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Astrophotography and Sketching >> Sketching

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Jef De Wit
Carpal Tunnel


Reged: 03/06/09

Loc: Hove, Belgium
Saturn in pastel
      #3765694 - 04/24/10 03:19 PM Attachment (79 downloads)

Yesterday the view of Mars was disappointing so I turned to Saturn. I already observed the planet before, but couldn't see the details that other observers here on CN (like the Cassini-division) can see.
The shadow of the ring on the planet was the most easy thing to see. The opening of the ring was visible at moments of good seeing. The shadow of the planet on the ring was very difficult to see.
On the planet I find it very hard to see the bands. The Zone Equatorial is as bright as the ring (I couldn't see the ring before the planet). The South Equatorial Band was small. The North Equatorial Band was much larger but more difficult to see.
I did the sketch without a preprint form (I figured out that the ring is 2.25 times the planet). First I put everything on yellow. After that I darkened (mostly to much ) some regions with black.

Two questions:
1) Freeware Winjupos gives two numbers for declination of earth: 2.1°, B" 2.6°. Which one is the correct for noting the tilt of the planet?
2) Does filters help? I tried my standard set (yellow, red, blue and green) without succes.

All comments are welcome because I felt that sketching Saturn is something quit different than sketching Mars!

23/04/2010, 21.30 UT, alt 42°, diam 19.2", mag 0.8, 12" dobson @ x300 + apodizing mask, pastel pensils and rubber shaper, original sketch is 13x6cm

Edited by Jef De Wit (04/24/10 03:21 PM)


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Tommy5
Carpal Tunnel


Reged: 03/28/04

Loc: Chicagoland
Re: Saturn in pastel new [Re: Jef De Wit]
      #3765921 - 04/24/10 06:25 PM

very good saturn sketch, nice use of color.

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Kris.
Carpal Tunnel
*****

Reged: 09/16/04

Loc: Belgium
Re: Saturn in pastel new [Re: Tommy5]
      #3766106 - 04/24/10 08:16 PM

that's exactly how saturn looked through my 12" dob at the same time! haven't seen the casini division either this year, i think we need excellent seeing for that. i do like the fact it's much easier to spot the sattelites close to the rings, now they're still very closed. i think perhaps any sort of filter can help to bring out the belts more, with 12" aperture the disk is pretty bright.

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frank5817
Postmaster
*****

Reged: 06/13/06

Loc: Illinois
Re: Saturn in pastel new [Re: Kris.]
      #3766292 - 04/24/10 10:18 PM

Jef,

When I read what you wrote and and looked at your sketch-- I said to myself what Kris said, "that's exactly how" I saw saturn a few days back.
I generally don't like to use filters on Saturn.
I love your sketch through the yellow filter.

Frank


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Jef De Wit
Carpal Tunnel


Reged: 03/06/09

Loc: Hove, Belgium
Re: Saturn in pastel new [Re: frank5817]
      #3766672 - 04/25/10 06:04 AM

Tommy, Kris and Frank. I'm happy you like the sketch.

@ Kris: let me know if you get any results with filters. I have no problems with Saturn being to bright (like Mars).

@ Frank: I sketched Saturn without yellow filter.


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rerun
super member


Reged: 03/22/09

Loc: Germany Mülheim an der Ruhr
Re: Saturn in pastel new [Re: Jef De Wit]
      #3766767 - 04/25/10 08:03 AM

Hallo Jef,

great sketch of Saturn,you meet the colours very accurate,better than I did.
For me sketching Saturn is more difficult than sketching Mars,without preprint form it is much more difficult.


CS

Markus


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dweller25
Pooh-Bah


Reged: 08/30/07

Loc: Lancashire, UK
Re: Saturn in pastel new [Re: rerun]
      #3766932 - 04/25/10 10:15 AM

Jef, great drawing.

Oddly I find my 5" refractor much better on Saturn than the 8" reflector - I believe due to it's lower altitude = worse seeing.

The opposite was true with Mars but that was much higher.

Have you tried with your refractor ?

Clear skies.


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Jef De Wit
Carpal Tunnel


Reged: 03/06/09

Loc: Hove, Belgium
Re: Saturn in pastel new [Re: dweller25]
      #3767227 - 04/25/10 12:40 PM

Markus and Dweller

@ Markus: I agree, Saturn is a quit different planet than Mars. You need an other strategie to sketch.

@ Dweller: I also look at Saturn with my 8 cm WO. It gives a very nice view, but gives less more detail (no opening of the rings).


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mathteacher
Carpal Tunnel
*****

Reged: 05/13/07

Loc: Oakland, CA
Re: Saturn in pastel new [Re: Jef De Wit]
      #3768550 - 04/25/10 10:16 PM

I would call this a success!

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Jef De Wit
Carpal Tunnel


Reged: 03/06/09

Loc: Hove, Belgium
Re: Saturn in pastel new [Re: mathteacher]
      #3769315 - 04/26/10 11:07 AM

Thanks for the nice words, Mathteacher. But I don't call my sketch a "success". I rather say a success to this sketch of Serge Vieillard.

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frank5817
Postmaster
*****

Reged: 06/13/06

Loc: Illinois
Re: Saturn in pastel new [Re: Jef De Wit]
      #3769397 - 04/26/10 11:56 AM

Jef,
Don't be too hard on yourself. Your sketching is great. Serge is a veteran and one a the very best at sketching the night sky. In addition he has a rare, very special intangible gift for art.
Your sketches are always a success.

Frank


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niteskystargazer
Carpal Tunnel
*****

Reged: 10/05/09

Loc: 41-43'-28" N 87-42'-39" W
Re: Saturn in pastel new [Re: Jef De Wit]
      #3769445 - 04/26/10 12:19 PM

Jef,

, nice sketch .

,

Tom


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Jef De Wit
Carpal Tunnel


Reged: 03/06/09

Loc: Hove, Belgium
Re: Saturn in pastel new [Re: niteskystargazer]
      #3771784 - 04/27/10 02:31 PM

@ Tom: I'm glad you like the sketch.

@ Frank: I went to the website of Serge. That's impressive! He's not only gifted in astrosketching and art. He also gifted in writing some very difficult sentences. When he talkes about sketching, you think you're reading a filosophical treaty. Even my French speaking wife did wrinkle her eyebrows.


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CarlosEH
Postmaster
*****

Reged: 01/19/05

Loc: Pembroke Pines, Broward County...
Re: Saturn in pastel new [Re: Jef De Wit]
      #3772943 - 04/28/10 01:52 AM

Jef,

An excellent observation of Saturn in pastel. You have captured the golden-yellow color of the planet very nicely. You also recorded a thin South Equatorial Belt (SEB)and bright Equatorial Zone (EZ). Thank you for sharing it with us all.

Carlos


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Jef De Wit
Carpal Tunnel


Reged: 03/06/09

Loc: Hove, Belgium
Re: Saturn in pastel new [Re: CarlosEH]
      #3773249 - 04/28/10 09:44 AM

Thanks, Carlos!

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ladip63
scholastic sledgehammer


Reged: 10/17/07

Loc: the dark skies of Texas
Re: Saturn in pastel new [Re: Jef De Wit]
      #3773372 - 04/28/10 10:50 AM

Jef
Very nice sketch of Saturn.


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Jef De Wit
Carpal Tunnel


Reged: 03/06/09

Loc: Hove, Belgium
Re: Saturn in pastel new [Re: ladip63]
      #3775294 - 04/29/10 11:15 AM

Lynn

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markseibold
Carpal Tunnel


Reged: 01/19/08

Loc: Portland Oregon
Re: Saturn in pastel new [Re: Jef De Wit]
      #3777073 - 04/30/10 02:52 AM

Jef

Nice pastel rendering of Saturn Looks exactly like I observed it a few nights ago with the public at an outside restaurant courtyard, even though smaller through a 5 inch Celestron Nexstar 5i Cassegrain.

Thanks for posting as you've inspired me to possibly do another large Saturn sketch soon as I noticed from your rendering that the rings have gone a little more toward the edge-on view again.

Mark
www.markseibold.com
My CN Gallery


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Jef De Wit
Carpal Tunnel


Reged: 03/06/09

Loc: Hove, Belgium
Re: Saturn in pastel new [Re: markseibold]
      #3778023 - 04/30/10 02:23 PM

Mark
I'm glad you liked my sketch and I'm looking forward for another sketch of your hands!


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markseibold
Carpal Tunnel


Reged: 01/19/08

Loc: Portland Oregon
Re: Saturn in pastel new [Re: Jef De Wit]
      #3779199 - 05/01/10 07:10 AM

Well thanks Jef but I've been warned by many people to leave my hands out of the sketches. Although that could go into another art forum as I'm also advised now to keep my eyes away from the eyepiece and simultaneously sketching as apart as it has caused tremendous eye strain. My tremendous eyes problems on long sketches and especially of the moon for long hours has taken a toll on my eyes lately.

As much as I'd like to do a much larger work as oil paints on canvas, I'm procrastinating allot lately.

We'll see, but thanks for the encouragement.

Mark


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