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Active Region 1164 March 1st

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#1 Dee

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Posted 06 March 2011 - 06:53 PM

AR 1164
Bray Co Wicklow Ireland

March 1st
Active Region 1164 Experimental Sketch 2 March 1 st 2011 Pastel and a craft needle on black paper PST 40 h alpha, 40 mm TVP eyepiece.

I observed Active Region 1164 between 10:46 UT and 11:30 UT. Once again I tried an experimental sketch, an attempt to figure out the best media and methods
to capture the sun in a sketch.

The sunspot group as a whole was more prominent even in h alpha at the tuning point where all other active elements were visible.

The main spot was clearly two spots close to each other with one having an elongated umbra. The penumbra for these two large spots was clearly visible when the PST was tuned to the point when only the sunspot group was visible.

Long dark clearly malleable filaments danced around the entire area while waves of fibrils curved and heaved their way through the solar chromosphere along magnetic field lines.

At 11:17 UT four brighter areas appeared close to the sunspots. In this sketch I removed material instead of adding it in my quest to achieve an accurate rendition of what I can see with my eyes at my telescope.

Deirdre Kelleghan
My Website

Check out my painting on this NASA page

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#2 Asbytec

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Posted 06 March 2011 - 07:56 PM

Another impressive work of art, Dee. And I do mean work of art...I'm impressed. :)

#3 frank5817

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Posted 06 March 2011 - 10:22 PM

Dee,

A beautifully created sketch done in your usual impressive style. Love it along with the NASA posted sketch.
Wonderful to see here. :flower: :flower:

Frank :)

#4 Dee

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Posted 07 March 2011 - 08:02 AM

Thanks Norme, thanks Frank and glad you took a visit to the NASA site :-)

Deirdre

#5 Special Ed

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Posted 07 March 2011 - 12:14 PM

Dee,

A fine H alpha rendering. :) Using the needle to create the fibrils and active region filaments (ARF) works nicely. Rendering the appearance of fibrils in Ha is something I'm still working on. I seem to remember you using needles on lunar sketches a while back to create certain effects.

#6 CarlosEH

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Posted 07 March 2011 - 07:47 PM

Dee,

An excellent observation of the active region 1164. Your experimental sketch using a needle has captured the sunspot group/umbra/penumbra very nicely. Thank you for sharing it with us all.

Carlos

#7 markseibold

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Posted 08 March 2011 - 03:09 PM

Dee

Very nice sketch work of this active region on the sun. :bow: :bow: :bow: I first saw your sketch in NASA's Spaceweather today and I appreciated your description of how and why you focused on a wide region to render the sketch as I related closely to your methods in this regard.

I look forward to seeing your continued observations and sketch work.

Mark

#8 Dee

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Posted 08 March 2011 - 06:46 PM

Thanks everyone

Michael yes you are right re needles I first used a craft needle in 2007 for lunar sketching .

#9 Dee

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Posted 08 March 2011 - 06:48 PM

Thanks everyone

Michael yes you are right re needles I first used a craft needle in 2007 for lunar sketching on CN.

Wander with a needle lunar sketch

Deirdre Kelleghan
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