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Astrophotography and Sketching >> Sketching

Pages: 1

dedo
member

Reged: 06/04/10

Loc: Italy, Rome

The Sun, a first sketching attempt new

#5645462 - 01/27/13 04:30 AM Attachment (19 downloads)

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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Special Ed
Postmaster

Reged: 05/18/03

Loc: Greenbrier Co., WV 38N, 80W

Re: The Sun, a first sketching attempt new

[Re: dedo]
#5645561 - 01/27/13 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.

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dedo
member

Reged: 06/04/10

Loc: Italy, Rome

Re: The Sun, a first sketching attempt new

[Re: Special Ed]
#5645601 - 01/27/13 08:25 AM

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

http://lostpleiadobservatory.blogspot.it/2011/01/making-my-solar-sketches.html

While here is the observation form that I actually used:

http://www.perezmedia.net/beltofvenus/templates.html

Andrea

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Andrev
Carpal Tunnel

Reged: 02/08/11

Loc: Montreal, Quebec, Canada

Re: The Sun, a first sketching attempt new

[Re: dedo]
#5645700 - 01/27/13 09:52 AM

Andrea

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

Andre

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JeanB
scholastic sledgehammer

Reged: 07/11/11

Loc: Montreal, Canada

Re: The Sun, a first sketching attempt new

[Re: Andrev]
#5645736 - 01/27/13 10:14 AM

Terrific work, Andrea! Very professional presentation!

Jean

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PeterDob
professor emeritus

Reged: 07/29/05

Loc: Carù, Italy

Re: The Sun, a first sketching attempt new

[Re: JeanB]
#5645756 - 01/27/13 10:25 AM

Er... Is this your very first solar sketch???

Mamma mia... It's absolutely beautiful! And as Michael already said, the close-ups are gorgeous!

Complimentissimi!!!

Peter

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dedo
member

Reged: 06/04/10

Loc: Italy, Rome

Re: The Sun, a first sketching attempt new

[Re: PeterDob]
#5645789 - 01/27/13 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.

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Special Ed
Postmaster

Reged: 05/18/03

Loc: Greenbrier Co., WV 38N, 80W

Re: The Sun, a first sketching attempt new

[Re: dedo]
#5646066 - 01/27/13 01:24 PM

Quote:

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

http://lostpleiadobservatory.blogspot.it/2011/01/making-my-solar-sketches.html

While here is the observation form that I actually used:

http://www.perezmedia.net/beltofvenus/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.

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dedo
member

Reged: 06/04/10

Loc: Italy, Rome

Re: The Sun, a first sketching attempt new

[Re: Special Ed]
#5646097 - 01/27/13 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

)

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Special Ed
Postmaster

Reged: 05/18/03

Loc: Greenbrier Co., WV 38N, 80W

Re: The Sun, a first sketching attempt new

[Re: dedo]
#5646124 - 01/27/13 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.

Edited by Special Ed (01/27/13 02:01 PM)

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dedo
member

Reged: 06/04/10

Loc: Italy, Rome

Re: The Sun, a first sketching attempt new

[Re: Special Ed]
#5646154 - 01/27/13 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.

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