[meteorite-list] A Twisted Meteor Trail Over Tenerife

[bill kies]

Wouldn't it be much easier to demonstrate the effects that are being discussed instead of going on verbally? If you can reproduce the effect with your own equipment it would settle the issue and educate us all.
 
Thanks,
Bill
 


----------------------------------------
> Date: Wed, 2 Jun 2010 21:28:53 -0400
> From: mike.hankey at gmail.com
> To: sterling_k_webb at sbcglobal.net
> CC: meteorite-list at meteoritecentral.com; ROBERT.D.MATSON at saic.com
> Subject: Re: [meteorite-list] A Twisted Meteor Trail Over Tenerife
>
> So if the bump/vibration theory is true for this recent picture, is it
> also true for this picture:
>
> http://apod.nasa.gov/apod/ap050202.html
>
> On Wed, Jun 2, 2010 at 8:48 PM, Sterling K. Webb
> wrote:
>> Hi, Listoids,
>>
>> Rob is right. As usual.
>>
>> Not having done any astrophotography, I had
>> the trail direction wrong and a misconception
>> of the duration of the event.
>>
>> Obviously, I need more coffee...
>>
>>
>> Sterling K. Webb
>> --------------------------------------------------------------
>> ----- Original Message ----- From: "Matson, Robert D."
>> 
>> To: 
>> Sent: Wednesday, June 02, 2010 6:51 PM
>> Subject: Re: [meteorite-list] A Twisted Meteor Trail Over Tenerife
>>
>>
>>> Hi Sterling,
>>>
>>>> If there was a "bump" during the last few seconds of a 1-minute
>>>
>>> exposure,
>>>>
>>>> the exposure of the right-most 97% of the trail would be 97% complete
>>>
>>> --
>>>>
>>>> and straight. Only the left end would be "wiggled." Wiggling of the
>>>
>>> right
>>>>
>>>> end would be very, very faint, if visible at all. Not a bump.
>>>
>>> I'm not sure I follow you. A bump (and the meteor) could have occurred
>>> at
>>> any time during the exposure, not just the beginning or end.
>>>
>>>> However, the sinusoidal "motion" can be traced back to the start of
>>>
>>> the
>>>>
>>>> trail. There are slightly more than 8 full cycles recorded, each of
>>>> increasing amplitude.
>>>
>>> *Increasing* amplitude? So you are suggesting that the meteor was rising
>>> as seen by the observer? While this is certainly possible (e.g. a very
>>> shallow entry angle), it is far more likely that the meteor was moving
>>> left to right in this image, not right to left. I believe the bump
>>> (whether by wind, bat, bug, human or magna) occurred a little before
>>> the meteor first appeared, perfectly explaining the appearance of the
>>> trail: high initial amplitude, damped down to nothing after 8 or 9
>>> cycles. --Rob
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