Jump to content


Crater Janssen

This topic has been archived. This means that you cannot reply to this topic.
7 replies to this topic

#1 Uwe Pilz

Uwe Pilz


  • *****
  • Posts: 1116
  • Joined: 16 May 2008

Posted 28 May 2009 - 03:41 PM

Janssen is a very old crater form the pre Nectarian period. It is very battered from many younger craters. It's outline is only visible close to the terminator - like this evening.
In the monthes May and June the young moon can be observed in a very good position: High in the evening sky.

Jannsen showed lots of details. I tried to sketch as many as possibe in ~20 minutes. Some of the subtle detailed I failed sketching - shadows were moving to fast.

(120/600 refractor-112x)

Attached Files

#2 frank5817



  • *****
  • Posts: 8637
  • Joined: 13 Jun 2006

Posted 28 May 2009 - 06:01 PM


Getting the features on paper fast is the make or break step of a sketch near the terminator. It's like a game of beat the clock. I have sketches with impossible shadows because I took too long.
Your sketch here is excellent for a 20 minute sketch. Thank you for sharing it with us all. :waytogo:

Frank :)

#3 CarlosEH


    Fly Me to the Moon

  • *****
  • Posts: 7341
  • Joined: 19 Jan 2005

Posted 28 May 2009 - 07:30 PM


An excellent observation of Janssen showing a good amount of detail. Janssen is a complex crater and would be difficult to render in 20 minute but you have done a very good job. Thank you for sharing it with us all.


#4 kraterkid


    Fly Me to the Moon

  • *****
  • Posts: 5104
  • Joined: 07 Mar 2005

Posted 29 May 2009 - 06:10 PM

Alright Uwe! :jump: A wonderful sketch capturing so much of the detail in this complex crater. I love the way you dealt with the shadows. I was out observing Janssen the same night and your rendition is marvelous! :waytogo:

#5 Sol



  • -----
  • Posts: 2116
  • Joined: 20 Aug 2007

Posted 30 May 2009 - 05:53 PM

A good sketch of that complex area Uwe, your technique has moved on a lot since you were posting in the solar forum.


#6 rolandlinda3



  • *****
  • Posts: 3434
  • Joined: 24 Jan 2006

Posted 30 May 2009 - 11:01 PM

that is a lot of work for 20 minutes. nice sketching. you could try some quick work with a blending stump or stick...I have tried that when I am in a hurry at the end of a sketch. It seems to help bring out a little more without much time added. Roland

#7 Uwe Pilz

Uwe Pilz


  • *****
  • Posts: 1116
  • Joined: 16 May 2008

Posted 31 May 2009 - 01:45 AM

I have used the belnding stump ... if the areas were smooth. In structured I left the paper structure.

#8 Dee


    Viking 1

  • *****
  • Posts: 871
  • Joined: 12 Mar 2006

Posted 04 June 2009 - 03:52 AM

Lovely fresh look to your drawing, very clear .


Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics