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The Sun, a first sketching attempt

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#1 dedo

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Posted 27 January 2013 - 04:30 AM

Being the weather been bad, I've spent the last 15 days looking at astronomical sketches and reading abut them. Yesterday, as the clouds cleared I ran out with the scope and here is the result of my very first attempt. Will try again today to document sunspots evolution.

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#2 Special Ed

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Posted 27 January 2013 - 07:38 AM

dedo,

Nice work! I like your solar observation form and those close ups of the three active regions, too. With that scope you have an excellent set up for white light solar observing.

Looking forward to your second sketch. :)

#3 dedo

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Posted 27 January 2013 - 08:25 AM

Thank you Michael, as for the technique I have followed this tutorial:

http://lostpleiadobs...r-sketches.html

While here is the observation form that I actually used:

http://www.perezmedi.../templates.html

Andrea

#4 Andrev

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Posted 27 January 2013 - 09:52 AM

Andrea

Beautiful first sketch. Very interesting the three isolated regions. Nice presentation.

Andre

#5 JeanB

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Posted 27 January 2013 - 10:14 AM

Terrific work, Andrea! Very professional presentation!

Jean

#6 PeterDob

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Posted 27 January 2013 - 10:25 AM

Er... Is this your very first solar sketch??? :shocked: Mamma mia... It's absolutely beautiful! And as Michael already said, the close-ups are gorgeous!

Complimentissimi!!! :bow:

Peter

#7 dedo

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Posted 27 January 2013 - 10:47 AM

Thank you all, today's Sun is on it'way too.
Peter, your drawings on the It.forum was very inspiring to me.

#8 Special Ed

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Posted 27 January 2013 - 01:24 PM

Thank you Michael, as for the technique I have followed this tutorial:

http://lostpleiadobs...r-sketches.html

While here is the observation form that I actually used:

http://www.perezmedi.../templates.html

Andrea


Well, you have picked some very good sources to refer to, but are you aware that Alan Strauss's tutorial is for sketching the Sun in H-alpha, not white light? He prepares his solar disk to render the Sun's chromosphere, not the photosphere seen in WL.

#9 dedo

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Posted 27 January 2013 - 01:38 PM

Yes Michael, I'm aware of that but it's also the first time that I can see the granulation so clearly and I wanted to render it in some way.
Of course, as a newcomers, I'open to all of your excellent advices (of course, please, don't tell me to buy an h-alpha scope or, better yet, tell it to my wife :D)

#10 Special Ed

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Posted 27 January 2013 - 01:55 PM

Andrea,

I had an idea you might be able to see solar granulation with a six inch refractor and were trying to render it. :) I usually can't see granulation well enough to do anything about including it.

I would also suggest that you look for the limb darkening that is usually apparent in WL and also faculae if any active regions are near the solar limb. Faculae are not always detectable if the seeing and/or transparency are not good but the limb darkening is usually visible. I believe you may have seen some faculae and included it.

Anyway, your drawings are excellent and much better than my 1st and 2nd attempts. :grin:

#11 dedo

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Posted 27 January 2013 - 02:18 PM

Yes, I've clearly seen faculae and granulation and tryed to render it with a sharp eraser. For the truth I've clearly seen faculae and granulation with my precedent refractor too which was only an 80/480 apochromat, but here is very very obvious.
Limb darkening was not as obvious however.

#12 Aquarellia

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Posted 27 January 2013 - 04:48 PM

Excellent Andrea, you are on the good way !

#13 Jef De Wit

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Posted 28 January 2013 - 04:49 AM

Great sketches! If this is number 1, I guess number 10 will be a masterpiece :goodjob:

#14 Undermidnight

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Posted 28 January 2013 - 08:07 AM

Ok, I am going to go back and throw away my first sketches.. :grin:

Yours is absolutely wonderful!!! I too like the way it was presented.

:waytogo:

Jason

#15 niteskystargazer

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Posted 28 January 2013 - 01:04 PM

Dedo,

Very good 1st sketch of the Sun :cool:.

CS,KLU,

:thanx:,

Tom






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