estimates the strewn field to be anywhere from a mile to 2 miles wide and from 5 to 10 miles long, though it could be shorter based on the meteor’s sharp trajectory indicated in the video.
The group said the meteor, which likely hit the atmosphere at about 22,000 mph, could have been anywhere from the size of a refrigerator to a pickup before it began breaking apart. Residents within a few miles of the larger pieces falling would have heard whistling sounds like artillery shell zipping through the air, Ward said.
Farmer said he’s made a living for 13 years hunting and collecting meteorites, which can be sold to universities, planetariums and other collectors. Those sales help fund his and Ward’s meteorite chases, which have taken them to every continent except Antarctica on more than 50 hunts.
“There is an interest. These objects are worth money,” he said.
As word gets out, Farmer expects the area to overrun with professional hunters as well as amateurs, although he said he hopes people can help them find the space rocks, for which they might get paid.
“This is a big deal,” said Farmer, who added that he’s provided many of the meteorites in Texas Christian University’s collection. “It might be 20, 30 years before you get another like this in Texas.”
19 February 2009
Mike Farmer Finds Texas Meteorite 19FEB09
I just heard that two University of North Texas (in Denton) researchers recovered two meteorites near West Texas where the fireball would have landed. Hopefully we can get more details on exactly where and what types they are. Source: Pat Branch, TX
A link to the story...
http://www.wfaa.com/sharedcontent/dws/wfaa/latestnews/stories/wfaa090218_mo_debris.2cb7ecf4.html
--- In http://us.mc532.mail.yahoo.com/mc/compose?to=meteorobs@yahoogroups.com,
Pat Branch wrote: "I just heard that two University of North Texas (in Denton)> researchers recovered two meteorites near West Texas where the fireball would have landed. Hopefully we can get more details on exactly where and what types they are."
Mike Farmer reports that he has also found stones from the fall!!!!
Looks like Mike Farmer (well-known Tucson hunter) found a piece too.
Here are pics and a video of them hunting.
http://www.wacotrib.com/blogs/content/shared-gen/blogs/communities/breakingnews/entries/2009/02/18/meteorite_hunters_searching_ne.html#postcomment
A link to the story...
http://www.wfaa.com/sharedcontent/dws/wfaa/latestnews/stories/wfaa090218_mo_debris.2cb7ecf4.html
--- In http://us.mc532.mail.yahoo.com/mc/compose?to=meteorobs@yahoogroups.com,
Pat Branch wrote: "I just heard that two University of North Texas (in Denton)> researchers recovered two meteorites near West Texas where the fireball would have landed. Hopefully we can get more details on exactly where and what types they are."
Mike Farmer reports that he has also found stones from the fall!!!!
Looks like Mike Farmer (well-known Tucson hunter) found a piece too.
Here are pics and a video of them hunting.
http://www.wacotrib.com/blogs/content/shared-gen/blogs/communities/breakingnews/entries/2009/02/18/meteorite_hunters_searching_ne.html#postcomment
UNT astronomers say they found 2 samples of meteorites near WEST, TX 18FEB09
UNT astronomers say they found 2 samples of meteor
By REGINA L. BURNS Associated Press Writer © 2009 The Associated Press
Feb. 18, 2009, 10:52PM
houston_chron196:http://www.chron.com/disp/story.mpl/buzz/6270243.html
DALLAS — Two samples of fresh material the "size of large pecans" from a meteor that alarmed numerous residents when it streaked across the Texas sky on Sunday have been found by two University of North Texas astronomers in a pasture east of the small town of West.
"The pieces that we found have beautiful ablation crust. And it's black like charcoal. Underneath this crust the color of the rock is concrete like gray," said Ron DiLulio, director of the planetarium and astronomy lab program at the University of North Texas in Denton.
DiLulio and Preston Starr, UNT's observatory manager, said they found the pieces Wednesday about 5 p.m. after starting their search from Fort Worth at 3 a.m. using calculations from all of the calls they had received.
DiLulio said they had just about given up looking and were driving back when a friend called and asked to meet them at a certain intersection. They said that coincided with conversations they had had earlier that day with citizens at a restaurant.
"We decided rather than try to get permission from landowners, there would be pieces in a line that would spread out a mile across. We decided to just do the county roads and we just started walking down that road and it's fairly easy to see. It jumped out at us within 15 minutes," DiLulio said.
"We came back to where our gut instinct told us," Starr said. He said the McLennan County sheriff and deputies confirmed what citizens had told them.
"The sheriff told his deputy to take us out there," DiLulio said.
The astronomers placed the samples in ZipLoc bags to keep out the air. They plan to transfer the samples to membrane cases and take them to the university for additional study.
People on Sunday reported seeing a fireball streak across the sky and DiLulio said the reason it created such a fireball was because the meteor expanded and broke into pieces.
The pair said they were not alone in the search and ran into others including "a commercial meteorite hunter and we wanted to get there so we could have it first for science," DiLulio said.
Starr said the pair had been gathering information since they initially learned of the meteor's appearance.
"We did a lot of pre-planning. We looked at the angles of what they saw in the sky and we were able to map it all out. We put a plan together and we drove around small country roads. Texas has lots of small farm to market roads," Starr said.
DiLulio said he thinks there are larger pieces still to be found.
"We feel that there are probably several hundred pieces. What happens when these things fall — they may break apart. We want to find these early and study the primitive material before our atmosphere affects them," DiLulio said
He said the pair planned on returning to the areas where they had searched.
"Everytime we find one we mark where it is on the map and we can measure how much material actually hit the surface of the earth," DiLulio said.
West is about 70 miles south of Dallas.
____
On the Web:
University of North Texas, http://www.unt.edu/
By REGINA L. BURNS Associated Press Writer © 2009 The Associated Press
Feb. 18, 2009, 10:52PM
houston_chron196:http://www.chron.com/disp/story.mpl/buzz/6270243.html
DALLAS — Two samples of fresh material the "size of large pecans" from a meteor that alarmed numerous residents when it streaked across the Texas sky on Sunday have been found by two University of North Texas astronomers in a pasture east of the small town of West.
"The pieces that we found have beautiful ablation crust. And it's black like charcoal. Underneath this crust the color of the rock is concrete like gray," said Ron DiLulio, director of the planetarium and astronomy lab program at the University of North Texas in Denton.
DiLulio and Preston Starr, UNT's observatory manager, said they found the pieces Wednesday about 5 p.m. after starting their search from Fort Worth at 3 a.m. using calculations from all of the calls they had received.
DiLulio said they had just about given up looking and were driving back when a friend called and asked to meet them at a certain intersection. They said that coincided with conversations they had had earlier that day with citizens at a restaurant.
"We decided rather than try to get permission from landowners, there would be pieces in a line that would spread out a mile across. We decided to just do the county roads and we just started walking down that road and it's fairly easy to see. It jumped out at us within 15 minutes," DiLulio said.
"We came back to where our gut instinct told us," Starr said. He said the McLennan County sheriff and deputies confirmed what citizens had told them.
"The sheriff told his deputy to take us out there," DiLulio said.
The astronomers placed the samples in ZipLoc bags to keep out the air. They plan to transfer the samples to membrane cases and take them to the university for additional study.
People on Sunday reported seeing a fireball streak across the sky and DiLulio said the reason it created such a fireball was because the meteor expanded and broke into pieces.
The pair said they were not alone in the search and ran into others including "a commercial meteorite hunter and we wanted to get there so we could have it first for science," DiLulio said.
Starr said the pair had been gathering information since they initially learned of the meteor's appearance.
"We did a lot of pre-planning. We looked at the angles of what they saw in the sky and we were able to map it all out. We put a plan together and we drove around small country roads. Texas has lots of small farm to market roads," Starr said.
DiLulio said he thinks there are larger pieces still to be found.
"We feel that there are probably several hundred pieces. What happens when these things fall — they may break apart. We want to find these early and study the primitive material before our atmosphere affects them," DiLulio said
He said the pair planned on returning to the areas where they had searched.
"Everytime we find one we mark where it is on the map and we can measure how much material actually hit the surface of the earth," DiLulio said.
West is about 70 miles south of Dallas.
____
On the Web:
University of North Texas, http://www.unt.edu/
COMET LULIN & SATELLITE DEBRIS UPDATES
Space Weather News for Feb. 18, 2009http://spaceweather.com
COMET LULIN UPDATE: Comet Lulin is approaching Earth and brightening rapidly. Observers say it is now visible to the naked eye as a faint (magnitude +5.6) gassy patch in the constellation Virgo before dawn. Even city dwellers have seen it. Backyard telescopes reveal a vivid green comet in obvious motion. Just yesterday, amateur astronomers watched as a solar wind gust tore away part of the comet's tail, the second time this month such a thing has happened. Lulin's closest approach to Earth (38 million miles) is on Feb. 24th; at that time the comet could be two or three times brighter than it is now.
Browse the gallery for the latest images: http://spaceweather.com/comets/gallery_lulin_page8.htm
SATELLITE DEBRIS: More than a week has passed since the Feb. 10th collision of Iridium 33 and Kosmos 2251 over northern Siberia, and the orbits of some of the largest fragments have now been measured by US Strategic Command. Today's edition of http://Spaceweather.com features global maps showing where the debris is located. Only 26 fragments are currently plotted, but that number will grow as radar tracking of the debris continues. Check back often for updates.
COMET LULIN UPDATE: Comet Lulin is approaching Earth and brightening rapidly. Observers say it is now visible to the naked eye as a faint (magnitude +5.6) gassy patch in the constellation Virgo before dawn. Even city dwellers have seen it. Backyard telescopes reveal a vivid green comet in obvious motion. Just yesterday, amateur astronomers watched as a solar wind gust tore away part of the comet's tail, the second time this month such a thing has happened. Lulin's closest approach to Earth (38 million miles) is on Feb. 24th; at that time the comet could be two or three times brighter than it is now.
Browse the gallery for the latest images: http://spaceweather.com/comets/gallery_lulin_page8.htm
SATELLITE DEBRIS: More than a week has passed since the Feb. 10th collision of Iridium 33 and Kosmos 2251 over northern Siberia, and the orbits of some of the largest fragments have now been measured by US Strategic Command. Today's edition of http://Spaceweather.com features global maps showing where the debris is located. Only 26 fragments are currently plotted, but that number will grow as radar tracking of the debris continues. Check back often for updates.
17 February 2009
Closing in on the Texas Meteorite Strewnfield??? 18FEB09
"Alright I agree that the Austin, Waco, Dallas event was one event and was not satellite debris." ...
The radar tracks you referenced are great Ed. They show any meteorites would have landed about 5 kilometers SE of Lake Whitney. Although the altitude differences cause a large spread over the possible impact zone. The Fort Worth Radar (which I can see from my house) would have imaged the one on the right first and the one on the left second. The Granger radar would have imaged the lower altitude first and the higher altitude second, so yes it would have been a reflection off an Ionization trail. The images would have been about a second and 6 degs of scan apart. My belief they were separate parts of something come from early reports from McKinney saying it was seen in the north. In the police dash cam from plano it appears to be going north to south in a more vertical direction and very high in the sky. Reports from Denton also put it very high in the sky (still confused about how this could be). The Austin video was suppose to be taken looking north giving a fall area around Marble Falls. So it must have been taken NE or ENE to give the low trajectory and east to west appearance. There is no way an object 9,000 feet off the ground can be seen from 120 miles away, so it must have been over Hearn area from the Austin video. It would be interesting to hear more reports from the Whitney, West, Mart area to try and determine if there are any possible meteorites from this one.
Not likely to start any search parties like the Canadian bolide did though....
Source: Pat Branch, TX, USA
The radar tracks you referenced are great Ed. They show any meteorites would have landed about 5 kilometers SE of Lake Whitney. Although the altitude differences cause a large spread over the possible impact zone. The Fort Worth Radar (which I can see from my house) would have imaged the one on the right first and the one on the left second. The Granger radar would have imaged the lower altitude first and the higher altitude second, so yes it would have been a reflection off an Ionization trail. The images would have been about a second and 6 degs of scan apart. My belief they were separate parts of something come from early reports from McKinney saying it was seen in the north. In the police dash cam from plano it appears to be going north to south in a more vertical direction and very high in the sky. Reports from Denton also put it very high in the sky (still confused about how this could be). The Austin video was suppose to be taken looking north giving a fall area around Marble Falls. So it must have been taken NE or ENE to give the low trajectory and east to west appearance. There is no way an object 9,000 feet off the ground can be seen from 120 miles away, so it must have been over Hearn area from the Austin video. It would be interesting to hear more reports from the Whitney, West, Mart area to try and determine if there are any possible meteorites from this one.
Not likely to start any search parties like the Canadian bolide did though....
Source: Pat Branch, TX, USA
Recent Impact Papers Available 16FEB09
Below are some recent papers about impact structures and alleged impactites that have appeared.
1. Schmieder, M., E. Buchner, and D. P. LeHeron, 2009, The Jebel Hadid structure (Al Kufrah Basin ,SE Libya)—A possible impact structure and potential hydrocarbon trap? Marine and Petroleum Geology. vol 26. no. 3, pp. 310-318. doi:10.1016/j.marpetgeo.2008.04.003
http://dx.doi.org/10.1016/j.marpetgeo.2008.04.003
The Jebel Hadid structure is formed in the Nubian Sandstone and located in southern Al Kufrah Basin. It is a 4.7 km circular feature with a set of multiple concentric annular ridges. they suggest "that the Jebel Hadid structure might represent an eroded, complex impact structure' much like the Tin Bider structure in Algeria. Its location is 20º 52' N and 22º 42' E).
2. Ghoneim, E. M., 2008, Ibn-Batutah: A possible simple impact structure in southeastern Libya, a remote sensing study. Geomorphology. vol. 103, no. 3, pp. 341-350. The Ibn-Batutah feature is a circular structure centered on 21° 34′ 10″ N and 20° 50′ 15″ E and located in southeastern Libya. It is formed in Nubian Sandstone.
http://dx.doi.org/10.1016/j.geomorph.2008.07.005http://www.bu.edu/remotesensing/faculty/research/ghoneim/index.html
3. McCall, G. J. H., 2009, Half a century of progress in research on terrestrial impact structures: A review. Earth-Science Reviews.vol 92, no. 3-4, pp. 99-116.
http://dx.doi.org/10.1016/j.earscirev.2008.11.004
4. McCall, G. J. H., in press, The Carbonado diamond conundrum Earth-Science Reviews, In Press, Accepted Manuscript, Available online 13 February 2009. doi:10.1016/j.earscirev.2009.01.002
http://dx.doi.org/10.1016/j.earscirev.2009.01.002
"The reviewer presents the results of a literature search on the enigmatic occurrences of carbonado; a form (but not the only form) of polycrystalline diamond, which is mined for industrial diamonds." He hypothesizes that "carbonado does stem from terrestrial eruptive processes" and concludes that much research remainsto be performed before any conclusions can be reached.5. Schmieder, M., and E. Buchner, 2007, Short note: The Fayabasin (N Chad, Africa) – A possible impact structure? Journal of African Earth Sciences. vol. 47, pp. 62–68.The Faya basin is an almost circular structure, centered on 18º 10' N and 19º 34' E. It lies about 55 km ENE of the city of Faya (Largeau) and has a diameter of about 2 km.
"http://dx.doi.org/10.1016/j.jafrearsci.2006.11.004http://adsabs.harvard.edu/abs/2007JAfES..47...62S
Source: Paul V. Heinrich, Baton Rouge, LA, USA
1. Schmieder, M., E. Buchner, and D. P. LeHeron, 2009, The Jebel Hadid structure (Al Kufrah Basin ,SE Libya)—A possible impact structure and potential hydrocarbon trap? Marine and Petroleum Geology. vol 26. no. 3, pp. 310-318. doi:10.1016/j.marpetgeo.2008.04.003
http://dx.doi.org/10.1016/j.marpetgeo.2008.04.003
The Jebel Hadid structure is formed in the Nubian Sandstone and located in southern Al Kufrah Basin. It is a 4.7 km circular feature with a set of multiple concentric annular ridges. they suggest "that the Jebel Hadid structure might represent an eroded, complex impact structure' much like the Tin Bider structure in Algeria. Its location is 20º 52' N and 22º 42' E).
2. Ghoneim, E. M., 2008, Ibn-Batutah: A possible simple impact structure in southeastern Libya, a remote sensing study. Geomorphology. vol. 103, no. 3, pp. 341-350. The Ibn-Batutah feature is a circular structure centered on 21° 34′ 10″ N and 20° 50′ 15″ E and located in southeastern Libya. It is formed in Nubian Sandstone.
http://dx.doi.org/10.1016/j.geomorph.2008.07.005http://www.bu.edu/remotesensing/faculty/research/ghoneim/index.html
3. McCall, G. J. H., 2009, Half a century of progress in research on terrestrial impact structures: A review. Earth-Science Reviews.vol 92, no. 3-4, pp. 99-116.
http://dx.doi.org/10.1016/j.earscirev.2008.11.004
4. McCall, G. J. H., in press, The Carbonado diamond conundrum Earth-Science Reviews, In Press, Accepted Manuscript, Available online 13 February 2009. doi:10.1016/j.earscirev.2009.01.002
http://dx.doi.org/10.1016/j.earscirev.2009.01.002
"The reviewer presents the results of a literature search on the enigmatic occurrences of carbonado; a form (but not the only form) of polycrystalline diamond, which is mined for industrial diamonds." He hypothesizes that "carbonado does stem from terrestrial eruptive processes" and concludes that much research remainsto be performed before any conclusions can be reached.5. Schmieder, M., and E. Buchner, 2007, Short note: The Fayabasin (N Chad, Africa) – A possible impact structure? Journal of African Earth Sciences. vol. 47, pp. 62–68.The Faya basin is an almost circular structure, centered on 18º 10' N and 19º 34' E. It lies about 55 km ENE of the city of Faya (Largeau) and has a diameter of about 2 km.
"http://dx.doi.org/10.1016/j.jafrearsci.2006.11.004http://adsabs.harvard.edu/abs/2007JAfES..47...62S
Source: Paul V. Heinrich, Baton Rouge, LA, USA
Information on Two Recent Meteorites Recovered from Falls 17FEB09
People may be interested in two announcements of recent falls in the Meteoritical Bulletin and associated LPSC abstracts:
Buzzard Coulee, Canada (which everybody knows about):
http://tin.er.usgs.gov/meteor/index.php?code=48654http://www.lpi.usra.edu/meetings/lpsc2009/pdf/1893.pdfhttp://www.lpi.usra.edu/meetings/lpsc2009/pdf/2072.pdf
http://tin.er.usgs.gov/meteor/index.php?code=48653http://www.lpi.usra.edu/meetings/lpsc2009/pdf/1664.pdfhttp://www.lpi.usra.edu/meetings/lpsc2009/pdf/1498.pdf
Source: Dr. Jeffrey N. Grossman
phone: (703) 648-6184
US Geological Survey
fax: (703) 648-6383954
National CenterReston, VA 20192, USA
Buzzard Coulee, Canada (which everybody knows about):
http://tin.er.usgs.gov/meteor/index.php?code=48654http://www.lpi.usra.edu/meetings/lpsc2009/pdf/1893.pdfhttp://www.lpi.usra.edu/meetings/lpsc2009/pdf/2072.pdf
Bunburra Rockhole
31°21.0′S, 129°11.4′E
Nullarbor Region, South Australia, Australia
http://tin.er.usgs.gov/meteor/index.php?code=48653http://www.lpi.usra.edu/meetings/lpsc2009/pdf/1664.pdfhttp://www.lpi.usra.edu/meetings/lpsc2009/pdf/1498.pdf
Source: Dr. Jeffrey N. Grossman
phone: (703) 648-6184
US Geological Survey
fax: (703) 648-6383954
National CenterReston, VA 20192, USA
Italian Fireball makes THREE for 13~15FEB09
Italian Fireball 13FEB09 Photo by: Diego Valeri (c) 2009The evening of Friday 13 two stations of the Italy center have recorded a large fireball of mag -16/-17!!! ( The hour is in UT )
Possible the fall on the Earth of a meteorite. Moreover in the same timetables have been observed others 5/6 fireball to the north and center Italy.
The radiating is in:
AR. = 159.4 degree
Dec. = 22.2 degree
The radiating is in Antihelion (Delta Leonids).
Source: Roberto Haver, Italy
---
Well, in the evening (2009, Febrary 13th, at 20:03:29±1 U.T.), over CentralItaly,a very bright fireball was detected from Rieti.
In the link, posted by Roberto Haver, you have a fireball frame image:
The apparente magnitude was -16.9±2.7 and its time of transit was 6.2±0.1 s.
High probability of impact to ground. We're computing the possible point of intersection with Earth, from video records.
Source and Photo Credits: Diego Valeri
Other recent events were 13Feb09--Kentucky, USA
Austin, Texas 11:20CST 15FEB09
Source and Photo Credits: Diego Valeri
Other recent events were 13Feb09--Kentucky, USA
Austin, Texas 11:20CST 15FEB09
16 February 2009
Fireball Over Texas 15FEB09
Fiery debris seen in Texas skies not from satellite collision, officials say11:20 PM CST on Sunday, February 15, 2009 By RUDOLPH BUSH / The Dallas Morning News
Fiery debris burned through the Texas sky Sunday morning, alarming some and enchanting others but resulting in no apparent injury or damage. Video from Dallas to Austin and beyond, sightings were reported of a red and orange fireball with a small black center speeding toward Earth before burning out in a trail of lingering white smoke. Roland Herwig, spokesman for the Federal Aviation Administration’s southwest division, said the fireball was probably superheated debris from a broken satellite falling to Earth.The FAA could not directly link the debris to the reported collision last week of Russian and U.S. communications satellites, however. “It’s yet to be proved it’s those satellites,” Herwig said. However, a spokeswoman for U.S. Strategic Command said the fireball spotted in the Texas skies Sunday was unrelated to the satellite collision. Air Force Major Regina Winchester said that Joint Space Operations Center at California’s Vandenberg Air Force Base has been monitoring the debris from the collision, and that could not have caused the dramatic sight. She also said the fireball was not related to the estimated 18,000 man-made objects that the center also monitors. “There was no predicted re-entry,” Winchester said about the objects in Earth’s orbit.She said it could possibly have been a natural phenomenon such as a meteorite. It’s unclear exactly how many pieces of debris tumbled toward Texas or whether any more are on the way.The potential danger from debris did prompt the FAA to warn pilots nationwide to be aware of the hazard and to immediately report any sightings. State emergency management officials and local law enforcement agencies also were on alert across much of Texas. Based on reports of a fireball near Waco, local law enforcement officers searched for debris but found nothing, a Texas Department of Public Safety spokeswoman said. Though no one could pinpoint where the debris fell or if it even remained intact through the burnout, the fireball left an impression on those who saw it. They say it burned anywhere from a few seconds to nearly a minute. And in some areas, particularly in East Texas, there were reports of a sonic boom. While it may not be clear for some time what fell from the sky, it seemed to be a singular event.Most sightings in Texas were reported about 11 a.m. Some people thought it was a meteor. Others thought perhaps it was a plane crashing. Doug Schmidt of Richardson was driving south on Central Expressway near the Bush Turnpike when he saw a flash of light in the sky. “It was like a ball of flame with a tail. It looked like a meteor,” he said. “There was flame and then a flash and smoke trailing it. I said ‘Wow, look at that.’ ”Farther south, in Ovilla, Chris Weaver said he stepped outside and just by chance looked south. That’s when he saw a flash of orange moving fast in the sky before burning into a streak of white smoke. “If you were looking up at the southern sky, you couldn’t miss it,” he said. There have been scattered reports across the country of debris falling to Earth since the Russian and U.S. satellites collided Tuesday about 500 miles above Earth. The collision occurred over Siberia and sheared thousands of shards of debris through Earth’s orbit.Pieces of that debris will continue to float through orbit for thousands of years or more, while other pieces will at times fall to Earth, probably likely burning up as they pass through the atmosphere, experts say.
Staff writer Jeff Mosier and The Associated Press contributed to this report.
SOURCE: http://www.quickdfw.com/sharedcontent/dws/news/localnews/stories/021609dnmetdebris.1c083e1f.html
---
Update 16FEB09:
Limestone County sheriff's office reported contact from someone who claimed to have a picture of the fireball and a smoke trail and a Plano,Texas, police cruiser may have capture images from a dashboard camera.
http://www.spaceflightnow.com/news/n0902/15debris/
---
Date: Monday, February 16, 2009, 6:44 PM
What must be sonic booms were reported in Hill and Navarro counties, south of Dallas, Texas. Two towns named in one TV story (a Fox station in the Dallas, Texas, area) where sonic booms were heard were Hubbard and Penelope.
One private report I've seen mentions what I guess was a smoke trail that lasted about ten minutes. That report said the fireball was visible for about eight seconds and that it was going south to north when seen to the east of Austin. Another report from people who apparently were in a car says they saw going NNE while they were traveling northeast.
This was a significant fireball, and I hope another video was made from somewhere. I saw a mention that a police-car dashboard camera may have captured it. This was at 11:00 AM local time -- broad daylight. By the way, online reports now cite the FAA and STRATCOM as saying it was a nature event completely unrelated to the collision of the satellites. I would tend to thank that this might have been detected by a DSP satellite, but if so we might never hear about it.
Source: Ed Cannon - Austin, Texas, USA
---
Other Report:
Astronomer Bill Cooke of NASA's Meteoroid Environment Office is stating that this event was asteroid of about 1 meter, 20 Km/s.
Source: Space weather.
---
UPDATE 17FEB09
Two local TV weather blogs have radar images from 11:03 AM (local, 17:03 UTC) Sunday that show two echoes, one in southern Hill County near Hubbard and another, larger one in the northern corner of McLennan County (Waco), just north of the small town of West and south of the small town of Abbott in Hill County.
They both agree that in one pair of images from Fort Worth radar the right-hand or eastern echo is higher in the atmosphere than the larger one to its left. They say that the one of the left was at about 4,000 feet and the one one the right at about 7,000 feet above the ground. I assume these are echoes of a smoke or debris trail, but maybe they could be plasma (?).
I don't know why there are two separate echoes. I believe that weather radars rotate once per minute. In the KVUE-24 blog, there are two pairs of images, each from a different radar center, and the altitudes of the echoes are given different altitudes for the Granger radar than for the radar from Fort Worth.
However, in this one it appears that the blogger or his source has mis-stated (reversed) the altitudes of the echoes in the second pair of images (from Granger radar).
Here are links:"Sunday Fireball Seen on Radar" (KXAN-36, NBC affiliate, Jim Spencer)http://blogs.kxan.com/weather/2009/02/16/sunday-fireball-seen-on-radar/
"Meteor Captured on Radar" (KVUE-24, ABCaffiliate, Mark Murray)http://www.beloblog.com/KVUE_Blogs/weatherblog/
Now, here is a second-hand report from an eyewitness in Hearne, Robertson County, Texas, who reports that the fireball went near the zenith, lasted about 10 seconds, and lit up the ground in broad daylight: http://www.satobs.org/seesat/Feb-2009/0354.html
From Hearne to West in McLennan County yields a more or less SSE to NNW track, and the two radar echoes seem to have it descending as it went in that direction. I've read one report in which the eyewitness says she saw five streaks. Another story on one of those websites says that so many 911 calls were received in Williamson County (immediately north of Austin) that they sent out a helicopter to search for a fallen aircraft. It would be very nice, if this was detected by DSP satellite, if they would report it as has been done in the past (several years ago).
Ed Cannon - Austin, Texas, USA
15 February 2009
Kentucky Fireball 13FEB09
KENTUCKY FIREBALL: On Friday, Feb. 13th, around 10:00 pm EST, people in central Kentucky heard loud booms, felt their houses shake, and some saw a fireball streaking through the sky. The nature of this event is still under investigation. Possibilities include a small asteroid or a piece of space junk entering Earth's atmosphere. National Weather Service reports that the fireball was debris from the Feb. 10th collision of Iridium 33 and Kosmos 2251 satellites may be premature. Stay tuned for updates.
http://www.spaceweather.com/
A colleague just called reporting a possible fireball over Erlangen, Kentucky at 10:04PM Eastern Daylight tonight 13 Feb 2009. She was not the direct observer but relaying details from a relative who made the observationA greenish-white fireball approximately 2/3rd the diameter of the full moon was observed through a south southeastern facing window falling near vertically. No Magnitude estimate other than "it lit up the room" and "moving very fast". Elton
[meteorite-list] Fireball Alert: North Central Kentucky
UPDATE:
I've spent several hours going over internet forums, scanner reports, etc. and the preponderance of sonic boom reports are coming from London, KY. Some reports from Richmond, KY to the North of London.
Visual Observers have been mentioned from Southern Ohio, Central Kentucky, Middle Tennessee, and Western South Carolina. Those with detail seem to confirm this was a steeply vertical track. Based on what I have gleaned, and trying to be conservative, nothing thus far precludes that this could have been a meteorite dropping fireball. When/if we get satellite observation data please give me a heads up.
London is on Interstate 75 near the Tennessee state line North of Jelico, TN west of Middlesboro, KY. South of Lexington KY. I am about 100 miles away in Knoxville. I'm putting together a resource pack to take to the London Corbin area Tuesday. If anyone is headed to the area please let me know so we can coordinate.
Source: Elton Jones, USA
UPDATE 17FEB09
The Kentucky fireball Friday night (9:00 PM Central,10:00 PM Eastern on 13 February; 03:00 UTC Feb 14) was observed from at least four states: Kentucky, Ohio, Tennessee, and West Virginia.
The following blog has some reports and a map of report locations:
http://transientsky.wordpress.com/2009/02/16/feb-13th-kentucky-fireball/
It seems to have been going east to west. One good report from Owensboro, KY, says that from there it appeared at 45 degrees altitude, disappeared at 15 degrees, and (if I understand correctly) was going almost straight down. This observer estimates the magnitude at -6 to -7 -- from west central Kentucky.
The following site has some reports from southeast Tennessee:
http://www.wbir.com/news/local/story.aspx?storyid=78000&catid=2
Source: Ed Cannon - Austin, Texas, USA
http://www.spaceweather.com/
A colleague just called reporting a possible fireball over Erlangen, Kentucky at 10:04PM Eastern Daylight tonight 13 Feb 2009. She was not the direct observer but relaying details from a relative who made the observationA greenish-white fireball approximately 2/3rd the diameter of the full moon was observed through a south southeastern facing window falling near vertically. No Magnitude estimate other than "it lit up the room" and "moving very fast". Elton
[meteorite-list] Fireball Alert: North Central Kentucky
UPDATE:
I've spent several hours going over internet forums, scanner reports, etc. and the preponderance of sonic boom reports are coming from London, KY. Some reports from Richmond, KY to the North of London.
Visual Observers have been mentioned from Southern Ohio, Central Kentucky, Middle Tennessee, and Western South Carolina. Those with detail seem to confirm this was a steeply vertical track. Based on what I have gleaned, and trying to be conservative, nothing thus far precludes that this could have been a meteorite dropping fireball. When/if we get satellite observation data please give me a heads up.
London is on Interstate 75 near the Tennessee state line North of Jelico, TN west of Middlesboro, KY. South of Lexington KY. I am about 100 miles away in Knoxville. I'm putting together a resource pack to take to the London Corbin area Tuesday. If anyone is headed to the area please let me know so we can coordinate.
Source: Elton Jones, USA
UPDATE 17FEB09
The Kentucky fireball Friday night (9:00 PM Central,10:00 PM Eastern on 13 February; 03:00 UTC Feb 14) was observed from at least four states: Kentucky, Ohio, Tennessee, and West Virginia.
The following blog has some reports and a map of report locations:
http://transientsky.wordpress.com/2009/02/16/feb-13th-kentucky-fireball/
It seems to have been going east to west. One good report from Owensboro, KY, says that from there it appeared at 45 degrees altitude, disappeared at 15 degrees, and (if I understand correctly) was going almost straight down. This observer estimates the magnitude at -6 to -7 -- from west central Kentucky.
The following site has some reports from southeast Tennessee:
http://www.wbir.com/news/local/story.aspx?storyid=78000&catid=2
Source: Ed Cannon - Austin, Texas, USA
12 February 2009
Buzzard Coulee, Canada OC H4 Classification Announced 12FEB09
The Buzzard Coulee, Canada meteorite which fell in late 2008 has been classified as an H4 Ordinary Chondrite in a recently released paper:
http://www.lpi.usra.edu/meetings/lpsc2009/pdf/1893.pdf
http://www.lpi.usra.edu/meetings/lpsc2009/pdf/1893.pdf
Iridium Satellite Space Crash May Produce Future Meteors? 11FEB09
Debris Spews Into Space in Collision of Satellites
By WILLIAM J. BROAD
Published: February 11, 2009
For decades, space experts have warned of orbits around the planet growing so crowded that two satellites might one day slam into one another, producing swarms of treacherous debris. It happened Tuesday. And the whirling fragments could pose a threat to the International Space Station, orbiting 215 miles up with three astronauts onboard, though officials said the risk was now small. “This is a first, unfortunately,” Nicholas L. Johnson, chief scientist for orbital debris at the National Aeronautics and Space Administration, said of the collision. It happened some 490 miles above northern Siberia, at around noon Eastern time. Two communications satellites — one Russian, one American — cracked up in silent destruction. In the aftermath, military radars on the ground tracked large amounts of debris going into higher and lower orbits. “Nothing to this extent” has ever happened before, Mr. Johnson said. “We’ve had three other accidental collisions between what we call catalog objects, but theywere all much smaller than this,” the objects always very small and moderate insize.The communication satellites, he added, “are two relatively big objects. ”The American satellite was an Iridium, one of a constellation of 66 space craft. Liz DeCastro, corporate communications director of Iridium Satellite, based in Bethesda, Md., said that the satellite weighed about 1,200 pounds and that itsbody was more than 12 feet long, not including large solar arrays.In a statement, the company said that it had “lost an operational satellite” on Tuesday, apparently after it collided with “a nonoperational” Russian satellite. “Although this event has minimal impact on Iridium’s service,” the statement added, “the company is taking immediate action to address the loss. ” The company’s hand-held phones can be used anywhere around the globe to give users voice and data communications. Mr. Johnson said the Russian satellite was presumably nonfunctional. Officials at the Russian Embassy in Washington could not be reached for comment. Mr. Johnson said the United States military’s tracking radars had yet to determine the number of detectable fragments. “It’s going to take a while,” he said. “It’s very, very difficult to discriminate all those objects when they’re really close together. And so over the next couple of days we’ll have a much better understanding.”At a minimum, Mr. Johnson added, “I think we’re talking many, many dozens, if not hundreds.” The debris could threaten the space station and its astronaut crew, he said. “There are actually debris from this event which we believe are going through space station altitude already,” he said. The risk to the station, Mr. Johnson added, “is going to be very, very small.” In the worst case, he said, “We’ll just dodge them if we have to. It’s the small things you can’t see that are the ones that can do you harm. ”In Houston, International Space Station controllers have often adjusted its orbit to get out of the way of speeding space debris, which can move so incredibly fast that even small pieces pack a destructive wallop. John Yembrick, a NASA spokesman in Washington, said the agency now judged therisk of collision with the speeding fragments to be “very small.” The threat, headded, is defined and acceptable. Mr. Johnson, who works at the Johnson Space Center in Houston, said the new swarms of whirling debris might also eventually pose a threat to other satellites in an orbital chain reaction. “What we’re doing now is trying to quantify that risk,” he said. “That’s a workin progress. It’s only been 24 hours. We put first things first,” meaning the station and preparing for the next shuttle mission.
William Harwood contributed reporting
11 February 2009
Bolides and Meteorite Falls Conference- Announced for May 10-15, 2009 Prague, Czech
Invitation to the Bolides and Meteorite Falls Conference
held in Prague, Czech, May 10-15, 2009 http://www.bolides09.com/
Dear All,
We would like to take this advantage and to invite you to wonderful spring Prague to meet other colleagues, to share your experiences and to celebrate with us the 50th anniversary of the Pribram meteorite fall.
The Pribram meteorite fall on April 7, 1959 was the first scientifically observed meteorite fall. The associated bolide was captured by the photographic cameras of the double-station meteor observation program initiated and led by the Czech astronomer, Zdenek Ceplecha, who also analyzed all the available data and predicted the location of the meteorites.
To date there have been only 9 cases where a meteorite dropping bolide was observed instrumentally, so that the trajectory and orbit could be determined precisely and – at the same time – the meteorite was recovered.
Nevertheless, thanks to various observational programs and modeling efforts, our understanding of bolides and associated phenomena has increased dramatically over the past 50 years.
We believe, that the conference will be devoted not only to celebrating the anniversary, but also to offer a forum to discuss recent achievements in this field and future programs.
We are looking forward to meeting you in Prague!
On behalf of the Organizing Committee,
Pavel Spurny--Astronomical Institute of the Academy of Sciences of the Czech Republic
Jiri Borovicka--Astronomical Institute of the Academy of Sciences of the Czech Republic
Committee & Contacts
General Information
Conference Schedule
Scientific Topics
Accommodation
Program
Social program
On-line abstract submission
On-line registration
On-line accommodation
Links
Important dates
held in Prague, Czech, May 10-15, 2009 http://www.bolides09.com/
Dear All,
We would like to take this advantage and to invite you to wonderful spring Prague to meet other colleagues, to share your experiences and to celebrate with us the 50th anniversary of the Pribram meteorite fall.
The Pribram meteorite fall on April 7, 1959 was the first scientifically observed meteorite fall. The associated bolide was captured by the photographic cameras of the double-station meteor observation program initiated and led by the Czech astronomer, Zdenek Ceplecha, who also analyzed all the available data and predicted the location of the meteorites.
To date there have been only 9 cases where a meteorite dropping bolide was observed instrumentally, so that the trajectory and orbit could be determined precisely and – at the same time – the meteorite was recovered.
Nevertheless, thanks to various observational programs and modeling efforts, our understanding of bolides and associated phenomena has increased dramatically over the past 50 years.
We believe, that the conference will be devoted not only to celebrating the anniversary, but also to offer a forum to discuss recent achievements in this field and future programs.
We are looking forward to meeting you in Prague!
On behalf of the Organizing Committee,
Pavel Spurny--Astronomical Institute of the Academy of Sciences of the Czech Republic
Jiri Borovicka--Astronomical Institute of the Academy of Sciences of the Czech Republic
Committee & Contacts
General Information
Conference Schedule
Scientific Topics
Accommodation
Program
Social program
On-line abstract submission
On-line registration
On-line accommodation
Links
Important dates
Buzzard Coulee, CANADA update 10FEB09
Security cameras caught asteroid fireball
By Rod Nickel, Saskatchewan News Network February 10, 2009
"Security camera footage from a gas station and motel has proven the best tool for researchers to learn the origins of a 15-tonne asteroid that lit up the Prairie sky on Nov. 20. As the asteroid broke apart, it became a giant fireball visible from northern Alberta to Manitoba. Searchers have found pieces in an area southeast of Lloydminster, specifically on a slough called Buzzard Coulee.".... Whole Story at:
http://www.leaderpost.com/Technology/Security+cameras+caught+asteroid+fireball/1271726/story.html
Related Story with camera photo of the fireball:
http://www.canada.com/Technology/Security+camera+footage+understanding+meteorite+origins/1270948/story.html
By Rod Nickel, Saskatchewan News Network February 10, 2009
"Security camera footage from a gas station and motel has proven the best tool for researchers to learn the origins of a 15-tonne asteroid that lit up the Prairie sky on Nov. 20. As the asteroid broke apart, it became a giant fireball visible from northern Alberta to Manitoba. Searchers have found pieces in an area southeast of Lloydminster, specifically on a slough called Buzzard Coulee.".... Whole Story at:
http://www.leaderpost.com/Technology/Security+cameras+caught+asteroid+fireball/1271726/story.html
Related Story with camera photo of the fireball:
http://www.canada.com/Technology/Security+camera+footage+understanding+meteorite+origins/1270948/story.html
09 February 2009
COMET LULIN UPDATE 8JAN09
COMET LULIN UPDATE 8JAN09
COMET LULIN UPDATE: The plasma tail of Comet Lulin, torn off by a solar wind gust on Feb. 4th, has already grown back. Also, observers in dark-sky locations report that the comet is now visible to the naked eye as a pale "fuzzy patch" in the constellation Libra before dawn. The comet is brightening as it approaches Earth for a 38-million-mile close encounter on Feb. 24th. See the latest images in the Comet Lulin Photo Gallery: http://spaceweather.com/comets/gallery_lulin_page7.htm
Space Weather News for Feb. 8, 2009
http://spaceweather.com
COMET LULIN UPDATE: The plasma tail of Comet Lulin, torn off by a solar wind gust on Feb. 4th, has already grown back. Also, observers in dark-sky locations report that the comet is now visible to the naked eye as a pale "fuzzy patch" in the constellation Libra before dawn. The comet is brightening as it approaches Earth for a 38-million-mile close encounter on Feb. 24th. See the latest images in the Comet Lulin Photo Gallery: http://spaceweather.com/comets/gallery_lulin_page7.htm
Space Weather News for Feb. 8, 2009
http://spaceweather.com
DUSKY LUNAR ECLIPSE: On Monday, 9FEB09
DUSKY LUNAR ECLIPSE:
On Monday, Feb. 9th, the full Moon will pass through the outskirts of Earth's shadow, producing a penumbral lunar eclipse. The event will be visible to the naked eye as a dusky shading of the northern half of the Moon. Maximum eclipse occurs between the hours of 1400 and 1520 UT (6:00 am - 7:20 am PST). The timing favors observers in east Asia, Australia, Hawaii and western parts of North America.
Visit http://spaceweather.com for a visibility map, animations, and more information.
On Monday, Feb. 9th, the full Moon will pass through the outskirts of Earth's shadow, producing a penumbral lunar eclipse. The event will be visible to the naked eye as a dusky shading of the northern half of the Moon. Maximum eclipse occurs between the hours of 1400 and 1520 UT (6:00 am - 7:20 am PST). The timing favors observers in east Asia, Australia, Hawaii and western parts of North America.
Visit http://spaceweather.com for a visibility map, animations, and more information.
New Scientist" Commentary About Younger Dryas Impact Hypothesis 8JAN09
New Scientist" Commentary About Younger Dryas Impact Hypothesis 8JAN09
Beware Earth-shattering Headlines
04 February 2009 by Jeff Hecht
Magazine issue 2694.
"FEW editors can resist a disaster story, even one that happened in the distant past. So it is little wonder that the press jumped all over claims by a team of 25 researchers in 2007 that a mysterious impact on the North American ice sheet 12,900 years ago wiped out the continent's Pleistocene megafauna and the Clovis culture of the early settlers, and wreaked havoc on the global climate. The researchers claim a comet collision triggered wildfires across the continent and a sudden cooling known as the Younger Dryas event. If correct, the theory could help resolve a long-running debate over whether climate change or the first human settlers killed off the mammoths and other ice-age giants"....for the rest of the story:
http://www.newscientist.com/article/mg20126947.000-beware-earthshattering-headlines.html
Beware Earth-shattering Headlines
04 February 2009 by Jeff Hecht
Magazine issue 2694.
"FEW editors can resist a disaster story, even one that happened in the distant past. So it is little wonder that the press jumped all over claims by a team of 25 researchers in 2007 that a mysterious impact on the North American ice sheet 12,900 years ago wiped out the continent's Pleistocene megafauna and the Clovis culture of the early settlers, and wreaked havoc on the global climate. The researchers claim a comet collision triggered wildfires across the continent and a sudden cooling known as the Younger Dryas event. If correct, the theory could help resolve a long-running debate over whether climate change or the first human settlers killed off the mammoths and other ice-age giants"....for the rest of the story:
http://www.newscientist.com/article/mg20126947.000-beware-earthshattering-headlines.html
Subscribe to:
Posts (Atom)