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Messages 1 - 82 of total 82 in this topic |
McHale's Navy
Trad climber
Panorama City, California & living in Seattle
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Feb 15, 2013 - 01:30am PT
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wow! amazing how bright it got.
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John M
climber
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Feb 15, 2013 - 01:38am PT
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That was a lot of broken windows. Wow..
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YosemiteSteve
Trad climber
CA
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Topic Author's Reply - Feb 15, 2013 - 01:43am PT
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It's crazy, but this thing almost feels like a hoax in some way. All of these shots of broken windows, but we never actually see any glass fall.
I do think it's real, but man, sometimes it's hard to tell these days.
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Big Mike
Trad climber
BC
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Feb 15, 2013 - 02:48am PT
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Thanks YS! Crazy!!
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Fletcher
Trad climber
The great state of advaita
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Feb 15, 2013 - 02:58am PT
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Wow, these Russians are so nonchalant! I be screaming at least out of excitement at how cool this was. And problem something a bit more graphic for the ones that appeared to be approaching the area of the vehicles! :-)
Do all Russians drive around recording their daily routes? Or maybe these were police or other official vehicles that are required to record?
Very cool!
Eric
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pell
Trad climber
Sunnyvale
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Feb 15, 2013 - 04:17am PT
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Do all Russians drive around recording their daily routes?
Almost all. A wide-angle loop-writing camcoder is really cheap. Sometimes it is the only chance to have a fair trial in Russia.
Here is an example why Russian drivers need camcoders:
[Click to View YouTube Video]
Without camera this driver would get several years sentence (probably it's not bad at all, ref. 0:33 - it is mad to drive so close to pedestrian at that speed).
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Norwegian
Trad climber
Pollock Pines, California
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Feb 15, 2013 - 07:02am PT
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i was half way up a route at sugarloaf,
climbing in the early morning light on
the west-facing aspect of my mountain
when the coloma meteor passed thru
our california sky.
for a second or two, the rock face
brightened as if high noon had arrived
with short notice.
so i turn around to see who's sparking
an arc welder at the bottom of my climb
and i see a bright giant glowing fireball
shooting (not to fast though, more like
a fast jet than a shooting star)
down the 50 corridor.
about 40 seconds later it detonates
and shakes all serenities within
two forevers, including me and
my hand jam in the mountain.
i had no phone or device,
so i was certain that we'd been bombed,
and that san francisco was in deteriorating
shambles. i calmly finished my pitch,
then rapped down, downed a beer,
and jugged my rope toward
the end of the world.
the only foe of the moment
was that my dog high-tailed it
outta there when the explosion occurred,
and it took me two trips back up to
sugarloaf to find her.
sweet sky candy on that one.
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Srbphoto
climber
Kennewick wa
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Feb 15, 2013 - 09:44am PT
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not sure what is scarier the meteorite or the way that driver passed another car as they were passing a school bus.
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can't say
Social climber
Pasadena CA
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Feb 15, 2013 - 10:15am PT
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I wonder what NASA would do if they found out that an end of the world meteorite or other kind of large space debris was going to hit the earth soon?
Do they tell the population?
There's nothing we can do to avoid it so why have a "Lord of the Flies" party?
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10b4me
Boulder climber
Somewhere on 395
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Feb 15, 2013 - 11:13am PT
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It's time for a new ice age
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justthemaid
climber
Jim Henson's Basement
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Feb 15, 2013 - 11:20am PT
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Wow- amazing video. That's not a hoax
The largest meteorite impact in recorded history actually hit Russia back in 1908 http://en.wikipedia.org/wiki/Tunguska_event
The Tungusta Event: from Wiki (edited excerpt)
"The Tunguska event was an enormously powerful explosion that occurred near the Podkamennaya Tunguska River on June 30 1908... Different studies have yielded widely varying estimates of the object's size, on the order of 100 metres. It is the largest impact event on or near Earth in recorded history...
Although the meteoroid or comet appears to have burst in the air rather than hitting the surface, this event still is referred to as an impact. Estimates of the energy of the blast range from 5 to as high as 30 megatons of TNT with 10–15 megatons of TNT the most likely—roughly equal to the United States' Castle Bravo thermonuclear bomb tested on March 1, 1954; about 1,000 times more powerful than the atomic bomb dropped on Hiroshima, Japan...
The Tunguska explosion knocked an estimated 80 million trees down over an area covering 2,150 square kilometres (830 sq mi). It is estimated that the shock wave from the blast would have measured 5.0 on the Richter scale. An explosion of this magnitude is capable of destroying a large metropolitan area..."
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Reilly
Mountain climber
The Other Monrovia- CA
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Feb 15, 2013 - 11:24am PT
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I don't get it. In TGT's vid the thing is long gone and then there is the
big explosion, which didn't sound like a sonic boom, and smoke rising from
that building and what sounds like gunfire.
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TGT
Social climber
So Cal
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Feb 15, 2013 - 11:40am PT
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Lots of overpressure and probably hundreds of secondary fires and explosions. The pops could be something as simple as streetlights exploding.
[Click to View YouTube Video]
Note to self;
When there's a big fireball in the sky,
Don't look out the window!
Looks like the local galvanizing plant took a direct hit.
[Click to View YouTube Video]
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Klimmer
Mountain climber
San Diego
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Feb 15, 2013 - 11:49am PT
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Perhaps not as massive and as famous as the Sikhote-Alin ...
But when they triangulate, search, and find, some Russians are going to make some good money when they locate fragments of this witnessed meteorite fall. Good time to look in the winter.
Seems like many witnessed falls have occurred these last few years around the world. Maybe people are just waking-up to the phenom more and we're all carrying cameras in our pockets. The scientific community is greatly benefiting from these "Poor Man Space-probes" that are scientifically priceless, not to mention their monetary worth.
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Reilly
Mountain climber
The Other Monrovia- CA
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Feb 15, 2013 - 11:53am PT
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Klimmer, cool stamp! Pricey stamp - 40 kopecks in 1957 would have been like a day's wages!
Actually, probably only a half day.
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Michelle
Social climber
Toshi's Station, picking up power converters.
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Feb 15, 2013 - 11:57am PT
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Side note. I was living in Twain Harte when the sound of a HUGE explosion woke us up. Apparently, a meteor flew by and landed somewhere outside of Tuolumne City.
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YosemiteSteve
Trad climber
CA
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Topic Author's Reply - Feb 15, 2013 - 12:03pm PT
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Phil Plait aka The Bad Astronomer has some good info here:
http://www.slate.com/blogs/bad_astronomy.html
"I don’t know how big the meteoroid (the solid part) of this was. The information is too scattered; we’d need the position of the people who took the videos to triangulate and see how far up the debris trail is, for example. I’ll note that people were taking video of the trail for some time before the explosion is heard, which is consistent with it being the shock wave from the passage of the meteoroid through our atmosphere high above the ground. I know a lot of folks will think that’s the sound from the explosion due to impact, but it’s more likely to be the sonic boom from something big moving at multiple times the speed of sound through the air."
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TGT
Social climber
So Cal
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Feb 15, 2013 - 12:06pm PT
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This segment gives a bit better timing on the shock waves.
85 sec from the beginning of the vid to the shock wave arrival and the vid has already started for 15- 30 sec or so At +/- 1000 fps the explosion happened at least 20 mi away. Probably at the first visible sign of the vapor trail.
The smaller explosions are shockwaves from the smaller chunks that were trailing the big one impacting thicker air and breaking up.
[Click to View YouTube Video]
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Klimmer
Mountain climber
San Diego
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Feb 15, 2013 - 12:14pm PT
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My question is; would the government or the scientist really tell us the truth if an asteroid was about to hit the earth,
or would they fudge a little to keep the worldwide panic down?
Hey Cosmic,
Someone already knows and has told us already before it even happens ...
My Earth Science students see the excellent NGS DVD: "Asteroids--Deadly Impact" with the late great Dr. Gene Shoemaker, the father of Astrogeology. In the video he is talking about Meteor Crater in Arizona and describing what it would have looked like had we been there, "... you would have seen a mountain coming out of the sky ..." Pretty dramatic description and then they model it in cgi.
At the end of the dvd they say regarding a massive impact to Earth, "it's not a matter of if, but when."
Got that right!
(No, I don't tell my students about the "Secret Forbidden Knowledge" that follows.)
Then there is this description from the Book of Revelation:
Revelation 8:1-10 (KJV)
[1] And when he had opened the seventh seal, there was silence in heaven about the space of half an hour.
[2] And I saw the seven angels which stood before God; and to them were given seven trumpets.
[3] And another angel came and stood at the altar, having a golden censer; and there was given unto him much incense, that he should offer it with the prayers of all saints upon the golden altar which was before the throne.
[4] And the smoke of the incense, which came with the prayers of the saints, ascended up before God out of the angel's hand.
[5] And the angel took the censer, and filled it with fire of the altar, and cast it into the earth: and there were voices, and thunderings, and lightnings, and an earthquake.
[6] And the seven angels which had the seven trumpets prepared themselves to sound.
[7] The first angel sounded, and there followed hail and fire mingled with blood, and they were cast upon the earth: and the third part of trees was burnt up, and all green grass was burnt up.
[8] And the second angel sounded, and as it were a great mountain burning with fire was cast into the sea: and the third part of the sea became blood;
[9] And the third part of the creatures which were in the sea, and had life, died; and the third part of the ships were destroyed.
[10] And the third angel sounded, and there fell a great star from heaven, burning as it were a lamp, and it fell upon the third part of the rivers, and upon the fountains of waters;
[11] And the name of the star is called Wormwood: and the third part of the waters became wormwood; and many men died of the waters, because they were made bitter.
[12] And the fourth angel sounded, and the third part of the sun was smitten, and the third part of the moon, and the third part of the stars; so as the third part of them was darkened, and the day shone not for a third part of it, and the night likewise.
[13] And I beheld, and heard an angel flying through the midst of heaven, saying with a loud voice, Woe, woe, woe, to the inhabiters of the earth by reason of the other voices of the trumpet of the three angels, which are yet to sound!
I can not think of a more accurate description from a vision nearly 2000 years ago of a massive asteroid event slamming into Earth, in Earth's future.
Then we have "Project Wormwood":
http://www.ips.gov.au/IPSHosted/neo/
Ok, everyone have a great day!
:-0
Lol.
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TGT
Social climber
So Cal
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Feb 15, 2013 - 12:23pm PT
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This one was on a perpendicular trajectory to the asteroid.
No relation between the two.
The damage to the Zinc factory was all due to overpressure and an old brick structure. No impact there.
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Klimmer
Mountain climber
San Diego
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Feb 15, 2013 - 12:28pm PT
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Ron,
You sure that's not obsidian with concoidial fracturing?
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Klimmer
Mountain climber
San Diego
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Feb 15, 2013 - 12:37pm PT
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Carefully cut a small slice. Acid etch and see if it has Widmanstatten pattern, then you absolutely know you have an iron meteorite. Widmanstatten pattern takes millions of years of cooling in space to produce. Doesn't occur on Earth.
http://earthandsolarsystem.wordpress.com/2012/12/20/widmanstatten-patterns/
You have to prove its not slag from Earth. Looks like its already been cut??
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climbski2
Mountain climber
Anchorage AK, Reno NV
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Feb 15, 2013 - 12:46pm PT
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NASA statement on Russian meteor:
"According to NASA scientists, the trajectory of the Russian meteorite was significantly different than the trajectory of the asteroid 2012 DA14, making it a completely unrelated object. Information is still being collected about the Russian meteorite and analysis is preliminary at this point. In videos of the meteor, it is seen to pass from left to right in front of the rising sun, which means it was traveling from north to south. Asteroid DA14's trajectory is in the opposite direction, from south to north."
--- That a larger asteroid might be accompanied by smaller debris doesn't seem too unlikely but is not the case here.
And yeah if you see a bright flash I guess you should go to a door if you really feel compelled to look. Learn something new every day.
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Klimmer
Mountain climber
San Diego
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Feb 15, 2013 - 12:56pm PT
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Just got this from Planetary Resources via email ...
Planetary Resources
http://www.planetaryresources.com/
Hi there -
You may have heard of the meteorite that struck the Russian Chelyabinsk region at about 09:15 local time in the region about 1,500 km (930 miles) east of Moscow in the Ural mountains. The damage caused by the shock wave has been extensive. As reports continue to stream in, the number of people injured has been increasingly steadily and nears 1,000, mostly caused by window glass blown out by the shockwave. The amateur videos and pictures illustrate the power that a small object entering the atmosphere at high speed can have.
Estimated at about 10 tons, and about 2 meters across, this object (called a bolide when they are this bright) streaked through the sky at a speed of 54,000 kph (33,000 mph), and due to the extreme forces of atmospheric entry, broke apart between 30-50 km (18-32 miles) above the ground. Despite the coincident timing, the Russian meteorite has nothing to do with 2012 DA14, as the objects have decidedly different trajectories. A fragment from 2012 DA14 would have been moving from south to north, the path of the meteorite is from northeast to southwest. We will certainly learn more about the nature of this object when fragments from it are recovered and studied in laboratories.
In our previous update, we mentioned that many asteroids pass by Earth with little or no warning. We were not exaggerating. Despite considerable progress in asteroid detection, only about one in ten close-approaching asteroids are known about ahead of time. While not every approaching asteroid may be detected, and with little warning not all can be prevented, in this case a little warning would have prevented many injuries, and quelled the panic that followed.
Today's events, both with 2012 DA14 and the Russian meteorite, are a reminder that our Solar System is a crowded place. Today was unnerving indeed, and scary and unfortunate for those near Chelyabinsk. We don’t know when the next one of these might appear, but we’re working to see it coming!
Be sure to watch the many live events going on today as 2012 DA14 safely passes by, and take the opportunity to learn more about these asteroids that are potentially hazardous, but potentially rich reserves of resources for our future prosperity on Earth and in space.
-Chris Lewicki
President & Chief Asteroid Miner
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TwistedCrank
climber
Dingleberry Gulch, Ideeho
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Feb 15, 2013 - 01:07pm PT
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HOLY COW!
Those Ruskies have words for EVERYTHING!
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McHale's Navy
Trad climber
Panorama City, California & living in Seattle
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Feb 15, 2013 - 02:51pm PT
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Falling rocks is my main fear in climbing!
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Reilly
Mountain climber
The Other Monrovia- CA
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Feb 15, 2013 - 02:53pm PT
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Here ya go McHale, who needs asteroids? (and I won't chip in for yer therapy)
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McHale's Navy
Trad climber
Panorama City, California & living in Seattle
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Feb 15, 2013 - 03:24pm PT
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Thanks Reilly!
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apogee
climber
Technically expert, safe belayer, can lead if easy
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Feb 15, 2013 - 03:38pm PT
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"Despite considerable progress in asteroid detection, only about one in ten close-approaching asteroids are known about ahead of time. "
Great. That's just great.
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Big Mike
Trad climber
BC
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Feb 15, 2013 - 03:40pm PT
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i like how the contrail looks twin-engined
Paul at bad astronomy said that indicates the mass split. Hence the two contrails.
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Klimmer
Mountain climber
San Diego
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Feb 15, 2013 - 03:54pm PT
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Alexey
Trad climber
San Jose, CA
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Feb 15, 2013 - 04:20pm PT
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Russian Post Service - Delivered
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Big Mike
Trad climber
BC
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Feb 15, 2013 - 05:18pm PT
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Klimmer that weather report is classic!!
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dave729
Trad climber
Western America
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Feb 15, 2013 - 05:21pm PT
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Until further notice by the government speed of sound is still way less than the speed of light. Takes couple of minutes for meteor sonic boom to travel 50miles down to frozen Russia. Ref lightning flashes and waiting for the boom sort of delay thingie.
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eeyonkee
Trad climber
Golden, CO
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Feb 15, 2013 - 06:19pm PT
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I wonder why Russia and not, say, The Netherlands? Could it be that God hates Russians as much or even more than homosexuals? I turn to Pat Robertson for questions of this nature.
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tooth
Trad climber
B.C.
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Feb 16, 2013 - 02:56am PT
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Army units found three meteorite debris impact sites, two of which are in an area near Chebarkul Lake, west of Chelyabinsk. The third site was found some 80 kilometers further to the northwest, near the town of Zlatoust.
Crazy. I spent a month in these two particular cities. I also spent time in Port-au-Prince just before it was shook up.
Gotta stay home!
Zlatoust is an intersting place. Every day people would be hung somewhere interesting, from the top of the ferris wheel stood out the most to me. They also have a big military weapons factory there that they tried to keep a secret until the late 90's. The whole city had just one lonely highway leading to it - really creepy place overall!
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hb81
climber
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Feb 16, 2013 - 04:46am PT
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Can someone explain the physics of why such an object would "detonate" so violently that windows and solid doors blow out on earth? Why doesn't it just fall apart?
Was the shock wave from entering the atmosphere or from impact?
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tooth
Trad climber
B.C.
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Feb 16, 2013 - 05:01am PT
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The shock wave was more like the wave coming off the bow of a speeding boat. A boat going 30kilometers/second.
As long as there is atmosphere, so once it does enter the atmosphere, there is matter (atmosphere) to displace. The displacement creates a wave that travels at the speed of sound.
Hitting the ground at that speed made a boom too.
So the windows that were broken would be in a shape similar to a lollipop. The handle/stick part is the result of the travel through the air, the candy on the end part the result of coming to a quick stop on the ground.
Once the stone broke up (similar to the space shuttle when it lost it's tiles) the pieces started acting independently and burning up at different rates because they were different sizes.
The object didn't fall and then explode like a bomb. It the friction between it and air got more intense as it got down into thicker air, which meant it burned up mostly before hitting the ground. Notice how all the news reports are of the estimated mass before entering the atmosphere. Most of that burned off before hitting the ground. The energy dispersed during this process in sound was what broke the windows. Kinda like the energy dispersed while you burn a campfire is mostly radiating heat, some light, and very little crackling sound. This was a lot of light, a lot of heat, and a lot of sound!
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hb81
climber
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Feb 16, 2013 - 05:28am PT
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Hey, thanks for the explanation.
From another post:
Estimated at about 10 tons, and about 2 meters across,
So this was just a tiny boulder that did all that damage... imagine something 20 meters across or even larger... pretty scary stuff.
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BASE104
Social climber
An Oil Field
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Feb 16, 2013 - 10:46am PT
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I've read about nuclear weapons design and testing. One of the main things that they measure is the pressure of the shockwave. I was amazed at how low the pressure was to blow a building to shreds. I think that it was less than 10 psia.
When some of us old bastards were kids, the military used to send sonic booms down over the country pretty regularly. A sonic boom can shatter windows, too. That is a ten ton or so jet going 1000mph. This was a ten ton object doing 30km per second.
Somebody else do the math, and I'm sure that that isn't the best answer..but it is close.
The meteroite also had a very shallow trajectory. It didn't come straight down. It was at a shallow angle.
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climbski2
Mountain climber
Anchorage AK, Reno NV
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Feb 16, 2013 - 11:47am PT
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More information has been gathered and this thing was pretty damn big. Not only was energy released from breaking the sound barrier it also exploded. Fortunately it was quite high when it did so or it could have flattened a city. Not just a few roofs, doors and windows. It was about 1/3 the diameter of the one that passed by a few hours later.
NASA http://www.nasa.gov/mission_pages/asteroids/news/asteroid20130215.html
The estimated size of the object, prior to entering Earth's atmosphere, has been revised upward from 49 feet (15 meters) to 55 feet (17 meters), and its estimated mass has increased from 7,000 to 10,000 tons. Also, the estimate for energy released during the event has increased by 30 kilotons to nearly 500 kilotons of energy released.
---
That's the energy of a pretty decent H-Bomb fortunately without the radioactive fallout.
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High Fructose Corn Spirit
Gym climber
-A race of corn eaters
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Feb 16, 2013 - 12:23pm PT
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The data, right now, still seems all over the place. e.g., from 10T to 70,000 T. Quite a range there.
.....
According to the Planetary Society (yeah, I'm a member) ... The Russian meteor was not detected from Earth because it came from the daylight side (i.e. from the sun's direction). Seems like a gap to fill.**
** A 3-6 month blind spot (for earth bound teles). On top of everything else.
.....
A remaining question I have is why did this meteor come in at such a very shallow angle (relative to our atmosphere, almost skipping along it, which is veneer thin)? Coincidence?
We could call it... The Russian Tangent. Or perhaps better, the Chelyabinsk Tangent. :)
QT What per cent drop in on a tangent? Less than 1 per cent? Less than .1 per cent? (Review the most pop Russian video. It's pretty clear I think that this meteor threaded our veneer thin atmosphere in a very tangential angle.)
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Reilly
Mountain climber
The Other Monrovia- CA
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Feb 16, 2013 - 12:36pm PT
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And in answer to my wife's question of why so many meteorites seem to hit
Russia I was like "Duh, it's because they deserve it!"
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Brandon-
climber
The Granite State.
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Feb 16, 2013 - 12:37pm PT
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What's the largest nation, by size, in the world?
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Reilly
Mountain climber
The Other Monrovia- CA
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Feb 16, 2013 - 12:41pm PT
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1.8 times the size of the USA.
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climbski2
Mountain climber
Anchorage AK, Reno NV
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Feb 16, 2013 - 12:42pm PT
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It is normal for initial reports of something like this to be of very mixed accuracy.
It is also normal as time goes on for the experts to dial in much more accurately.
If you want good information about any subject look to the experts. The various space and defence agencies are generally reliable and tend to not only give the best analysis they will usually let you know how certain they are of their information.
Currently what I posted is the best info I could find and the adjustments being made are getting smaller ie accuracy is getting dialed in pretty close now.
-
A little geometry will show that if randomly shooting at spherical object with tiny bullets you are much less likely to get a perpendicular trajectory than a low angled one. Add in the effect of gravity to guide objects that would otherwise miss into glancing blow trajectories and the liklyhood of low angle hits gets even higher.
SO basically if a meteorite is going to hit a nation on earth it is most likely to hit Russia at fairly low angle. Funny enough that's exactly what happened.
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YosemiteSteve
Trad climber
CA
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Topic Author's Reply - Feb 16, 2013 - 12:47pm PT
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A remaining question I have is why did this meteor come in at such a very shallow angle (relative to our atmosphere, almost skipping along it, which is veneer thin)? Coincidence?
I think most these objects get pulled into the Earth, as opposed to falling straight into it, so it's kinda falling out of orbit. Some meteors even skip on the atmosphere, complete another Earth orbit and then finally crash to the ground.
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Brandon-
climber
The Granite State.
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Feb 16, 2013 - 12:47pm PT
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1.8 times the size of the USA.
Mine was a tongue in cheek question.
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Reilly
Mountain climber
The Other Monrovia- CA
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Feb 16, 2013 - 12:49pm PT
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I just figured you wanted the exact number. ;-)
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High Fructose Corn Spirit
Gym climber
-A race of corn eaters
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Feb 16, 2013 - 12:55pm PT
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Yeah, that's interesting. I hope the experts get around to talking about this somewhere. Who's to say this Russian meteor wasn't captured by earth and was for some time in an earth orbit instead of a solar orbit? Then an earth orbit decay would explain the "veneer-approach" entry. Right?
For reference, a geostationary orbit equates to an orbital velocity of about 2 miles / sec. (So this meteor's speed was in the ball park.)
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mcreel
climber
Barcelona
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Feb 16, 2013 - 01:00pm PT
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Hey, Reilly, can we get the story on that rockfall photo?
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climbski2
Mountain climber
Anchorage AK, Reno NV
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Feb 16, 2013 - 01:00pm PT
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I'm sure some folks are gathering the data and trying to backtrack the path of the Russian meteorite. Be interesting if they can get enough accurate info to do the job with a good level of certainty.
now on to the most interesting thing I noticed in the NASA statement.
These new estimates were generated using new data that had been collected by five additional infrasound stations located around the world
Infrasound stations? hmmm time for google.
---- EDIT
Infrasound monitoring stations, Very cool stuff.
http://www.ctbto.org/verification-regime/monitoring-technologies-how-they-work/infrasound-monitoring/
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YosemiteSteve
Trad climber
CA
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Topic Author's Reply - Feb 16, 2013 - 01:02pm PT
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Keep in mind, even though some of these objects run into the Earth, it's usually the Earth running into them...and winning!
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rottingjohnny
Sport climber
mammoth lakes ca
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Feb 16, 2013 - 01:04pm PT
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" Because they deserve it.." More proof why men are smarter than women and why the Pope will never be a woman...
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High Fructose Corn Spirit
Gym climber
-A race of corn eaters
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Feb 16, 2013 - 01:09pm PT
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For perspective, I thought some of you might enjoy this pic of geostationary satellites...
http://en.wikipedia.org/wiki/Geostationary_orbit
.....
eeyonkee,
Speaking of the Gods, what compassion and foresight on their part!! to give the Earth the exact spin and density needed so Their children could one day have geostationary sats at 22k miles to broadcast our social media around the world. Hallelujah! Imagine the opposite: no rotation, then no geostationary ability. Oh the horror! :)
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BASE104
Social climber
An Oil Field
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Feb 16, 2013 - 01:41pm PT
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Most people have never heard of the National Reconnaissance Office. They are the ones who handle launching and operating spy satellites. In this time when the cold war is over, I wonder why we keep spending so much money on this. Their budget is huge, a big chunk of the Defense Budget.
I would be shocked if this was not observed by the flock of spy satellites or ground based radar defense system in Russia.
Like all of this good submarine data, this data will probably not see the light of day. If it had happened over the U.S., the data would never be released. Russia might, though. They are actually far more open than we are on some topics now.
This was very cool, though. Never has one happened right over a big city, and debris analysis will provide a lot of super good data.
A lot of tornado strenght analysis comes from after the fact. I know a guy who is a famous structural engineer and has a company that does this research. He can tell a lot from debris and how it damages structural and construction methods.
I'm happy that the Russian's didn't think that this was a nuke strike. I assume that on radar they saw that it was moving too fast to be a warhead.
I need to catch up on the new info today.
I can show you some really cool subsurface astroblemes. They happen and either erode or get covered with sediment. There are a few famous ones that are preserved at great depth and are visible in petroleum subsurface data.
HFCS..a member of the planetary society? What do you do for a living? I thought that I was a Nerd, but I am not in the top ten on ST.
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BASE104
Social climber
An Oil Field
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Feb 16, 2013 - 01:46pm PT
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Yeah, that's interesting. I hope the experts get around to talking about this somewhere. Who's to say this Russian meteor wasn't captured by earth and was for some time in an earth orbit instead of a solar orbit? Then an earth orbit decay would explain the "veneer-approach" entry. Right?
I'm sure that this data is being crunched at this time, and probably was roughly known within 18 hours of the event.
The asteroid that just missed us is not a further risk. The close approach to Earth has tossed it out into a wild orbit.
I can't wait for the comet that is coming. It might be a big event as it gets close to the sun. It won't be visible for many months like Hale-Bopp was, but it is a sun grazer, and a big one at that.
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Norwegian
Trad climber
Pollock Pines, California
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Feb 16, 2013 - 03:20pm PT
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someone should put a codom
on god, these erratic
money shots splating the good
folks in russia
seems like sloppy reproducineering.
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Anastasia
climber
Home
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Feb 16, 2013 - 05:06pm PT
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I couldn't resist...
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LilaBiene
Trad climber
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Feb 16, 2013 - 05:56pm PT
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This is probably in bad taste, but...
So I just caught the video about the sonic boom, and asked the hubby what the guy exclaimed when he heard it...my husband replied that he didn't know, he wasn't listening. So I repeated what he said (completely missing the subtlety of the exchange), and he looked away, then laughed (like what I thought was, hoo hoo, that's funny, you're trying to imitate something you just heard in Russian) and so I said it again...at which point my husband told me not to say it (blushing, I think) and put his fingers to his lips, nodding towards the muppet.
Oops. Bad mama. Still don't know what he said, but I guess I shouldn't repeat it in polite company...too funny.
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climbski2
Mountain climber
Anchorage AK, Reno NV
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Feb 16, 2013 - 07:59pm PT
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Yeah those are the really bad ones.. but still if this thing had come in at a steeper angle and exploded at a lower altitude it could have leveled that small city instead of the relatively minor damage that did occur.
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TomCochrane
Trad climber
Santa Cruz Mountains and Monterey Bay
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Feb 17, 2013 - 12:53pm PT
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High Fructose Corn Spirit
Gym climber
-A race of corn eaters
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Feb 17, 2013 - 10:43pm PT
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Russian scientists say the meteor weighed about 10 tonnes before it entered the Earth's atmosphere, travelling at some 30km (19 miles) per second, before breaking apart 30-50km (20-30 miles) above ground.
However, the US space agency Nasa said the meteor was 17m (55ft) wide and weighed 10,000 tonnes before entering the atmosphere, releasing about 500 kilotons of energy. The atomic bomb dropped on Hiroshima in 1945 was 12-15 kilotons.
http://www.bbc.co.uk/news/world-europe-21494963
Amazing discrepancy. Just three magnitudes difference.
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YosemiteSteve
Trad climber
CA
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Topic Author's Reply - Feb 19, 2013 - 01:44am PT
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"Here is what we know so far," says Bill Cooke, head of NASA's Meteoroid Environment Office. "The asteroid was about 17 meters in diameter and weighed approximately 10,000 metric tons. It struck Earth's atmosphere at 40,000 mph (18 km/s) and broke apart about 12 to 15 miles (20 to 25 km) above Earth's surface. The energy of the resulting explosion was in the vicinity of 500 kilotons of TNT."
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mouse from merced
Trad climber
The finger of fate, my friends, is fickle.
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Feb 19, 2013 - 11:56am PT
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Klimmer
Mountain climber
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Aug 14, 2013 - 04:07pm PT
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Russian meteor may have gangmates in tow
Orbital estimates pinpoint 20 asteroids on similar
paths to rock that exploded near Chelyabinsk.
By Maggie McKee
Nature
02 August 2013
http://www.nature.com/news/russian-meteor-may-have-gangmates-in-tow-1.13498
They decided to tackle the problem with brute computational force, running simulations of billions of possible orbits to find the ones most likely to have led to a collision. They then used the average of the ten best orbits to search a NASA asteroid catalogue for known objects on similar paths. They found about 20, ranging in size from 5 to 200 metres across, they report in an article to be published in Monthly Notices of the Royal Astronomical Society: Letters1.
......
The best sibling candidate, for instance, is a 200-metre-wide asteroid known as 2011 EO40, whose orbit was calculated from observations taken over just 34 days. That is too short a time to be able to pinpoint its position in the future, says Jon Giorgini, a senior analyst in the Solar System Dynamics Group at NASA's Jet Propulsion Laboratory in Pasadena, California. For that, researchers would need observations taken over the asteroid's two-year orbit, he says.
.........
The only way to prove a connection would be to collect samples from one of the proposed family members and compare them with meteorites collected from the Chelyabinsk region, says Carlos de la Fuente Marcos. However, a cheaper way to find out whether the suspected siblings have at least a passing resemblance could be to measure their composition from their light spectra.
Chelyabinsk meteoroid -----> meteor -----> meteorite, was estimated to be 18.0m in diameter as it entered into Earth's atmosphere before fragmenting above Russia.
This could be a possible uh, oh ...
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