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Craters Aristotles and Eudoxus May 19, 2010

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#1 frank5817

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Posted 29 May 2010 - 09:17 AM


Aristoteles is 87 km in diameter and a large Eratostherian era crater with just some minor central peaks and steep walls. The ejecta melt was clearly visible to the north. Eudoxus is slightly smaller (70 km.) and younger as it is a Copernican era crater and has steeper walls with a heavily shadowed floor at the time of the sketch.

Sketching:

Black Canson paper 9” x 12” and white pastel pencils

10 inch f/5.7 Newtonian 6mm eyepiece (241x)
5/19/2010 20:45 pm or
5/20/2010 1:45 UT
Colongitude 348.9 °
Lunation 6 days
39.7% illum
Temp 70 degrees
Mostly cloudy
Seeing 3/5
Transparency 2/5

See Rükl - Atlas of the Moon, Plates 5 and 13

Frank McCabe :)

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#2 CarlosEH

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Posted 29 May 2010 - 10:00 AM

Frank,

Outstanding observation of Aristotles and Eudoxus. You have captured the crater floors, walls and shadows very nicely. Lots of detail over the environs as well. Thank you for sharing it with us all.

Carlos

#3 JayinUT

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Posted 29 May 2010 - 12:05 PM

Frank,

Outstanding. Love the details and the 3D affect on the walls. The crevasses and detail are excellent and the rilles are excellent (are they rilles?).

#4 rerun

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Posted 29 May 2010 - 12:42 PM

Frank,

very realistic sketch of these craters. :bow: :bow: :bow:
I feel like looking through my eyepiece.

CS

Markus

#5 Tommy5

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Posted 29 May 2010 - 04:23 PM

Very nice sketch of this lunar crator,very realistic as others have mentioned.

#6 frank5817

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Posted 29 May 2010 - 05:42 PM

Carlos, Jay, Markus and Tommy,

Thank you all for your nice words.

Frank :)

#7 Special Ed

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Posted 30 May 2010 - 06:11 AM

Great work, Frank! Very detailed--and the craters stand up on the paper. :cool:

#8 Uwe Pilz

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Posted 30 May 2010 - 09:03 AM

Great oberservation! You know I like your sketching method.

#9 frank5817

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Posted 30 May 2010 - 10:01 AM

Michael and Uwe,

Thank you both. I hope you gentlemen get to sketch much in the days ahead.

Frank :)

#10 Dave Chapman

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Posted 30 May 2010 - 11:28 AM

Very nice indeed. Have you described your technique somewhere?

#11 Jef De Wit

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Posted 30 May 2010 - 11:56 AM

Frank
Your sketch is a joy for the eye! I wonder always how you get so much fine details on paper.

#12 frank5817

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Posted 30 May 2010 - 09:35 PM

Dave and Jef,

Thank you both for your kind words.
---
Dave,

I began astronomical sketches just for myself in my observing logs long ago using a number 2 graphite pencil, sometimes even a ball point pen. I didn't get serious about Astronomical sketching until I joined Cloudy Nights and met up with Rich Handy (KraterKid). He and Erika Rix and a few others inspired me to move on in sketching and I read and used many of the tutorials at the top of the Sketching Forum when I got stuck. Also they are both co-authors of the book: "Astronomical Sketching: A Step by Step Introduction"by R. Handy, D. Moody, J. Perez, E. Rix and S. Robbins. This is an excellent work for teaching astronomical sketching in various medias and of all types of astronomical targets. I highly recommend you get a copy and read and use it carefully.
The telescope I like to sketch with most frequently is a 10" f/5.7 Dobsonian. I sometimes use a 13.1" f/6, 4.25" f/5 and an 18" f/5 but currently I don't have a working equatorial platform for the 18".
Usually I sketch standing at the eyepiece using a clipboard.
For lunar sketching I use much light because it really does not intefere in any way but only makes it easier. I prefer to sketch with black paper and white pastel pencils and Conte'crayons because they erase easily and I can control the brightness with just a change in pressure. For areas that are in dark shadow you can erase or also add black pastel pencil which I do most often. Fingertips work well for blending in the bright background and I have a pretty good eye for shapes and judging sizes. After lightly sketching in the shadows and light areas in outline it is just a matter of going after the detail. I have yet to include all the detail I can see at the eyepiece in a sketch. I try not to sketch more than I know I can do in a reasonable amount of time. I made 50+ lunar sketches from photographs before I ever did a lunar sketch at the eyepiece in white on black. After using graphite on white paper it was like starting over from scratch. I struggled for weeks before I started to get it. A person with artistic talent could probable do well on the first try. Some of the folks sketching here fall in that category.

----

Jef,

I have never been able to sketch all the detail I can see at the eyepiece-- I try to keep the sketches to about 1.5 hours or less. I can't do more than two sketches in an evening because sketching drains all my energy.

Frank :)

#13 frank5817

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Posted 30 May 2010 - 09:40 PM

Dave,

I clicked on the link to your new sketches. Why am I telling you about how to sketch you should be telling me! Those are beautiful lunar sketches. :) :cool: :rainbow: :bow:

Frank :)

#14 niteskystargazer

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Posted 04 June 2010 - 10:48 AM

Frank,

Very nice sketch of the Aristotles and Eudoxus Craters. :)

:thanx:,

Tom

#15 frank5817

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Posted 04 June 2010 - 10:22 PM

Tom,

Thank you, our next good views of these two will be the 17th and 18th of this month.

Frank :)






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