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Mare Spumans and Mare Undarum

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#1 frank5817

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Posted 06 August 2012 - 09:03 PM

On this evening, two days past full moon and with favorable libration on the eastern portion of the Moon, I chose two irregular maria targets for sketching. Mare Spumans was completely visible while Mare Undarum was only partly exposed beyond the terminator.
Although I have examined these little ancient "lakes" in the past this has been my first attempt to capture them on paper. Both are surrounded by bright, densely cratered upland and are close enough to Mare Crisium to be within its eject blanket and basin rings.

This is a very attractive region of the Moon for sketchers with craters Langrenus and Messier and Messier A nearby and Mare Crisium just to the north. I purposely kept these features out of my view to focus on lesser observed targets. In addition to the maria subjects, craters : Webb (22 km.), Apollonius (53 km.), and Firmicus (56 km.) provided eye catching targets across the view.


Sketching:

For this sketch I used: black Strathmore 400 Artagain paper 9"x 12", white and black Conte’ pastel pencils and a blending stump. After scanning, Brightness was decreased just slightly using my scanner.

Telescope: 10 inch f/ 5.7 Dobsonian and 6 mm eyepiece 241x
Date: 08-04-2012, 04:00 - 05:50 UT
Temperature: 29°C (85° F)
hazy, calm
Seeing: Antoniadi III
Colongitude 110.6 °
Lunation 16 days
Illumination: 94.9 %
Libration: in Lat. -5° 45’, in Long. +05° 38’

Frank McCabe :)

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#2 frank5817

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Posted 06 August 2012 - 09:04 PM

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#3 mike73

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Posted 07 August 2012 - 03:12 AM

Inspirational Frank, thanks for posting.

#4 Ed D

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Posted 07 August 2012 - 08:09 PM

Frank, you do some really nice lunar sketches!

Ed D

#5 frank5817

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Posted 07 August 2012 - 08:52 PM

Mike and Ed,

Thanks, I am in my comfort zone on these warm summer nights with sketching. For me it takes concentration and being relaxed. Distant packs of coyotes identifying their locations with respect to one another added to the enjoyment.
--
Mike, I have been sorry to hear you have not had very good summer weather for observing - hopefully that will soon improve.

Frank :)

#6 Tommy5

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Posted 08 August 2012 - 02:10 AM

great lunar sketches lots of detail good texture congrads.

#7 frank5817

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Posted 09 August 2012 - 10:22 AM

Tom,

Thank you, I hope you are getting chances to observe and sketch this summer.

Frank :)

#8 Rutilus

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Posted 09 August 2012 - 04:00 PM

Great Lunar sketch Frank.

#9 astronz59

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Posted 09 August 2012 - 08:41 PM

Lovely catch Frank! I can see I'm gonna have to give the Moon a shot pretty darn soon - your drawings are inspirational! :refractor::thinking: :applause:

#10 frank5817

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Posted 09 August 2012 - 10:05 PM

Ian,

I'm glad you like it, you will encounter little difficulty if any with your skills.
I can't believe you haven't sketched the Moon.

Frank :)

#11 niteskystargazer

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Posted 10 August 2012 - 04:37 PM

Frank,

Very good sketches of Mare Spumans & Mare Undarum :).

CS,KLU,

:),

Tom

#12 rolandlinda3

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Posted 11 August 2012 - 09:37 PM

Really nice, Frank. Man that is a lot of territory to cover with that much detail! I am impressed.

#13 frank5817

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Posted 12 August 2012 - 09:06 AM

Tom and Roland,

Thank you for your kind words.

Frank :)

#14 maroubra_boy

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Posted 13 August 2012 - 05:15 AM

Beautiful sketch, Frank. Your use of the media is a delight to see. Not overworked, yet the finest of detail is alluded to.

Beautiful.

Alex.

#15 frank5817

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Posted 13 August 2012 - 02:51 PM

Thank you Alex. It was fun to sketch.
I am still all smiles after viewing your Petavius crater sketch, a true masterpiece.

Frank :)

#16 frank5817

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Posted 13 August 2012 - 02:55 PM

Here is another sketch I was able to make a few days later of crater Posidonius at sunset.

Crater Posidonius at Sunset

On this night I watched the sunset terminator creep slowly toward ring-plain crater
Posidonius while I sketched the crater and other features on the floor of Mare Serenitatis. Posidonius (96 km.) is an old upper Imbrian era impact remnant. Its age is underlined by the way shadows penetrate the rim at numerous points betraying impact damage there. The highest part of the rim is on the terminator side of this crater. Sunlight was still reaching Posidonius A and other high points on ridges including one on the inner ring. Beyond this crater to the west and south the great serpentine ridge could be seen in best
light. This ridge is made up of dorsa Smirnov and dorsa Lister.

Sketching:

For this sketch I used: black Strathmore 400 Artagain paper 9"x 12", white and black Conte’ pastel pencils and a blending stump. After scanning, Brightness was decreased just slightly using my scanner.

Telescope: 10 inch f/ 5.7 Dobsonian and 6 mm eyepiece 241x
Date: 08-07-2012, 06:30 - 07:40 UT
Temperature: 29°C (85° F)
clear, calm
Seeing: Antoniadi III
Colongitude 147.9 °
Lunation 19 days
Illumination: 73.4 %

Frank McCabe :)

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#17 frank5817

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Posted 13 August 2012 - 02:55 PM

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#18 niteskystargazer

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Posted 14 August 2012 - 09:32 AM

Frank,

Good sketch of Crater Posidonius at Sunset :).

CS,KLU,

:thanx:,

Tom






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