frank5817
Postmaster
   
Reged: 06/13/06
Loc: Illinois
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The Modified Crater Heraclitus
#5437403 - 09/24/12 02:59 AM Attachment (26 downloads)
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The southern lunar highlands expose the ancient anorthositic crust between craters. Centered in this southern highland sketch is the buried pre-Imbrian crater Heraclitus (92 km.) with its unusual central mountain crest. This ridge or crest looks much like the one on the floor of the elongated crater Schiller formed during its shallow angle impact. The ends of Heraclitus are buried under Licetus (77 km.) to the north and Heraclitus D (52 km.) to the south. Its easy to imagine this possible Schiller twin here partly hidden. To the east is crater Cuvier (76 km.) with its smooth floor and western wall pressing in on Heraclitus.
Sketching:
For this sketch I used: black Canson paper 9"x 12", white and black Conte’ pastel pencils and blending stumps. The scanned sketch is unmodified
Telescope: 10 inch f/ 5.7 Dobsonian and 4 mm eyepiece 362x Date: 09-24-2012, 00:15 - 01:50 UT Temperature: 10°C (50° F) clear, calm Seeing: average Antoniadi III Colongitude 11.3 ° Lunation 7.9 days Illumination: 63.5 %
Frank McCabe
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frank5817
Postmaster
   
Reged: 06/13/06
Loc: Illinois
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Re: The Modified Crater Heraclitus
[Re: frank5817]
#5437404 - 09/24/12 03:00 AM Attachment (17 downloads)
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With Labels
Frank
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Jef De Wit
Carpal Tunnel
Reged: 03/06/09
Loc: Hove, Belgium
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Re: The Modified Crater Heraclitus
[Re: frank5817]
#5437468 - 09/24/12 04:48 AM
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Again a fine sketch! There are really some bizare features to see.
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Asbytec
Guy in a furry hat
Reged: 08/08/07
Loc: La Union, PI
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Re: The Modified Crater Heraclitus
[Re: Jef De Wit]
#5437477 - 09/24/12 05:06 AM
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Frank, your talent is apparent. Well done, you bring the beauty of the moon to life. That's hard to do, but not for you..apparently.
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astronz59
sage
Reged: 09/15/10
Loc: Auckland, New Zealand
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Re: The Modified Crater Heraclitus
[Re: frank5817]
#5437527 - 09/24/12 06:37 AM
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Frank,wonderfully rendered vignette of some very interesting Lunar geological features! 
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frank5817
Postmaster
   
Reged: 06/13/06
Loc: Illinois
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Re: The Modified Crater Heraclitus
[Re: astronz59]
#5437984 - 09/24/12 12:11 PM
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Jef, Norme, and Ian,
Thanks for you kind feedback. On the evening before this sketch I attempted to capture this region with a much lower sun leaving the central ridge looking like an illuminated rectangle. Clouds ended that session very early.
Frank
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Ibmelrod
sage
Reged: 10/18/04
Loc: Ontario Canada
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Re: The Modified Crater Heraclitus
[Re: frank5817]
#5438203 - 09/24/12 02:26 PM
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Frank,
Great work and presentation.
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ericj
professor emeritus
Reged: 02/17/05
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Re: The Modified Crater Heraclitus
[Re: frank5817]
#5438258 - 09/24/12 03:03 PM
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Hi Frank,
Nice sketch as always. They always show a lot of fine detail.
Best,
Eric Jamison
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niteskystargazer
Carpal Tunnel
   
Reged: 10/05/09
Loc: 41-43'-28" N 87-42'-39" W
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Re: The Modified Crater Heraclitus
[Re: frank5817]
#5438310 - 09/24/12 03:30 PM
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Frank,
Very good sketch of Crater Heraclitus .
CS,KLU,
,
Tom
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Uwe Pilz
scholastic sledgehammer
Reged: 05/16/08
Loc: Leipzig, Germany
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Re: The Modified Crater Heraclitus
[Re: niteskystargazer]
#5439023 - 09/25/12 12:13 AM
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Looks like in the eyepiece. Great work!
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frank5817
Postmaster
   
Reged: 06/13/06
Loc: Illinois
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Re: The Modified Crater Heraclitus
[Re: Uwe Pilz]
#5439069 - 09/25/12 01:14 AM
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Mel, Eric, Tom and Uwe,
Thank you all. There are a lot of interesing craters in the southern highlands. I always feel a strong urge to get out and sketch before the very cold cloudy weather arrives.
Frank
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JeanB
scholastic sledgehammer
Reged: 07/11/11
Loc: Montreal, Canada
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Re: The Modified Crater Heraclitus
[Re: frank5817]
#5440221 - 09/25/12 04:46 PM
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Frank, I have just realized I did not comment on your lunar sketch... 
Well consider it now commented! 
It is a very fine and detailed piece of work. I like it a lot!
Jean
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Rutilus
Pooh-Bah
Reged: 12/17/10
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Re: The Modified Crater Heraclitus
[Re: JeanB]
#5440249 - 09/25/12 04:57 PM
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As ever Frank, a first class job.
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frank5817
Postmaster
   
Reged: 06/13/06
Loc: Illinois
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Re: The Modified Crater Heraclitus
[Re: Rutilus]
#5441405 - 09/26/12 10:46 AM
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Jean and Rutilus,
Thank you both for those kind words. Best to you both on your observing and sketching.
Frank
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rodelaet
Post Laureate
   
Reged: 04/28/06
Loc: 50°56' N - 4°58' E (Belgium)
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Re: The Modified Crater Heraclitus
[Re: frank5817]
#5442037 - 09/26/12 05:09 PM
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Hello Frank,
Nice to see that you spend some time behind the eyepiece! I like how you managed to accurately render the range of gray tones of the moon's surface. Masterly, Frank!
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frank5817
Postmaster
   
Reged: 06/13/06
Loc: Illinois
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Re: The Modified Crater Heraclitus
[Re: rodelaet]
#5442294 - 09/26/12 08:01 PM
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Rony,
Thank you much my friend. I try and get out every clear night. I have enjoyed on several occasions recently matching the views with your sketches in the book "The Casual Observer's Guide", Your book and sketches are inspirational.
Frank
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