Quote from: R7 on 02/17/2013 05:54 pmMany videos seem to show that there was twin contrail from the beginning of reentry. Weird? I've been thinking about this as well. Seems implausible to me that it was a binary from the moment it entered atmosphere or that it split into two roughly equal pieces so soon after entry. Also, I don't believe we've ever really seen a big meteor vapor trail like this from almost underneath. A unique vantage point.I'm wondering if it was convection that split it in two. When you have a spherical mass of hot air (like a nuclear fireball), convective movement and resulting vacuum effects quickly produce a rotating toroidal cloud. Maybe what we see here is is what happens with a "cylindrical" fireball? It splits into two, like a cross section of a toroidal cloud?
Many videos seem to show that there was twin contrail from the beginning of reentry. Weird?
Many videos seem to show that there was twin contrail from the beginning of reentry. Weird? Are the aerodynamic forces big enough to brake the meteor before contrail begins to form?Propeller hat idea 1: It did skip elsewhere, broke and two pieces reenteredPropeller hat idea 2: Moon perturbed and broke it in the process.Propeller hat idea 3: The Bugs have discovered a chain shot.
...No need to assume a clean split in 2 equally-sized fragment to explain the dual contrail. ...
Fingers aren't enough, but light hummer will do.
I think this is really simple.... The meteor was probably symmetrical
Convection current dragged up the middle of the cloud. lateral parts remained at its height. Therefore, when looking from the bottom seems to be two tracks. In fact, one track has been transformed like at atmospheric nuclear explosion appears mushroom cloud.
Viktor Gorohvski from Ural State University have just released the results of first analyses of the recovered fragments of meteorite:http://www.gazeta.ru/social/news/2013/02/17/n_2759605.shtmlIt belongs to H-chondrites, not surprisingly as it is the most abundant type.They are pretty brittle, e.g. you can crush H3 just with bare fingers. I did it many times - placing the sample in thin-wall Teflon tube and squeezing it then with fingers. So, it is like the weakest sandstone, even worse.H5 and H6 are stronger, you can compare them with lowest grade concrete, poorly processed. Fingers aren't enough, but light hummer will do.
And amazingly - the shock effect is quite mild
[0:07 flash, 1:36 shock wave.
I would even have expected dead birds falling from the sky
Quote from: hektor on 02/18/2013 10:30 amI would even have expected dead birds falling from the skyHuh, why?
Found another video of Korkino.