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Astrophotography and Sketching >> Sketching

Pages: 1
frank5817
Postmaster
*****

Reged: 06/13/06

Loc: Illinois
Theophilus and Cyrillus new
      #5770093 - 04/01/13 03:15 AM Attachment (24 downloads)

As the evening progressed the sky became mostly clear with some ground fog adding to the light scatter and the inevitable falling temperatures of an early spring night. Nevertheless, it was good enough for some observing and sketching. Crater Theophilus (100km.) was more than 450 kilometers from the terminator but remained an attractive target in the eyepiece as the Moon cleared a nearby building in my southeast.

Theophilus is a complex Erastothenian era crater at just over 1.3 billion years in age with large central peaks of deep crustal material that formed on the rebound from the initial impact. The appearance looks fresh when compared to its much older Nectarian period neighbor Cyrillus (100 km.). It was evident while observing this pair that Cyrillus was showered with ejecta from Theophilus and prior millennia of countless strikes by incoming rocks from space. The central peaks of Cyrillus are smaller, more muted and worn down. 300 kilometers to the west of Theophilus the Apollo 16 astronauts Charles Duke and John Young collected 96 kilograms of rocks over 3 days back in 1972 which included some ejecta from the Theophilus formation.
Remote sensors on the orbital spacecraft Chandrayaan-1 detected Iron rich Magnesium –Aluminum oxides on the central peaks of Theophilus adding to the knowledge of the composition to the deep lunar crust as indicated by a publication last spring.

Two other craters included in the sketch are Mädler (29 km.) also of Erastothenian age and Ibn-Rushd (34 km.) an ancient one at more than 3.2 billion years.


Sketching:
For this sketch I used: black Strathmore 400 Artagain paper 8" x 10", white and black Conte’ pastel pencils, a blending stump, white Pearl eraser. Contrast was slightly increased after scanning.
Telescope: 10 inch f/ 5.7 Dobsonian and 6 mm eyepiece 241X
Date: 3-30-2013; 04:30-05:35 UT
Temperature: 2° C (36° F)
Some thin clouds, calm
Seeing: Antoniadi IV poor
Colongitude 128.9 °
Lunation 18.4 days
Illumination 90.1 %

Frank McCabe


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frank5817
Postmaster
*****

Reged: 06/13/06

Loc: Illinois
Re: Theophilus and Cyrillus new [Re: frank5817]
      #5770095 - 04/01/13 03:16 AM Attachment (11 downloads)

with labels

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Andrev
Post Laureate
*****

Reged: 02/08/11

Loc: Montreal, Quebec, Canada
Re: Theophilus and Cyrillus new [Re: frank5817]
      #5770221 - 04/01/13 07:29 AM

Nice one Frank.

Andre.


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Dee
scholastic sledgehammer
*****

Reged: 03/12/06

Loc: Ireland
Re: Theophilus and Cyrillus new [Re: Andrev]
      #5770310 - 04/01/13 09:14 AM

Really cool Frank

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niteskystargazer
Carpal Tunnel
*****

Reged: 10/05/09

Loc: 41-43'-28" N 87-42'-39" W
Re: Theophilus and Cyrillus new [Re: frank5817]
      #5770601 - 04/01/13 11:46 AM

Frank,

Very good sketch of Theophilus & Cyrillus .

CS,KLU,

,

Tom


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Jef De Wit
Carpal Tunnel


Reged: 03/06/09

Loc: Hove, Belgium
Re: Theophilus and Cyrillus new [Re: niteskystargazer]
      #5770877 - 04/01/13 01:56 PM

Fine sketch and interesting information.

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Tommy5
Carpal Tunnel


Reged: 03/28/04

Loc: Chicagoland
Re: Theophilus and Cyrillus new [Re: Jef De Wit]
      #5771538 - 04/01/13 07:38 PM

Very nice sketch, interesting info thanks for sharing.

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frank5817
Postmaster
*****

Reged: 06/13/06

Loc: Illinois
Re: Theophilus and Cyrillus new [Re: Tommy5]
      #5771582 - 04/01/13 07:52 PM

Andre, Dee, Tom, Jef and Tommy,

Thank you all for your kind words on my latest lunar sketch.

Frank


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PeterDob
scholastic sledgehammer


Reged: 07/29/05

Loc: Carù, Italy
Re: Theophilus and Cyrillus new [Re: frank5817]
      #5772225 - 04/02/13 06:54 AM

Just wonderful, Frank!!! You truly make it look like a barren wasteland, and I mean this as a compliment because that's exactly the kind of feeling one should get about the moon. The thing love in general about sketching, and this in contrast to "clean" photography, is that we succeed in transmitting not just an impression, but also an atmosphere about the things we see. And you do this exceptionally well!

Peter


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kenrenard
Carpal Tunnel


Reged: 12/13/12

Loc: Dunmore, PA
Re: Theophilus and Cyrillus new [Re: PeterDob]
      #5772516 - 04/02/13 10:20 AM

Great work Frank. I agree with Peter it does look very barren and unforgiving. Amazing detail.

Clear Skies

Ken


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JeanB
Pooh-Bah


Reged: 07/11/11

Loc: Montreal, Canada
Re: Theophilus and Cyrillus new [Re: kenrenard]
      #5772925 - 04/02/13 01:14 PM

A very lovely work, Frank! And again I like the report which adds a lively touch to the sketch!

Jean


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frank5817
Postmaster
*****

Reged: 06/13/06

Loc: Illinois
Re: Theophilus and Cyrillus new [Re: JeanB]
      #5776779 - 04/03/13 11:39 PM

Peter, Ken and Jean,

Thank you for your positive reactions to my sketch.
Its always exciting to be out under a clear night sky.

Frank


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Aquarellia
professor emeritus


Reged: 10/27/12

Loc: Provence, France
Re: Theophilus and Cyrillus new [Re: frank5817]
      #5776892 - 04/04/13 12:59 AM

As said by Jean, your sketches are always lovely but on top of that, the story explanation is very interesting. You are Lunar sketcher and storyteller

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frank5817
Postmaster
*****

Reged: 06/13/06

Loc: Illinois
Re: Theophilus and Cyrillus new [Re: Aquarellia]
      #5779765 - 04/05/13 02:34 PM

Michel,

Thanks for your kind words, much appreciated from such a fine artist as yourself.

Frank


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ericj
professor emeritus


Reged: 02/17/05

Re: Theophilus and Cyrillus [Re: frank5817]
      #5783720 - 04/07/13 12:38 PM

Very fine sketch as always Frank.

Best,

Eric


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