Author Topic: Meteor Strikes Chelyabinsk, Russia  (Read 136766 times)

Online mlindner

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Re: Meteor Strikes Chelyabinsk, Russia
« Reply #60 on: 02/15/2013 02:32 PM »
No, it shattered. Hitting the lower atmosphere at those speeds is like hitting concrete. They are estimating a mass of about 10 tonnes, about a cubic meter in size.

Big things come in small packages ;)

Right but shattering isn't detonating. It confuses people into thinking the shockwaves are from it exploding. I would say "it disintegrated."
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Online mlindner

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Re: Meteor Strikes Chelyabinsk, Russia
« Reply #61 on: 02/15/2013 02:33 PM »
The meteorite didn't detonate. The explosion sounds are pieces of the meteorite going supersonic/hypersonic velocities with the largest piece having the loudest initial bang.

Edit: Large impact crater!

Another shockwave video:
Your first video is of something completely different... Entirely terrestrial.

If you're saying its volcanic, thats not like any volcanic thing I've seen before.
« Last Edit: 02/15/2013 02:33 PM by mlindner »
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Offline rds100

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Re: Meteor Strikes Chelyabinsk, Russia
« Reply #62 on: 02/15/2013 02:34 PM »

 Large impact crater!


This is not the impact crater, someone is just joking.

edit: Here - http://en.wikipedia.org/wiki/Derweze
« Last Edit: 02/15/2013 02:36 PM by rds100 »

Online mlindner

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Re: Meteor Strikes Chelyabinsk, Russia
« Reply #63 on: 02/15/2013 02:37 PM »

 Large impact crater!


This is not the impact crater, someone is just joking.

edit: Here - http://en.wikipedia.org/wiki/Derweze


Bah darn it. I even saw a russian news station reporting as meteorite impact. Guess it fooled a bunch of people.
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Offline JohnFornaro

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Re: Meteor Strikes Chelyabinsk, Russia
« Reply #64 on: 02/15/2013 02:38 PM »
No, it shattered. Hitting the lower atmosphere at those speeds is like hitting concrete. They are estimating a mass of about 10 tonnes, about a cubic meter in size.

Big things come in small packages ;)

PRI's news release inflated that estimate:

Quote from: Lewicki
Hi there,

As you probably have heard, today, February 15th, a 150-foot (45 meter) asteroid is whizzing by the Earth a hair’s breath from the surface.  Missing us by only 14,000 miles, well within the 22,300 mile orbit of the Geostationary satellites that orbit around the Earth’s equator.  I wanted to put this in perspective for you with some of the chilling and fascinating facts:
This is approximately the same size as the asteroid that hit the Earth in Russia in Siberia (the “Tunguska Event”) on June 30th 1908.

That impact was equivalent to 1,000 Hiroshima nuclear bombs & knocked down 80 million trees down over an area covering 2,150 square kilometers (830 sq mi).

Had it hit near a population center it would have killed millions of people.

Today, there are approximately 610,000 asteroids that are actively tracked in our Solar System.  This number represents less than one percent of the more than 60 million asteroids that orbit the Sun.
 
To learn more about the threat that these asteroids pose and what Planetary Resources, Inc. and the Asteroid Mining industry can do to help protect the Earth, CLICK HERE.
 
-Chris Lewicki
President & Chief Asteroid Miner

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Online mlindner

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Re: Meteor Strikes Chelyabinsk, Russia
« Reply #65 on: 02/15/2013 02:41 PM »
No, it shattered. Hitting the lower atmosphere at those speeds is like hitting concrete. They are estimating a mass of about 10 tonnes, about a cubic meter in size.

Big things come in small packages ;)

PRI's news release inflated that estimate:

Quote from: Lewicki
Hi there,

As you probably have heard, today, February 15th, a 150-foot (45 meter) asteroid is whizzing by the Earth a hair’s breath from the surface.  Missing us by only 14,000 miles, well within the 22,300 mile orbit of the Geostationary satellites that orbit around the Earth’s equator.  I wanted to put this in perspective for you with some of the chilling and fascinating facts:
This is approximately the same size as the asteroid that hit the Earth in Russia in Siberia (the “Tunguska Event”) on June 30th 1908.

That impact was equivalent to 1,000 Hiroshima nuclear bombs & knocked down 80 million trees down over an area covering 2,150 square kilometers (830 sq mi).

Had it hit near a population center it would have killed millions of people.

Today, there are approximately 610,000 asteroids that are actively tracked in our Solar System.  This number represents less than one percent of the more than 60 million asteroids that orbit the Sun.
 
To learn more about the threat that these asteroids pose and what Planetary Resources, Inc. and the Asteroid Mining industry can do to help protect the Earth, CLICK HERE.
 
-Chris Lewicki
President & Chief Asteroid Miner

Good for business.

This is unrelated to the meteorite that just impacted. He was talking about 2012 DA14 that is due to have its closest approach with Earth in a few hours.
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Offline Hauerg

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Re: Meteor Strikes Chelyabinsk, Russia
« Reply #66 on: 02/15/2013 02:44 PM »
No, it shattered. Hitting the lower atmosphere at those speeds is like hitting concrete. They are estimating a mass of about 10 tonnes, about a cubic meter in size.

Big things come in small packages ;)
10t and 1m^3 would be more dense than pure Ni.

Offline Orbiter

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Re: Meteor Strikes Chelyabinsk, Russia
« Reply #67 on: 02/15/2013 02:45 PM »
This came in hauling for sure, 30+ km/s.
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Offline Zed_Noir

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Re: Meteor Strikes Chelyabinsk, Russia
« Reply #68 on: 02/15/2013 02:46 PM »
Here's the location:



How far away is Baikonur from the impact area? My estimate from quick wikipedia lookup is about 600 km. It's roughly where the first K on the Kazakhstan label on Chris B's map. Scary it was that close.

Offline R7

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Re: Meteor Strikes Chelyabinsk, Russia
« Reply #69 on: 02/15/2013 02:50 PM »
The meteorite didn't detonate.

What meteorite would? Are there left-over chunks of C4 from solar system formation up there, yikes  ;)

Is it confirmed that 2012 DA14 is not related to this? What a coincidence if not.
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Offline go4mars

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Re: Meteor Strikes Chelyabinsk, Russia
« Reply #70 on: 02/15/2013 02:54 PM »
The Buzzard Coulee one a couple years ago was about the same size (if this is actually 10 tons).  It just happened in a very sparsely populated area.  I spent days walking the strewn-field in that case with the science team.  If it had happened in a city, I suspect it would have been significant injuries.  Luckily, most of the world is unpopulated.  Unfortunately, a lot of that unpopulated area can expand as waves into populated areas.  Also, unfortunately, the geological record shows that regional impacts may be uncomfortably frequent.  Burckle crater is the biggest recent example I am familiar with.
« Last Edit: 03/06/2013 03:08 PM by go4mars »
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Re: Meteor Strikes Chelyabinsk, Russia
« Reply #71 on: 02/15/2013 02:56 PM »
NASA Media Channel is answering questions. Seems like they're very unorganized right now. Can only hear half of the conversations (can only hear responses no media questions).

They also seem to be forgetting to turn off the audio channel when they blacked out the screen. Someone asked him offscreen "White house wants more information." Jim Garvin: "Tell them to turn on the damn TV."

http://www.ustream.tv/channel/nasa-media-channel
« Last Edit: 02/15/2013 03:28 PM by mlindner »
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Re: Meteor Strikes Chelyabinsk, Russia
« Reply #72 on: 02/15/2013 02:59 PM »
The meteorite didn't detonate.

What meteorite would? Are there left-over chunks of C4 from solar system formation up there, yikes  ;)

Is it confirmed that 2012 DA14 is not related to this? What a coincidence if not.


Bad astronomy blog is pretty certain because of the large time displacement between the two which would put the two rocks on very different orbits.
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Offline mmeijeri

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Re: Meteor Strikes Chelyabinsk, Russia
« Reply #73 on: 02/15/2013 03:01 PM »
Bad astronomy blog is pretty certain because of the large time displacement between the two which would put the two rocks on very different orbits.

It's a pity no one appears to have responded to Jorge's argument for caution.
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Re: Meteor Strikes Chelyabinsk, Russia
« Reply #74 on: 02/15/2013 03:05 PM »
Bad astronomy blog is pretty certain because of the large time displacement between the two which would put the two rocks on very different orbits.

It's a pity no one appears to have responded to Jorge's argument for caution.

http://www.bbc.co.uk/news/world-europe-21468116

Quote
Prof Alan Fitzsimmons, of the Astrophysics Research Centre at Queen's University Belfast, said there was "almost definitely" no connection.

"One reason is that 2012 DA14 is approaching Earth from the south, and this object hit in the northern hemisphere," he told BBC News.
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Offline mmeijeri

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Re: Meteor Strikes Chelyabinsk, Russia
« Reply #75 on: 02/15/2013 03:06 PM »
He is not responding to Jorge's argument.
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Offline Leo E Liptical

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Re: Meteor Strikes Chelyabinsk, Russia
« Reply #76 on: 02/15/2013 03:12 PM »
I stayed at a Holiday Inn Express last night, so I vote for it having something to do with DA14, regardless or the orbital path they say it took. The timing is tooooo close. Remember, people once thought the world was flat, too. Just sayin...
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Offline mr. mark

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Re: Meteor Strikes Chelyabinsk, Russia
« Reply #77 on: 02/15/2013 03:23 PM »
Not to make light of this but, I guess it's time for those asteroid mining companies to use this as possible promo for their asteroid hunting telescopes they're trying to launch.

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Re: Meteor Strikes Chelyabinsk, Russia
« Reply #78 on: 02/15/2013 03:24 PM »
He is not responding to Jorge's argument.

Indeed he is not.  This event is shaping up as a cautionary lesson for everybody.
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Offline mr. mark

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Re: Meteor Strikes Chelyabinsk, Russia
« Reply #79 on: 02/15/2013 03:29 PM »
What are the chances that the asteroid passing close by altered the meteor's trajectory or that the asteroid is a loose configuration with possible out front or trailing debris.

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