(meteorobs) Long path meteor -spiraling- *Magnified*

[eric at meteoritesusa.com]

Just curious...

Almost all of the videos/movies claiming spiraling meteoroids have  
been "explained away" as either equipment malfunction (shaking) and/or  
software issues, and even operator error.

Is there some bias against spiraling meteoroids or something? Why it's  
so hard for people to believe that spiraling/tumbling meteoroids happen?

Regards,
Eric



Quoting Thomas Ashcraft <ashcraft at heliotown.com>:

> Follow-up to the post regarding possible rotation visible of the meteor
> when magnified:
>
> It was suggested off-list that the apparent rotation was due to
> interlacing and software processing artifacts.  As a test, I processed
> and magnified a video of a similar meteor from my archives and I now
> think the "rotation" is indeed a product of the software processing as
> it also shows rotation.  Here is a quick test movie and I did not add
> text or labels:
> http://www.heliotown.com/Meteorrotationtest_Ashcraft.mp4
>
> Thomas in New Mexico
>
>
> On 12/1/11 7:41 PM, Thomas Ashcraft wrote:
>>> UPDATE:
>>>
>>> On 12/1/11 8:23 AM, Thomas Ashcraft wrote:
>>>> Dec 01, 2011  2:35:54 am MST.
>>>>
>>>> There was a very long path meteor over north-central New Mexico last
>>>> night.  Visible flight time lasted ~ 13 seconds.
>>>>
>>>> All-sky camera view with stereo forward scatter:   Movie.  1 MB  .mp4
>>>> format.
>>>>
>>>> http://www.heliotown.com/FBs20111201_093554ut_Ashcraft.mp4
>>>>
>>> Update to previous post:
>>>
>>> For further analysis I magnified this meteor in Final Cut Express (movie
>>> making software for Macs) and slowed it down and it is interesting to
>>> see this particular meteor clearly spiraling.
>>>
>>> Here is a longer movie that includes the magnification.  4 MB  .mp4 format
>>> http://www.heliotown.com/FBmagDec012011_093554ut_Ashcraft.mp4
>>>
>>> Thomas Ashcraft near Santa Fe
>> Further update:
>>
>> Someone suggested that the apparent spiraling of the meteor may be
>> interlacing artifacts and could also be frame grabber artifacts.
>>
>> Any further analysis is welcome. Thank you.
>>
>> Thomas in New Mexico
>>
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