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Crater Lambert on Mare Imbrium

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#1 frank5817

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Posted 15 April 2011 - 01:36 AM

Crater Lambert on Mare Imbrium

Lambert crater is a smallish complex crater of 30 kilometers diameter resting on the floor of Mare Imbrium. This Eratosthenian crater must be some 2.5 billion years old. Its outer rampart is impressive, as is its floor, which unfortunately was not seen on this occasion due to morning shadowing.
The ghost crater Lambert R was detectable but is best seen closer to the terminator as sunset approaches during the waning crescent phase. Further south from Lambert and Lambert R, crater Pytheas (20 km.) was also visible.
Closer to the sunrise terminator Mons La Hire was casting long shadows while crater Euler (29 km) was just catching light on its eastern rim.
To the north of Lambert, Dorsa Stille and Dorsum Zirkel were easily visible along with many small craters.


Sketching Information

Lambert crater on ebony black Canson paper using white and black Conte’ pastel pencils
Sketch Date: April 13, 2011, using a 10 inch f/5.7 Dobsonian telescope riding on an equatorial platform with a 6mm eyepiece for 241x at 03:00-04:10 UT
Seeing: Antoniadi III
Weather clear, calm, 50 degrees F (10 degrees C)
Lunation 9.5 days
Moon 67.9% illuminated
Colongitude 27.7°
Rükl Atlas Pl 20

Frank McCabe :)

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#2 mikesemmler

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Posted 15 April 2011 - 04:46 AM

this is great, thanks Frank, to share it with us

Michael

#3 Mark9473

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Posted 15 April 2011 - 12:37 PM

Incredibly realistic sketch! Almost like looking through the scope.

#4 Rutilus

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Posted 15 April 2011 - 12:52 PM

Another excellent sketch Frank.

#5 niteskystargazer

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Posted 15 April 2011 - 03:09 PM

Frank,

Very nice sketch of Lambert :).

CS,KLU,

:thanx:,

Tom

#6 JayinUT

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Posted 15 April 2011 - 05:47 PM

Was out looking around last night and your sketch is certainly realistic and as always, just fantastic.

#7 frank5817

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Posted 15 April 2011 - 08:27 PM

Mike, Mark, Rutilus, Tom, and Jay,

Thank you all for your comments on my crater Lambert sketch.
I was getting a very good view and although there were many fine targets to choose from, I have not sketched Lambert since 2007, so I thought I'd have another go at it.

Frank :)

#8 CarlosEH

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Posted 16 April 2011 - 01:12 AM

Frank,

An excellent observation of Crater Lambert on Mare Imbrium. You have recorded the terraced walls/shadows and ridges very nicely. Thank you for sharing it with us all.

Carlos

#9 Tommy5

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Posted 17 April 2011 - 10:53 AM

Great sketch of the Maria, I like the texture so realistic to the eyepiece view thanks for posting.

#10 frank5817

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Posted 17 April 2011 - 11:15 PM

Carlos and Tommy5,

Thank you both for your nice words.

Frank :)

#11 Jef De Wit

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Posted 18 April 2011 - 11:29 AM

Frank, another impressive sketch of the Moon! At the top of your paper I see some signs of intelligent life on our sister :grin:

#12 frank5817

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Posted 18 April 2011 - 03:50 PM

Jef,

Thank you. One edge of the paper is embossed with the words 'Colorline Canson' over and over the other side is not. I'm sure I sketched on the wrong side but on the other side there was some gum left from the price tag.
I should know better by now because I have made this mistake before. :foreheadslap:

Frank :)

#13 Uwe Pilz

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Posted 19 April 2011 - 03:15 PM

Again a really realistic sketch. As black-on-white-sketcher I enjoy your inversed ones in a special way.

#14 frank5817

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Posted 20 April 2011 - 08:12 PM

Uwe,

Thank you much.
I am hopeful you will be posting more of your sketches here very soon.

Frank :)

#15 Jef De Wit

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Posted 22 April 2011 - 02:07 PM

Congratulations with your ASOD!

#16 frank5817

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Posted 22 April 2011 - 11:27 PM

Jef,

Thank you.

Frank :)






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