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Can't agree that it's a spiralling meteor explanation for the following reasons:
1. Look at the deviations from the straight line. If the meteor is say, 70km up when it hits the air, then the fact that you can actually see the deviations makes them deviations of many kilometres. Given that this meteor vaporised quickly, then it is likely to be no more than small pebble or sand grain size.
2. After deviating so many km, it then does a series of very, very sharp turns before straightening out. What forces are acting upon a very small piece of rock no more than a few grams in weight at best, to cause this?
3. If we are actually observing the rotation of the meteor then, as per 1,the thing is at least several km wide! Consider what you are seeing in the pic then consider the angular size in arc seconds at that distance and the object must be massive. if it were so then it would have ploughed into the Earth and made a serious mess.
4. I agree with Peter that you are looking at a satellite as it has no ramp up of light as photographic meteors typically have- this thing just appears, turns 90 degrees at least several times then straightens out with no apparent loss of luminance - if it was a meteor it would have hit the earth a few seconds later.
Richard
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