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Stand Alone Crater Manilius

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#1 frank5817

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Posted 09 November 2009 - 07:19 PM

There is a stand alone Eratosthenian crater (1-3 billion years old) on the northeastern shore of the Sea of Vapors known as Manilius. Manilius is 39 kilometers in diameter with a steep inner wall 3.1 kilometers above its floor. The crater rim and outer rampart are impressive in the eyepiece as is the illuminated inner talus slope and central mountain still capturing sunlight. As I was making this sketch at 241 power I knew this moonscape was know to have several small domes and when I finished I took a look at several of the larger ones under higher magnification. They are a little difficult to pick out from all the smaller bits of Imbrium ejecta piles. I didn’t concern myself with them during the sketch but Chuck Wood’s LPOD and Bruno Daversin’s image on April 12, 2006 show the ones close to the crater to the north and east. http://www.lpod.org/?m=20060412
This photo was taken during the waxing moon and I was viewing and sketching during the waning moon. Also since I was sketching with a Newtonian scope south is up in the sketch.

Sketching:

For this sketch I used: black Canson paper 9"x 12", white and black Conte'
pastel pencils , and Conte'crayons, a blending stump, plastic eraser. Brightness was decreased -2 and contrast increased +2 using the scanner for this sketch
Telescope: 10 inch f/ 5.7 Dobsonian with 6mm (241x) eyepiece
Date: 11-8-2009 11:15-12:40 UT
Temperature: 9°C (49°F)
Clear becoming partly cloudy, calm
Seeing: Antoniadi II
Co longitude 167°
Lunation 21.5 days
Illumination 61%

Illinois

Frank McCabe :)

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#2 Shannon s

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Posted 09 November 2009 - 07:49 PM

Excellent sketch and report, Frank. :bow: :bow: :bow: I've only done a couple sketches of the moon & only have one moon map. Do you have an opinion on the best or most informative book on the moon? :question:

#3 frank5817

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Posted 09 November 2009 - 08:37 PM

Shannon,

Thank you. :thanx:

I can think of several. Certainly, Chuck Wood's fine book "The Modern Moon", V. Axel Firsoff old book titled, "The Moon" it's an old book from the 1960's good basic intro to the moon. Thomas Hockey's "The Book of the Moon", Thierry Legault and Serge Brunier's "New Atlas of the Moon", Antonin Rukl's work "Atlas of the Moon". If you go over to the Lunar Forum on the top of the first page click on "The Best of the Lunie Bin" by Desertstars you will find an excellent lunar bibliography list there. On the top of the second page see Tom N's post "What is the Best Moon Atlas"?
Hope this helps.

Frank :)

#4 Uwe Pilz

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Posted 10 November 2009 - 01:55 AM

Dear Frank,

great image. The surroundings of such an crater are specially hard to sketch. Very well done! The steepness of the crater is clear visible.
@Shannon: If have a couple of moon books. I found "The modern moon" especially instructive. Chuck explains the connection between what you see and what happened some Billion years ago.

#5 kraterkid

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Posted 10 November 2009 - 08:27 AM

Frank, yet another exquisite rendition from the hands of the master! :bow: :rainbow: :bow: Your sketch so accurately illustrates the subtle beauty of Manillus in its relative isolation, steep inner walls and banded structure. Always a treat seeing your exceptional work! :waytogo:

#6 frank5817

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Posted 10 November 2009 - 01:49 PM

Uwe and Rich,

Thank you both for your kind comments. :thanx: Don't forget Rich, my dear fellow, you are one of those that got me hooked on this kind of sketching-- thank you very much. :)
I really think anyone sketching the moon in white pastel on black paper will not want to go back to graphite sketching.

Frank :)

#7 niteskystargazer

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Posted 11 November 2009 - 12:28 PM

Frank,

:), very nice sketch.

:thanx:,

Tom

#8 frank5817

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Posted 11 November 2009 - 06:59 PM

Tom,

Thank you for your response. :thanx:

Frank :)

#9 markseibold

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Posted 11 November 2009 - 07:52 PM

Frank

Another beautiful lunar crater rendering by you - I also appreciate the extensive text information you always provide. You and others here mentioned notable books on observing the moon. I think your posts should be part of a great online atlas about observing and sketching lunar details plus providing the extensive factual information about the moons geology. :bow: :bow: :bow:

Mark

#10 CarlosEH

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Posted 11 November 2009 - 09:51 PM

Frank,

An excellent observation of Manilius and surrounding domes. This is a very interesting crater with steep walls/ramparts and central mountain. Thank you for sharing it with us all.

Carlos

#11 mickmrn1

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Posted 11 November 2009 - 10:58 PM

This is an excellent sketch Frank-It makes me want to go check out this region very soon! Great sketch using your 6mm eyepiece; love the shadows in this one!

#12 frank5817

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Posted 11 November 2009 - 11:38 PM

Mark, Carlos and Michelle,

That you all. :thanx:
--------
Mark,
I think you would really enjoy going through the archives of the Lunar Forum where you can find much in the way of geology and book discussions. It is done mostly with the complimentary photos using CCD digital camera images which certainly allow one to see with better resolution the a lunar sketcher could hope to capture.
------
Carlos and Michelle - A very interesting area of the moon for close examination and sketching on a good night.

Frank :)

#13 Special Ed

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Posted 13 November 2009 - 03:14 PM

Good work, Frank. This crater has an odd appearance--like the rim is broader than is usual.

I'd never heard of the crater's namesake--Marcus Manilius, a Roman astrologer of the 1st century.

#14 frank5817

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Posted 13 November 2009 - 05:01 PM

Michael,

You have a sharp eye and have helped me understand what is wrong with the sketch. Now I know. I lost the original rim line and had planned to go back and complete it at the end. I also failed to dim the brightness on the inner wall with a black Conte' pencil. Here in electronic form is what I failed to do at the eyepiece. Too late to fix it now. Thank you. I was actually thinking I had over drawn the crater.

Frank :)

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#15 Jef De Wit

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Posted 15 November 2009 - 07:53 AM

Frank
Congratulations with your ASOD!

#16 frank5817

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Posted 15 November 2009 - 03:49 PM

Jef,

Thank you. :thanx:

Frank :)

#17 rolandlinda3

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Posted 16 November 2009 - 08:14 PM

Nicely done Frank.

#18 frank5817

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Posted 17 November 2009 - 10:14 AM

Roland,

Thank you.:thanx:

Frank :)






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