(meteorobs) Daytime telescopic video meteor work possibility?

[Ed Majden]

Thomas:
	Thanks for sharing your photo.  Interesting!  With my filtering idea  
I was hoping to record a much larger field of view which has proven  
not to work so far.  A telescopic narrow f.o.v. is a different matter  
and should work for bright meteors.  Let us know if you succeed in a  
capture.
Ed

On 30-May-10, at 8:07 AM, Thomas Ashcraft wrote:

> Hi Ed, Chris, all,
>
> Thank you for your input.
>
> What I am thinking about is the possibility of daytime telescopic
> observing without any special filtering and using the basic camera
> settings to attain contrast.  I was surprised to be able to image
> Jupiter in a bright sky amidst a dark background merely by  
> adjusting the
> DMK 41 camera gamma/exposure settings.  Hence, I was thinking that  
> there
> might be a possibility of doing some sort of daylight Arietid  
> telescopic
> work, aiming directly towards the radiant.
>
> For what it is worth, I made a short video clip of Jupiter in daylight
> in order to show the sky background. I think there is enough contrast
> enhancement for meteors to show up with an unfiltered camera. I would
> not attempt to do full sky work, rather perhaps just Arietid or zeta
> Perseid radiant monitoring to see if a few meteors might be captured.
>
> .mp4  1.7 MB  :  http://www.heliotown.com/Jupe_Daylight_Ashcraft.mp4
>
> Thomas
>
>
>
>
> Ed Majden wrote:
>> Thomas:
>> 	I speculated on trying to record daytime meteors using a very narrow
>> band Na 1 filter thinking it would make the background sky dark
>> except for the Na 1 line where meteors have strong emissions!  The Na
>> 1 line is a Solar absorption line rather than emission line so it
>> should not present a problem.  Good idea, except it does not work!
>> The filter has too much leakage at other wavelengths so the sky is
>> still to bright.  I was hoping it would work like a Ha-solar filter
>> used to view prominences.  I have a Lumicom Solar prominence filter
>> which uses a tuneable filter at the eyepiece end and a pre-filter
>> used on the objective. If you look through either filter alone you
>> can see through them, but when combined it isolates the Ha-line to a
>> width of ~1-1/2 A.  Perhaps someone can figure out how to do the same
>> with a Na 1 filter.  I speculate that it will probably not work as
>> Na-1 meteor emissions are rather faint and the Solar Ha emissions are
>> still very bright so you can see the prominences.  You need a filter
>> that is opaque across the entire spectrum but clear for the Na 1
>> meteor emission line.  Spec sheets indicate that narrow band filters
>> will do this but they won't.  They still have leakage at other
>> wavelengths darn it!
>>
>> Ed Majden - Meteor Spectroscopy
>> Courtenay, B.C. Canada.
>>
>>
>> On 29-May-10, at 8:19 AM, Thomas Ashcraft wrote:
>>
>>
>>> The other day I was tracking Jupiter in the daylight sky with a  
>>> 100 mm
>>> refractor, Celestron CG5-gt mount and a DMK 41 video camera.   I had
>>> Jupiter in sight on my pc screen with good contrast until I  
>>> stopped at
>>> 10 am on a bright sunny morning.
>>>
>>> This makes me ponder the possibility of using this telescope system
>>> for
>>> the daytime Arietids.  I am thinking of training the telescope on  
>>> the
>>> Arietid radiant and seeing if it might capture some daytime streaks
>>> with
>>> the DMK 41 at a high contrast or gamma setting.
>>>
>>> I am wondering if anyone does or has done daytime telescopic meteor
>>> observing?
>>>
>>> Are there any papers or articles of this daytime possibility or web
>>> links on this subject?
>>>
>>> Thank you in advance for any information on this subject.
>>>
>>> Clear skies,
>>> Thomas
>>>
>>>
>>> Thomas Ashcraft  |  New Mexico
>>> _______________________________________________
>>> Mailing list meteorobs: meteorobs at meteorobs.org
>>> To UNSUBSCRIBE, email: owner-meteorobs at meteorobs.org
>>> http://lists.meteorobs.org/mailman/listinfo/meteorobs
>>>
>>
>> _______________________________________________
>> Mailing list meteorobs: meteorobs at meteorobs.org
>> To UNSUBSCRIBE, email: owner-meteorobs at meteorobs.org
>> http://lists.meteorobs.org/mailman/listinfo/meteorobs
>>
>>
>>
>
> _______________________________________________
> Mailing list meteorobs: meteorobs at meteorobs.org
> To UNSUBSCRIBE, email: owner-meteorobs at meteorobs.org
> http://lists.meteorobs.org/mailman/listinfo/meteorobs