March 2014 issue – Sidereal Times

•May 28, 2014 • Leave a Comment

I’ve been lax posting the monthly issues of Sidereal Times. Here is the March information.

The March 2014 issue of Sidereal Times for the Austin Astronomical Society is now available for download.

Sidereal Times – March 2014
201403-cover

In the March issue, you’ll find information on our upcoming March meeting featuring Chris Sneden of the Astronomy Department at UT and his upcoming presentation on The Extraordinary Lives of Globular Star Clusters. Erika Rix will be giving a hands-on Practical Astronomy workshop where participants can make their own solargraph pin-hole cameras prior to the meeting.

Please contact me if you’re interested in joining the club or wish for more information! It’s a very active club and has a great outreach program.

2014 April 15 – Lunar Eclipse Animations

•May 25, 2014 • 2 Comments

Rich Lunar EclipseMaster lunar sketcher and great friend, Rich Handy, created a 7-sketch sequence on August 28th, 2007 of the total lunar eclipse. While putting them into an animation, I was inspired to one day try it myself. That opportunity came on April 15th this year.

As a recap, I set up my 60D DSLR camera and tripod so that a friend could take photos of the event while I sketched at the eyepiece of a 102mm refractor. My stamina lasted until mid-totality before ending the sketching session to finish the photography sequence. The sketches have been smoldering in their folder until just recently. I say “smoldering” because each sketch from ingress to mid-totality took only 5-10 minutes before starting the next one!

Animation-ER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The sketches were flipped and rotated to match standard orientation.

preparing media

Preparing the circular sketch template

To prepare for the sketch sequence, I put together a media kit that included color Conte’ pastels, white pencils, an eraser, bulb blower and black Strathmore Artagain paper (400 series). To save time at the eyepiece, I used an upside bowl to create circle templates on several sheets of the black paper before heading outside.

prepared media

The prepared sketch kit and drawing board – ready to head outside

The pastels were assorted by the color palette I expected for the eclipse. Times that the phases were to occur and the planned sketch times (every 15 minutes) were jotted down on paper and taped to my drawing board.

Outside, I organized the sketch kit on a tray next to the observing chair for easy access and then sketched the Moon prior to the umbral phase. Once the actual eclipse began (05:58 UT), there was a flurry of sketching activity to catch the main features of the Moon, umbral movements, and the color changes. The most difficult part was resisting the temptation to chase the umbra’s shadow as it quickly moved across the disk.

The first step was to note the time outside of the sketch area and fill in the background of the disk with the side of a white (or color if needed) pastel stick. After blending quickly with my fingertips, I drew the umbra’s curved shadow and then filled in as many lunar features as possible within the allocated time slot. The sketch was removed from the pad and placed into a folder for safe-keeping before moving on to the next one.

20140415 collage low res

I ran out of steam during the greater eclipse phase and felt quite an accomplishment for completing the entire ingress segment.

A few days later, Rich sent me his beautiful eclipse sequence to animate, and I was thrilled to see he hung in there to sketch the entire event!

collage

Here are the details from Rich:

Telescope: Tele Vue Pronto 70mm f/6.8 E.D.
Eyepiece: 8-24mm Tele Vue Zoom (24mm setting)
Date: 4-15-2014 Time: 04:54 UTC – 0950 UTC
Weather: Clear, 10-15 mph winds
Seeing: Antoniadi II to III

Materials:

  • 14 sheets of Strathmore Artagain 400 Series 9” x 12” Coal Black drawing paper
  • 1 White Conte’ crayon
  • 1 White Conte’ pastel pencil #13
  • 1 Light orange Conte’ pastel pencil #17
  • 1 Medium orange Conte’ pastel pencil #12
  • 1 Deep orange Conte’ pastel pencil #40
  • 1 Brown Conte’ pastel pencil #07
  • 1 Sanquine Conte’ stick
  • 1 Tan dry pastel stick
  • 1 Brown dry pastel stick
  • 1 Art gum eraser
  • 1 12” x 16” drawing board
  • 1 Roll of 2” wide masking tape (four pieces to hold the corners of the paper down)

I was very excited to hear about the April 15, 2014 total lunar eclipse because I wanted to capture the entire event as a set of individual sketches. Based on the approximately 240 minute duration of the eclipse, and the fact that each sketch would take from 10-15 minutes, I calculated that 14 sketches would work well to document the entire eclipse.

First, I used the plastic lid to a jar and the white Conte’ pastel pencil to create 4” diameter circles on each of the 14 sheets. Each piece of black paper was taped down across the four corners only to allow quick removal and mounting of the next sheet to the drawing board.

Before sketching, I recorded my start time using Universal Coordinated Time (UTC), and did the same when I finished each sketch. I started using white Conte’ pastel pencil and white Conte’ crayon to sketch the Moon, and as the dark umbra advanced across the disk, I sketched the crescent Moon as it was gradually being overtaken by the Earth’s shadow.

At about the time of the 6th sketch, the beautiful copper orange hues started to dominate, with only a segment of brightly lit lunar surface showing. For these colors, I found that the orange and brown pastel pencils along with the sanguine stick and dry pastels represented the colors pretty well. I applied these colors in a very quick and almost impressionistic style, knowing that I did not have the time necessary to produce detailed drawings.

Eventually the bright white edge of the 11th sketch signaled the end of the umbral eclipse as the Moon slowly emerged from Earth’s shadow and by the time I started working on the 13th sketch the Moon had lost most of it’s color. The 14th sketch has just a small bite missing. Finally the 15th sketch is a reproduction of the first one, since at that point there was no further change noted and the Moon appeared just as it did prior to the eclipse.

Capturing the entire eclipse from start to finish as a series of individual sketches was very challenging and at many times during the course of the sequence I felt overwhelmed by the task, but my perseverance was rewarded with a unique record of a stunningly beautiful celestial event.

Rich Handy

I used Adobe Photoshop CS6 to process and animate the sketch sequences that Rich and I created. Here’s hoping for success during the upcoming eclipse in October!

20140415-Total-Lunar-Eclipse-RH

2014 04 15 Total Lunar Eclipse

•April 15, 2014 • 2 Comments

10171100_10202463032870961_8131867034584355636_nEarly this morning, we were treated to a total lunar eclipse in most of North America. I spent a good chunk of the evening preparing my sketch kit to record the event through a series of sketches to be animated. I also set up the Canon 60D DSLR equipped with a 70-300mm zoom lens, set at 300mm. 1613982_10202464300302646_4627109439256183855_n

The sketches are left smoldering in a folder until I can bare too look at them – what a new experience for me to work at such a fast pace with color pastels! In the mean time, here is the resulting animation of the photo sequence. My friend, Stephanie Hansen was my observing buddy and snapped the first half of the eclipse for me while I sketched.

20140415-total-lunar-eclipse

Mars was shining brightly northwest of the Moon and Spica was seen to the southwest.
10273330_10202466470276894_3417002739465592513_o

2014 02 13, 13.24-day-old Moon

•February 20, 2014 • Leave a Comment

2014 02 13, 0325-0620UT (-6) 13.24-day-old Moon
Erika Rix, Texas, http://www.pcwobservatory.com
102mm f/9.8 refractor, LXD75, 13% T filter, 20mm, 50x
S: Antoniadi II, T: 2-4/6, Temp: 31F, H: 51%
Colongitude: 70.2°
Phase: 20.3°
Lunation: 13.24 days
Illumination: 96.9%

20140213-13.24d

Eyepiece sketch on black Strathmore Artagain paper, white Conte crayon, white charcoal pencil, black Derwent charcoal pencil, black woodless oil pencil, blending stump.

2014 02 10, 10.13-day-old Moon

•February 14, 2014 • Leave a Comment

The evening started off clear with crisp views. The clouds moved in shortly after the terminator was sketched, so I concentrated on adding key identifiable features on the lunar disk like rays, maria and bright craters. The session ended at 0330 UT (2100 local time) as the sky became completely overcast, leaving me with an unfinished sketch.

2014 02 10, 0045-0330UT (-6) 10.13-day-old Moon
Erika Rix, Texas, http://www.pcwobservatory.com
102mm f/9.8 refractor, LXD75, 13% T filter, 20mm, 50x
S: Antoniadi I, T: 5/6 degrading to 0/6, Temp: 58F, H: 53%, clear to 100% overcast
Colongitude: 32.5°
Phase: 53.9°
Lunation: 10.13 days
Illumination: 79.4%

20140210 10.13d

Eyepiece sketch on black Strathmore Artagain paper, white Conte crayon, white charcoal pencil, black Derwent charcoal pencil, black woodless oil pencil, blending stump.

2014 02 09, 9.12-day-old Moon

•February 13, 2014 • Leave a Comment

This was a marathon session. I meant to be outside for only a couple hours. Then four hours later, I forced myself to stop sketching even though more detail could have been added. The sky conditions that night were nearly perfect.

2014 02 09, 0030-0430UT (-6) 9.12-day-old Moon Erika Rix, Texas, http://www.pcwobservatory.com
102mm f/9.8 refractor, LXD75, 13% T filter, 20mm, 50x
S: Antoniadi I, T: 5/6, Temp: 40F, H: 50%, c/c
Colongitude: 20.3°
Phase: 64.9°
Lunation: 9.12 days
Illumination: 71.2%

20140209 9.12d


Eyepiece sketch on black Strathmore Artagain paper, white Conte crayon, white charcoal pencil, black Derwent charcoal pencil, black woodless oil pencil, blending stump.

A member from the Austin Astronomical Society, Rob Pettengill, was imaging that same night and sent me an animation to compare my sketch to the fantastic image he took that night.

“I noticed that we both caught the gibbous moon last night and was curious about how it would look with the photo I took, so I scaled my picture to the same size and made an animated gif. I thought that you might be amused by the result as well.”

I really enjoy these types of comparisons. Not only does it show similarities, but it also shows where my sketch was off. This helps me to improve my sketching technique.

GibbousMoonAnimation140208

2014 02 05, 5.13-day-old Moon

•February 12, 2014 • Leave a Comment

The weather hasn’t cooperated very well for a daily lunar phase sketch. Even so, it’s been great fun watching the progression of the terminator on the “clear enough” nights!

2014 02 05, 00455-0322UT (-6) 5.13-day-old Moon Erika Rix, Texas, http://www.pcwobservatory.com
102mm f/9.8 refractor, LXD75, 20mm, 50x
S: Antoniadi III, T: 5/6, Temp: 41F, H: 55%, c/c
Colongitude: 331.6°
Phase: 111.0°
Lunation: 5.13 days
Illumination: 32.1%

20140205 5.13d

Eyepiece sketch on black Strathmore Artagain paper, white Conte crayon, white charcoal pencil, black Derwent charcoal pencil, black woodless oil pencil, blending stump.

2014 02 02, 2.12-day-old Moon

•February 11, 2014 • Leave a Comment

This was a rushed sketch before the overcast sky prematurely ended the observing session. Very little albedo features were detected within the earthshine.

2014 02 02, 0030-0130 UT (-6) 2.12-day-old Moon
Erika Rix, Texas, http://www.pcwobservatory.com
102mm f/9.8 refractor, LXD75, 20mm, 50x
Partly cloudy degrading to overcast
Colongitude: 294.7°
Phase: 150.3°
Lunation: 2.12 days
Illumination: 6.6%

20140202 2.12 day Moon


Eyepiece sketch on black Strathmore Artagain paper, white Conte crayon, white charcoal pencil, black Derwent charcoal pencil, black woodless oil pencil, blending stump.

2014 February 1, 1.12 day Moon

•February 10, 2014 • Leave a Comment

The Moon was sinking toward the horizon with cirrus clouds obscuring the view. Thankfully I had the opportunity to grab a quick binocular sketch in the front field regardless of the soft views through Earth’s atmosphere.

2014 02 01, 0030-0100 UT (-6) 1.12-day-old Moon
Erika Rix, Texas, http://www.pcwobservatory.com
15x70mm binoculars, no filter
Thin cirrus
Colongitude: 282.6°
Phase: 164.1°
Lunation: 1.12 days
Illumination: 1.9%

20140201 1.12 day Moon

Eyepiece sketch on black Strathmore Artagain paper, white Conte crayon, white charcoal pencil, black Derwent charcoal pencil, black woodless oil pencil, blending stump.

February 2014 issue – Sidereal Times

•February 6, 2014 • Leave a Comment

The February 2014 issue of Sidereal Times for the Austin Astronomical Society is now available for download.

Sidereal Times – February 2014
201402 cover

In February’s issue, you’ll find information on our upcoming general meeting featuring an Astronomical League presentation by Lauren Gonzalez. Erika Rix will be giving a hands-on lunar sketching workshop during the Practical Astronomy session just prior to the meeting.
You’ll read about club events, upcoming outreach opportunities, Astronomical League news and a report about the Gullett Elementary School outreach event. Other features include In Memoriam for Jim Fahey, NASA’s Day of Remembrance, and John Dobson’s Legacy. And of course our regulars – Image of the Month, February Observing Targets, Satellite Safari App Review, NASA’s Space Place “Surprising Young Stars in the Oldest Places in the Universe”, and the member’s gallery.

Please contact me if you’re interested in joining the club or wish for more information! It’s a very active club and has a great outreach program.