back to article Mother of Chelyabinsk spotted

Spanish astronomers looking for the origins of the meteor that came scarily-close to the Russian city of Chelyabinsk last February believe they've spotted a cluster of as many as 20 objects that are possible candidates. The Chelyabinsk superbolide, which damaged buildings, caused injuries on the ground and gave rise to a …

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Where's VHI when you need them.

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Meh

In summary...

"We may have found its origin, or we may have not"

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Alien

*$#£+!

Translation: Damn, we've been rumbled! Quick, lads, chuck a few more rocks at them before they figure out how to deal with our attack!

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Re: *$#£+!

Wonder if they found any incinerated bugs on that asteroid...

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Re: *$#£+!

"Wonder if they found any incinerated bugs on that asteroid..."

Don't know about that, but I recall a Russian politician who blamed the US for the bolide.

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Wait a minute

How can they possibly know that the original object got whacked between 20 and 40 thousand years ago ?

I'm curious. These objects are in space, and we haven't gotten near them. The one object that we did get near to got scorched by reentry. Is there enough data left to determine that interval in a single, earth-atmosphere-burned chunk of space rock ?

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Re: Wait a minute

Presumably by projecting their orbits backwards in an anti-extrapolary way to fix the moment when they were all in the same place.

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Re: Wait a minute

Maths. Lots and lots of maths. We've plotted the orbits of many trans-Neptunian objects (including the not-planet Pluto) despite not having known about them long enough to have observed anything like their full orbits. We just plug what we do know into our gravitational models of the star system and let the computer do the rest.

Over-simplifying, naturally.

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Re: Wait a minute

Anti-extrapolary, I like that term.

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Re: Wait a minute

Me too, although extrapolation can be at both ends.

How about ante-extrapolary?

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