Jump to content


Photo

Some volcanic domes

  • Please log in to reply
21 replies to this topic

#1 Jef De Wit

Jef De Wit

    Mercury-Atlas

  • *****
  • Posts: 2729
  • Joined: 06 Mar 2009
  • Loc: Hove, Belgium

Posted 30 May 2010 - 01:26 PM

Two moon sketches from last week.

Kies is a nice crater, flooded with lava and with walls that are interrupted at some places. In the middle of the crater runs a ray. At 8 o'clock you find the dome Kies Pi (just visible in my 8 cm) from volcanic origin.

Hove (Belgium), 23/05/2010, 20.00-21.00 UT, 9.8 days, 81%, alt. 29°, 8 cm refractor @ x138, pastel on grey paper, scanned and mirrored.

Attached Files



#2 idp

idp

    Messenger

  • -----
  • Posts: 453
  • Joined: 21 Aug 2009
  • Loc: New Haven, CT

Posted 30 May 2010 - 01:31 PM

Really wonderful sketch, I love how you rendered the ghost crater and the faint dome. Looks like pastels on gray paper works great.

I.

#3 Jef De Wit

Jef De Wit

    Mercury-Atlas

  • *****
  • Posts: 2729
  • Joined: 06 Mar 2009
  • Loc: Hove, Belgium

Posted 30 May 2010 - 01:36 PM

Gruithuisen Gamma (left) en Gruithuisen Delta (right) are two easily visible domes from (probable) volcanic origin. I think there must be more to see (with a 8 cm) but the low altitude gave some bad seeing.
It nice to compare with the sketch of Uwe who observed the same region one day before me.

Hove (Belgium), 25/05/2010, 20.00-21.00 UT, 11.8 days, 95%, alt. 17°, 8 cm refractor @ x138, pastel on grey paper, scanned and mirrored.

Attached Files



#4 Jef De Wit

Jef De Wit

    Mercury-Atlas

  • *****
  • Posts: 2729
  • Joined: 06 Mar 2009
  • Loc: Hove, Belgium

Posted 30 May 2010 - 01:43 PM

Ivano

Thanks a lot for the nice words. You were really fast... I didn't even post the second sketch.

I think grey paper works really nice if you stay away from the terminator (then black is better). But I don't like the rough texture of the art paper I use. You can't make something realy white or black. I'm looking for grey sketch paper (printing paper is too thin) without texture, but didn't find it yet.

#5 voyager75

voyager75

    Explorer 1

  • -----
  • Posts: 81
  • Joined: 26 Aug 2009
  • Loc: Naples, Italy

Posted 30 May 2010 - 03:08 PM

Wow!
Faboulous!
Very nice sketch.

#6 CarlosEH

CarlosEH

    Fly Me to the Moon

  • *****
  • Posts: 7165
  • Joined: 19 Jan 2005
  • Loc: Pembroke Pines, Broward County, Florida

Posted 30 May 2010 - 05:12 PM

Jef,

Outstanding observations of Kies/Kies Pi and Gruithisen Gamma/Delta. You have captured these lunar domes very nicely. Kies is well rendered as a "ghost crater." I adjusted the levels on your Gruithisen image and blurred the shadows as well. I hope that you like it. Thank you for sharing them with us all.

It is interesting to compare your fine rendering and Uwe's. Both are excellent!

Carlos

Attached Files



#7 JanisR

JanisR

    Vostok 1

  • -----
  • Posts: 179
  • Joined: 26 Jun 2008
  • Loc: Pennsylvania

Posted 30 May 2010 - 06:55 PM

Ever try ironing your paper? Hot press followed by some time under a weight, like a pile of books.

#8 frank5817

frank5817

    Cosmos

  • *****
  • Posts: 8372
  • Joined: 13 Jun 2006
  • Loc: Illinois

Posted 30 May 2010 - 10:46 PM

Jef,

These are excellent sketches. The grey paper works very well and your detail is great. :cool: :bow:

---

Janis- Does that really work? That is a simple solution if it does.

Frank :)

#9 mathteacher

mathteacher

    Mercury-Atlas

  • *****
  • Posts: 2782
  • Joined: 13 May 2007
  • Loc: Oakland, CA

Posted 31 May 2010 - 12:44 AM

Nice work, sir!

#10 JanisR

JanisR

    Vostok 1

  • -----
  • Posts: 179
  • Joined: 26 Jun 2008
  • Loc: Pennsylvania

Posted 31 May 2010 - 08:28 AM

I have to say it *used* to work pretty well for me in "De Olde Days". I expect it depends on the paper being pressed. A test on a piece of scrap paper would tell the tale. I would cut my paper into 8x10 inch sheets before pressing it. The hot pressed paper wanted to curl, which is why I would press the sheets under books afterwards.

Things like paper formula change over time, and I haven't done it in quite awhile, so I could totally be full of Ka-ka now. It might not work anymore. I will be experimenting soon, though, as I have just brought home some new paper to work with. I really like the weight and color of the paper, but it's textured, so I'm going to try and "hot press" a sheet to see if I like that better. I figure it's worth a shot

#11 Jef De Wit

Jef De Wit

    Mercury-Atlas

  • *****
  • Posts: 2729
  • Joined: 06 Mar 2009
  • Loc: Hove, Belgium

Posted 31 May 2010 - 01:05 PM

Voyager, Carlos, Frank and Mathteacher :thanx:

@ Carlos: After your treatment the sketch looks more than what I want. I hope with other paper (ironed or not...) it will be better.

@ Jan: keep that technique in mind. Let me know if the hot press works.

#12 CarlosEH

CarlosEH

    Fly Me to the Moon

  • *****
  • Posts: 7165
  • Joined: 19 Jan 2005
  • Loc: Pembroke Pines, Broward County, Florida

Posted 31 May 2010 - 01:20 PM

Jef,

Keep up the excellent work and we all look forward to your excellent observations in the future. The hot pressed paper sounds like it may work for you.

Carlos

#13 Uwe Pilz

Uwe Pilz

    Viking 1

  • *****
  • Posts: 998
  • Joined: 16 May 2008
  • Loc: Leipzig, Germany

Posted 01 June 2010 - 12:31 AM

Cool usage of grey paper, impressive sketches!

#14 Jef De Wit

Jef De Wit

    Mercury-Atlas

  • *****
  • Posts: 2729
  • Joined: 06 Mar 2009
  • Loc: Hove, Belgium

Posted 01 June 2010 - 11:26 AM

Thanks Uwe, but I like your Gruithuisen more than mine.

#15 rolandlinda3

rolandlinda3

    Gemini

  • *****
  • Posts: 3392
  • Joined: 24 Jan 2006
  • Loc: Crozet VA 22932

Posted 01 June 2010 - 09:20 PM

Nice sketch. Grey paper is great paper to use, too.

#16 Jef De Wit

Jef De Wit

    Mercury-Atlas

  • *****
  • Posts: 2729
  • Joined: 06 Mar 2009
  • Loc: Hove, Belgium

Posted 02 June 2010 - 12:13 PM

Roland, I'm glad you liked the sketch.

#17 rolandlinda3

rolandlinda3

    Gemini

  • *****
  • Posts: 3392
  • Joined: 24 Jan 2006
  • Loc: Crozet VA 22932

Posted 02 June 2010 - 07:56 PM

Jef, Linda (my wife and I) found a unique source of "grey" paper for very large drawings: gypsum or plaster board. Of course, it is used for building walls (interior) but we have found it excellent for pastels since it is greyish paper that is used to cover the plaster/gypsum. It has enough strength so that you can put up a meter by meter or 2 meter by meter piece in order to do a demonstration. You might try it sometime if you need to do a large drawing with a group.

#18 Jef De Wit

Jef De Wit

    Mercury-Atlas

  • *****
  • Posts: 2729
  • Joined: 06 Mar 2009
  • Loc: Hove, Belgium

Posted 03 June 2010 - 07:29 AM

Thanks for the information.

#19 mikesemmler

mikesemmler

    Messenger

  • -----
  • Posts: 413
  • Joined: 01 Jun 2009

Posted 03 June 2010 - 03:32 PM

great job jef

Michael

#20 ladip63

ladip63

    Viking 1

  • -----
  • Posts: 813
  • Joined: 17 Oct 2007
  • Loc: the dark skies of Texas

Posted 03 June 2010 - 03:49 PM

WOW! Jef Great job :waytogo: :rainbow: :goodjob:
I saw the moon when I was walking and wish I had my sketch board.
Really nice job Jef.:D

#21 azure1961p

azure1961p

    Voyager 1

  • *****
  • Posts: 10225
  • Joined: 17 Jan 2009
  • Loc: USA

Posted 03 June 2010 - 06:33 PM


You know,

Im thinking to myself before I open your post "yeah yeah...sketchy moon drawing" and wow. 2what a proper rendition . Moreover, that you focused on a SPECIFIC area of study, small and hiughly detailed is lunar observation that I enjoy most.

Really terrific stuff.

Pete

#22 Jef De Wit

Jef De Wit

    Mercury-Atlas

  • *****
  • Posts: 2729
  • Joined: 06 Mar 2009
  • Loc: Hove, Belgium

Posted 04 June 2010 - 12:38 PM

Michael, Lynn and Pete, thanks for the nice words.

@ Pete:
That I sketched two volcanic regions in two days was pure coincidence. I'm sketching the Lunar 100. I put without preperation my telescope outside, look which Lunar 100-object is good placed for a sketch and try to put it on paper. This were number 49 and 60. I have still 90 objects to go, so I will be still busy for some years.






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics