frank5817
Post Laureate
Reged: 06/13/06
Posts: 4095
Loc: Illinois
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While observing the moon on the last evening of August, I was looking for a target to sketch while I was enjoying the view. I wanted to pick a crater or two I had never sketched before but one that would be an interesting target. It wasn’t long before the ancient crater pair of Klaporth and Casatus caught my eye and both together became my target. Klaproth and Casatus are Pre-Nectarian period impact scars on the lunar southern highlands. Klaproth is the larger and older of the two with a diameter of 119 km compared to 111 km for Casatus. It is easy to see that crater Casatus slightly overlaps the southern wall of Klaporth but both craters appeared to have taken a terrific beating over a very long time. Neither of these large walled-plain craters exhibits a central peak and both have nearly flat floors. Small craters on these floors were appearing off and on in the eyepiece during the sketch as the seeing improved for brief intervals. The rims of both craters are high above the floors. The top of the rampart of Casatus stands nearly 6 km above its floor. The light color to the floors of these craters has led lunar geologist Chuck Wood to speculate they may be the result of non-mare volcanism (see LPOD for August 5, 2006 http://www.lpod.org/?m=20060805) .
I feel I spent quality time observing and attempting to capture the view of this southern highland pair.
Sketching:
For this sketch I used: white sketching paper 10”x 8”, HB, 4B, 6B graphite pencils, a blending stump and a gum eraser. After scanning, Brightness was decreased (-3) and contrast increased (+2) using Microsoft Office Picture Manager.
Telescope: 10 inch f/ 5.7 Dobsonian and 6 mm eyepiece 241x
Date: 9-1-2009, 3:30 - 4:45 UT
Temperature: 15° C (58° F)
clear, calm, 45% humidity
Seeing: Antoniadi III
Colongitude 53.4°
Lunation 11.9 days
Illumination 90 %
Frank McCabe 
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my gallery
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Tom Machtemes
super member
Reged: 06/09/08
Posts: 104
Loc: Evergreen Park, Ill.
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Frank,
 , very nice sketch, I like it, looking for your next.
 ,
Tom
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Tommy5
Carpal Tunnel
Reged: 03/28/04
Posts: 1824
Loc: Chicagoland
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Very nice sketch of this lunar pair glad to see your taking advantage of this late summer clear, calm weather
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frank5817
Post Laureate
Reged: 06/13/06
Posts: 4095
Loc: Illinois
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Tom and T5,
Thank you both for your comments and nice words. Have you noticed how nice the weather became as the weekend closed?
Frank
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my gallery
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kraterkid
Post Laureate
Reged: 03/07/05
Posts: 4572
Loc: Jacumba, California
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Masterful graphite pencil sketch Frank!   You have done a marvelous job with these two ancient highland giants. Beautiful shading and wonderful treatment of the perspective of the surrounding environs. Just a breathtaking sketch! :
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Rich
My CN Gallery
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perfessor
sage
Reged: 12/30/07
Posts: 499
Loc: Northern Illinois
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Very nice Frank. I'll have to add these to a list for seeking out later.
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Tom
"Don't always know what I'm talkin about"
8" f/7
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rolandlinda3
Carpal Tunnel
Reged: 01/24/06
Posts: 2233
Loc: Crozet VA 22932
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I can see the depth you are talking about. Nice sketch and view.
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Roland
Sketches in members galleries: rolandlinda3
Inspirational stories/sketches at:
www.christworksministries.org
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frank5817
Post Laureate
Reged: 06/13/06
Posts: 4095
Loc: Illinois
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Rich, Tom and Roland,
Thank you all. It was one of those rare,comfortable evenings for sketching.
Frank
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my gallery
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mickmrn1
member
Reged: 05/18/08
Posts: 34
Loc: Mesa, Arizona
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Very nice sketch and view. I am glad your weather is better and looking forward to further sketching...
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Michelle D.
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frank5817
Post Laureate
Reged: 06/13/06
Posts: 4095
Loc: Illinois
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Michelle,
Thank you. It looks like you are with rhe rainy weather now.
Frank
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my gallery
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Dee
professor emeritus
Reged: 03/12/06
Posts: 738
Loc: Ireland
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Great stuff Frank, not your usual method , so cool
Dee
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rolandlinda3
Carpal Tunnel
Reged: 01/24/06
Posts: 2233
Loc: Crozet VA 22932
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Frank, I was looking at your sketch again and a thought occurred to me that may never take place, but it would sure be fun.....I have been on the shoreline of Chicago where the double-deck set of stores/food/etc. is on top of that major pier. There is lots of open concrete near the end on the side and one top; the slips often have a couple of beautiful sailing craft or powered craft. What a wonderful place one day to calmly go out with a couple of cases with refractors, calmly set up for sketching, catch the rising full moon with the context of a boat or people or whatever, have a third or 4th person getting folks to look through scopes and introduce them to the skies, and the sketchers, using a little video-out from astro camera, piece together and talk about the development of a sketch. In an hour I will bet it would draw 500 people, most of which had never looked through serious optics or observed, and perhaps one in 20 might get the bug to look up in the future to start capturing what we see on a regular basis.
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Roland
Sketches in members galleries: rolandlinda3
Inspirational stories/sketches at:
www.christworksministries.org
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frank5817
Post Laureate
Reged: 06/13/06
Posts: 4095
Loc: Illinois
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Dee and Roland,
Thank you both for your nice words.
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Roland,
You paint a great scene for an observing session, public viewing and sketch. If I thought I could pull it off, I might just give it a go someday.
Frank
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my gallery
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 Special Ed
Post Laureate
Reged: 05/18/03
Posts: 4306
Loc: Greenbrier Co., WV 38N, 80W
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Frank,
Great sketch with lots of depth. I like your graphite sketches as much as your Conte' sketches--you are a real switch hitter. 
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Michael Rosolina
8" f/10 Orange Tube SCT
4.25" f/4.2 Astroscan Reflector
SVP 3.6" f/13.6 CA Reflector
40mm PST f/10
APM Germany HD 15x70 binoculars
Canon 12x36 IS II binoculars
Mark I Eyeball
My CN Gallery
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kraterkid
Post Laureate
Reged: 03/07/05
Posts: 4572
Loc: Jacumba, California
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Michael, it's good to have him batting on our team! 
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Rich
My CN Gallery
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frank5817
Post Laureate
Reged: 06/13/06
Posts: 4095
Loc: Illinois
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Michael and Rich,
Thank you gentlemen for the nice words. Rich, that is a cool animation.
Frank
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my gallery
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CarlosEH
Post Laureate
Reged: 01/19/05
Posts: 4150
Loc: Pembroke Pines, Broward County...
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Frank,
I am sorry that I missed your excellent observation and report of Klaproth and Casatus. You have recorded this ancient lunar terrain very nicely. Thank you for sharing it with us all.
Carlos
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frank5817
Post Laureate
Reged: 06/13/06
Posts: 4095
Loc: Illinois
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Carlos,
Thank you very much. See you didn't miss it.
Frank
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my gallery
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