Edge of Mare Crisium
Posted 04 September 2012 - 03:05 PM
Erika Rix, Texas - www.pcwobservatory.com
AT6RC f/9 1370mm, LXD75, Baader Planetarium Hyperion 8-24mm Mark III (FOV 68 degrees at 171x), no filter
84F, 56% H, winds gusting 5-10 mph, clear, Antoniadi IV increasing to II, T 3/6
Alt: 11deg 43´, Az: 83deg 22´ to Alt: 46deg 21´, Az: 105deg 21´
Phase: 318.4 degrees, Lunation: 17.48 d, Illumination: 87.4%
Lib. Lat: -03:07, Lib. Long: +03.74
Type: Sea (Sea of Crisis)
Geological period: Nectarian (From -3.92 billion years to -3.85 billion years)
Floor: lava-filled and is ~ 1.8 km below lunar datum
Outer rim: ~3.34 km above lunar datum
Eyepiece sketch on black Strathmore Artagain paper, white Conte’ crayon and pencil, Derwent watercolor pencil, black charcoal, black oil pencil.
Link to full report
Mare Crisium looked like it was taking a bite out of the Moon. I’ve always been a bit intimidated at sketching rough terrain, but took a stab at it nevertheless. Sketching in the highlights makes it incredibly easier in fast moving areas such as along the terminator. The trick is to have very sharp pencils at hand, and I made sure of that during set up before it got dark outside – although I did have to resharpen once or twice during the session (as well as stand up and stretch.) It was a rush against time to render the basin’s western edge before the shadows swallowed the view.
I began with the inner ridgeline along the terminator, marking each highlighted crest individually with a very sharp Conte’ pastel pencil. Then as quickly and accurately as I could, started working my way west, alternating between the Conte’, charcoal, Derwent and oil pencils, focusing first on the highlights, then the shadows, followed by albedo.
Posted 04 September 2012 - 04:15 PM
What a detailed sketch! You managed to sketch a remarkable amount of surface of the moon. I'm much impressed by the attention you payed to the details in the sketch. How did you not get lost in the clutter and how did you stay focused for such a long session? Congratulations with a job very well done!
Posted 04 September 2012 - 06:54 PM
It is simply amazing to be able to keep all your concentration on details while having to go back and fro to the eyepiece.
Posted 04 September 2012 - 08:21 PM
How did you not get lost in the clutter and how did you stay focused for such a long session?
Thanks Rony and Jean.
I did get lost a couple times in the rim of Mare Crisium, especially as the shadows were changing quite a bit during the course of the session. I had to keep going back to the major features in the rim to map my way to where I needed to go next. The worst was the roughened area just west of the rim. There was so much insignificant detail in that lightened patch that I didn't know where to begin. So I concentrated on the major details first and then filled in as time allowed. Each highlighted area was plotted, not just randomly added to give the appearance of the rim. Those highlights were actually easier to sketch than the brightened rough area to the west of the west of the rim.
I stopped a few times to stand up and stretch. That sort of revived me for the next round. I had intended to sketch Jupiter next but ran out of steam.
Posted 04 September 2012 - 11:04 PM
I don't believe that I could sketch 3 hours in one step. Thank you for sharing ths beautiful image.
Posted 05 September 2012 - 01:30 AM
Posted 05 September 2012 - 07:13 AM
Posted 05 September 2012 - 01:23 PM
Posted 05 September 2012 - 11:41 PM
That is a masterpiece of a marathon sketch. You selected a beautiful and difficult target and handled it with your grand style.
Stunning work and a real treat to also see at Lunar Photo of the Day (LPOD) September 6, 2012.
Posted 06 September 2012 - 12:15 PM
Posted 07 September 2012 - 01:30 PM
Good sketch of the Edge of Mare Crisium .
Posted 10 September 2012 - 05:37 PM
Posted 10 September 2012 - 07:30 PM