Russian Meteor Strike

Apparently a small chunk of the planetoid flying by Earth has struck a Russian town. Over 400 people injured, no deaths reported yet.

http://edition.cnn.com/2013/02/15/wo...html?hpt=hp_t1

On Friday, February 15, 2013 2:34:59 AM UTC-8, wrote:
Apparently a small chunk of the planetoid flying by Earth has struck a Russian town. Over 400 people injured, no deaths reported yet. http://edition.cnn.com/2013/02/15/wo...html?hpt=hp_t1

More information: the object exploded close to the ground and most of the injuries apparently were caused by broken glass and other debris created by the shock wave from the air burst.

On Feb 15, 6:06*am, " wrote:
On Friday, February 15, 2013 2:34:59 AM UTC-8, wrote:
Apparently a small chunk of the planetoid flying by Earth has struck a Russian town. Over 400 people injured, no deaths reported yet.http://edition.cnn.com/2013/02/15/wo...eteor-shower/i...

More information: the object exploded close to the ground and most of the injuries apparently were caused by broken glass and other debris created by the shock wave from the air burst.

Scientists estimate about 500,000 objects at least the size of
asteroid 2012 DA14 are in the solar system, and astronomers have
discovered less than 1 percent of them.


Makes me wonder how many larger sized objects have fragmented, like
the one that hit saturn? years ago?

There may be clouds of mini asteroids that could impact earth
occasionally

On 15/02/2013 10:34, wrote:

Apparently a small chunk of the planetoid flying by Earth

Nothing whatever to do with 2012 DA14 - totally different orbits.

has struck a Russian town. Over 400 people injured, no deaths reported yet.

http://edition.cnn.com/2013/02/15/wo...html?hpt=hp_t1



--

Brian W Lawrence
Wantage
Oxfordshire

From :
On Friday, February 15, 2013 2:34:59 AM UTC-8, wrote:

Apparently a small chunk of the planetoid flying by Earth has struck a Russian town. Over 400 people injured, no deaths reported yet. http://edition.cnn.com/2013/02/15/wo...html?hpt=hp_t1



More information: the object exploded close to the ground and most of the
injuries apparently were caused by broken glass and other debris created by
the shock wave from the air burst.

It is not just a burst that will cause the shock wave. The simple hypersonic travel will create that wave. It is totally conceivable that a meteor could dip into the atmosphere and pass cleanly out the other side and *still* send hundreds to the hospital for broken glass-type injuries due to its shockwave.

~ CT

From Brian Lawrence:
On 15/02/2013 10:34, wrote:

Apparently a small chunk of the planetoid flying by Earth

Nothing whatever to do with 2012 DA14 - totally different orbits.

After SL9 broke up, all two dozen+ fragments ended up in different orbits. So while there are many who would agree with what you have stated, I myself am not so quick to put a 100% certainty on such a conclusion.

~ CT

I wrote:
From Brian Lawrence:
On 15/02/2013 10:34, wrote:

Apparently a small chunk of the planetoid flying by Earth

Nothing whatever to do with 2012 DA14 - totally different orbits.

I just now read that the this morning's meteor strike came in from a totally different direction from 2012 DA14, so now I see what you were saying.


After SL9 broke up, all two dozen+ fragments ended up in different orbits.
So while there are many who would agree with what you have stated, I myself
am not so quick to put a 100% certainty on such a conclusion.

~ CT

So apparently the SL9 situation does not apply here.

~ CT

On 15/02/2013 17:05, Stuf4 wrote:
I wrote:
From Brian Lawrence:
On 15/02/2013 10:34, wrote:

Apparently a small chunk of the planetoid flying by Earth

Nothing whatever to do with 2012 DA14 - totally different orbits.

I just now read that the this morning's meteor strike came in from a totally
different direction from 2012 DA14, so now I see what you were saying.

It's also about the time difference between the meteor/ite and the
closest approach. Roughly 14 hours apart. Again roughly, the Earth
orbits at around 30kps, so over 14 hours travels about 1.5 million
km ~ 1m miles. That's a huge difference between objects from a single
'parent' - perhaps not 100% impossible, but extremely unlikely.
Possibly if the objects separated a long time ago and their orbits
have continued to diverge over time.

After SL9 broke up, all two dozen+ fragments ended up in different orbits.
So while there are many who would agree with what you have stated, I myself
am not so quick to put a 100% certainty on such a conclusion.

~ CT

So apparently the SL9 situation does not apply here.

~ CT



--

Brian W Lawrence
Wantage
Oxfordshire

On 2/15/2013 5:34 AM, wrote:
Apparently a small chunk of the planetoid flying by Earth has struck a Russian town. Over 400 people injured, no deaths reported yet.

http://edition.cnn.com/2013/02/15/wo...html?hpt=hp_t1


Sounds of the meteor are available via Flash player on this site:

http://www.b.weather.com/news/meteor...earth-20130215

Audio would indicate one severe explosion followed by several smaller
'popping' sounds. First explosion powerful enough not only to break
windows but set off car alarms. Subsequent explosions from remnant
fragments?

It would be nice to have a spectral analysis of the flash.

Dave

On Friday, February 15, 2013 4:42:43 AM UTC-8, bob haller wrote:
Scientists estimate about 500,000 objects at least the size of asteroid 2012 DA14 are in the solar system, and astronomers have discovered less than 1 percent of them. Makes me wonder how many larger sized objects have fragmented, like the one that hit saturn? years ago? There may be clouds of mini asteroids that could impact earth occasionally

"Occasionally", hell- they do EVERY DAY. Bob, meteor 'swarms' such as the Perseids or Leonids are beleived to be exactly that- pieces of comets which have disintegrated. The most likely theory of the Tunguska object is that it was a piece of Comet Encke.

As others have suggested, you're probably thinking of Comet Shoemaker-Levy 9, which impacted Jupiter in 1994.