290 replies to this topic

[IamLegend]

27vet, on 15 February 2013 - 08:24 PM, said:

I wish all the people injured a speedy recovery. Does Russia attract more ET objects than the rest of the world?

It is the worlds largest country.

[shrooma]

27vet, on 15 February 2013 - 08:24 PM, said:

I wish all the people injured a speedy recovery. Does Russia attract more ET objects than the rest of the world?

due to it's size, russia has a bigger chance, percentage-wise, of being hit. the urals alone have been hit four times in the last hundred years!
but with the earth being mostly covered in water, who knows how many hits go unnoticed.....

[Andromedan Starseed 333]

does anyone know around what time the asteroid is going to pass close to the earth???i am going to watch hopefully at night and hopefully see it.the universe is amazing!!! and mother earth as well.anyway to the people I'm sorry that happen to them and wish you the best of luck and hope everybody gets better real soon!!!especially the children but like i said everyone.like around what time did this happen anyone know more reliable information?as in how bad it really is and etc.

[seeder]

King Cobra 1408, on 15 February 2013 - 08:52 PM, said:

does anyone know around what time the asteroid is going to pass close to the earth??

you'll need to watch the vids then...its already happened









.

Edited by seeder, 15 February 2013 - 09:02 PM.

[shrooma]

@kingcobra,
the meteor has already passed at it's closest point of approach, but it wouldn't have been visible to the naked eye anyway!
there are, however, plenty of good images on the internet of the meteor, so if you just google it, i'm sure something will turn up!
as for the russian meteorite, nobody was killed, most of the injuries were from flying glass, and unfortunately, 200 children were injured, but thankfully, none of them seriously!

[brainiac]

Where are the scientists? How far does the technology went? So nobody can predict this.

[AsteroidX]

99.9% of scientific instruments were pointed at a different Asteroid yesterday.

2m is very small. A black dot on a black background.

Russia may have seen it a minute at the most before it entered the atmosphere. These types of events will not be prevented in the near future.

[Sundew]

Just be glad this didn't happen over Moscow during the height of the Cold War! Where is Slim Pickens when we need him?

Edited by Sundew, 15 February 2013 - 11:03 PM.

[Archimedes]

Professor T, on 15 February 2013 - 07:00 PM, said:

No way was that meteor only 2 meters big..

Surely a rock only 2 meters large wouldn't do that ammount of damage..

The mass has been estimated at ~10 tonnes from what I've read (which would equate to a piece of rock or ice 2-3 meters wide depending on the density)

That's 10,000Kg.

The velocity it entered the atmosphere is estimated to have been 14000meters/sec

Kinetic Energy = 0.5 * mass * (velocity^2) = 0.5 * 10000 * (15,000^2) = ~110 billion Joules

1 kiloton TNT = ~4.2 billion Joules.

Therefore a very rough and ready calculation would suggest that the meteor had the equivalent of the order of a 20 kiloton nuclear bomb.

Edited by Archimedes, 15 February 2013 - 11:16 PM.

[Waspie_Dwarf]

freetoroam, on 15 February 2013 - 07:40 PM, said:

Just do not get how they did not see this one coming.

It's not difficult to understand. This object was tiny and fast moving. Telescopes can not see all of the sky all of the time. It was just too small to be picked up.

Scientists are focusing their efforts on larger objects. Whist is is not great that 900 people were hurt there are objects up their that would wipe out a sizeable proportion of the human race. Fortunately these objects are larger and easier to see.

freetoroam, on 15 February 2013 - 07:40 PM, said:

Maybe they did and knew they could not stop it in time, so instead of causing a panic, they just hoped for the best and  waited to see what the outcome was?

Nope.

freetoroam, on 15 February 2013 - 07:40 PM, said:

Could that happen? would they do that? Instead of warning people because nothing could be done to stop it, they keep it quiet? They know about the ones which are not going to hit Earth, so why not know about the one which will??

Unlikely.
Their are a lot of amateurs with very impressive telescopes these days. It is also no secret how to calculate an orbit from observational data, we've known how to do that since Kepler and Newton in the 16th Century. The scientists simply could not hide an object.

[Archimedes]

shrooma, on 15 February 2013 - 07:10 PM, said:

force=mass x accelaration professor, so something weighing 10t, travelling at 10,000mph would have a kinetic force of 100,000t, and that'd REALLY hurt.....

No, that's all wrong.

Force is indeed mass * acceleration, but 10,000 mph is a velocity, not an acceleration.

Secondly, the units are all completely muddled up. You can't just reckless multiply a mixed bag of units and hope the answer comes out in SI or imperial units.  The result of multiply tonnes * miles / hour is NOT a measure of force in tonnes.

[Waspie_Dwarf]

Russia Meteor Not Linked to Asteroid Flyby

www.nasa.gov said:

A meteor seen flying over Russia on Feb. 15 at 3:20: 26 UTC impacted Chelyabinsk. Preliminary information is that this object was unrelated to asteroid 2012 DA14, which made a safe pass by Earth today. Image credit: Google Earth, NASA/JPL-Caltech
› Larger view    › Related telecon


Preliminary information indicates that a meteor in Chelyabinsk, Russia, is not related to asteroid 2012 DA14, which is flying by Earth safely today.

The Russia meteor is the largest reported since 1908, when a meteor hit Tunguska, Siberia. The meteor entered the atmosphere at about 40,000 mph (18 kilometers per second). The impact time was 7:20:26 p.m. PST, or 10:20:26 p.m. EST on Feb. 14 (3:20:26 UTC on Feb. 15), and the energy released by the impact was in the hundreds of kilotons.

Based on the duration of the event, it was a very shallow entry. It was larger than the meteor over Indonesia on Oct. 8, 2009. Measurements are still coming in, and a more precise measure of the energy may be available later. The size of the object before hitting the atmosphere was about 49 feet (15 meters) and had a mass of about 7,000 tons.

The meteor, which was about one-third the diameter of asteroid 2012 DA14, was brighter than the sun. Its trail was visible for about 30 seconds, so it was a grazing impact through the atmosphere.

It is important to note that this estimate is preliminary, and may be revised as more data is obtained.

http://www.nasa.gov/...oidflyby.html  

DC Agle 818-393-9011
Jet Propulsion Laboratory, Pasadena, Calif.
agle@jpl.nasa.gov

2013-061


Source

[Professor T]

Well.
    before this thread degrades to a boring debate on how to calculate mass with acceleration, or how atronomical events are calculated and how things should be percieved in atronimical circles, I want to say that it it was a beautiful/power thing to witness..
It is a sad shame about the injuries and damages.. But one can't deny that this event was oozing with wowness.. Wish I was there to see it.

[MedicTJ]

Jeremiah65, on 15 February 2013 - 03:24 PM, said:

What is normal?  You mean normal as in the last 100, 200, 300 years?  Normal as in since history has been accurately recorded?  Or normal in the last 4.5 billion years this rock has been circling around the sun?  Russia is huge...statistically speaking by land masses...it will get hit more often.

I am pretty sure this type of thing happened regularly over the "big picture" time scale. No doom...nothing paranormal.

By the way, "not suggesting anything paranormal here. But you HAVE to admit that this isn't normal."  Is one definition of "paranormal"...

I get the condescending snobbery, that's for sure.

Feel better?

[Waspie_Dwarf]

Professor T, on 16 February 2013 - 12:14 AM, said:

But one can't deny that this event was oozing with wowness.. Wish I was there to see it.

Yeah, me too, although, like you, I wish that no one had been hurt.