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Filament size, Aug 6, 2012 wins

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#1 raylal

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Posted 24 February 2013 - 02:49 PM

Thought I would compare the size of the large filament from last week to the Aug. 6, 2012 monster filament. The August filament wins by over 100,000 km.

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#2 Andy Devey

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Posted 24 February 2013 - 04:14 PM

Hi Ray

How accurately did you correct for the curvature of the Sun?

The August one was certainly more explosive here it was at almost the same aspect as the 18 February one

Regards

Andy

Filament on 4 August 2012

#3 raylal

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Posted 25 February 2013 - 06:41 AM

Hi Andy,
I do say approximate. I only claculate the length of the line that I draw, do not make account for the curves nor the curvature of the sun etc...
That is a beautiful movie of Aug. 4th, lots of movement.
Ray

#4 rigel123

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Posted 25 February 2013 - 10:18 PM

That's cool Ray!

Andy, how much time does that animation portray of that filament? That is an amazing video!

#5 Andy Devey

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Posted 26 February 2013 - 03:36 AM

Hi Warren the video runs from 12:18UT to 13:27UT on 4 August 2012 and I used my PST at 0.8m focal length.

Ray, I was inspired by your stunning photos and so I did some internet research to see if any one had put anything together on a simple method of how to estimate the length of solar filaments and came up with nothing?

I have an idea of putting something together as a draft document and then posting it on this forum to invite comments. Can I use your two excellent full disc photographs posted above as a basis for this document and I shall certainly credit them to you.

Regards

Andy

#6 raylal

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Posted 26 February 2013 - 06:51 AM


For sure Andy, please do. I would be interested in finding out more.

Ray

#7 raylal

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Posted 26 February 2013 - 07:22 AM

Here is a very interesting site where I picked up some of my information from Guy Buhry https://sites.google...ie/brico-utiles
Attached is the very useful solar ruler from Guy Buhry.

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#8 raylal

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Posted 26 February 2013 - 07:25 AM

Did not come out very well, but the original version is downloadable from his site.

Ray

#9 rigel123

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Posted 26 February 2013 - 08:07 AM

[quote name="Andy Devey"]Hi Warren the video runs from 12:18UT to 13:27UT on 4 August 2012 and I used my PST at 0.8m focal length.

Thanks! That takes patience!

#10 Andy Devey

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Posted 26 February 2013 - 10:39 AM

Hi Ray

You just saved me a lot of work - no point trying to reinvent the wheel!

Regards

Andy

#11 Andy Devey

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Posted 02 March 2013 - 09:46 AM

Hi Ray, I am working with Guy and putting something together. Is there any chance you could post the two photos from above separately and without the distance arrow included?

Regards

Andy

#12 raylal

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Posted 02 March 2013 - 03:53 PM

Sure thing, my pleasure.

Ray

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#13 raylal

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Posted 02 March 2013 - 03:54 PM

Here is Feb 18th.

Ray

#14 raylal

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Posted 02 March 2013 - 03:57 PM

Let me know if that works Andy.

Ray






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