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Extra resources for Astronomical sketching : a step-by-step introduction
Mark the cardinal directions around your sketch circle. 1) Use one of the techniques discussed in Assessing Cardinal Directions on page 39. Step 2: Plotting the star framework If you placed a star in the center of your view, mark it now with your pencil. 2) For tips on plotting stars in your sketch, see Marking Stars on page 126. 4 of the comet at the center of your sketch, refer momentarily to Step 3 to lightly mark its position there and then return to this step. With the center point marked, you will now plot the remaining stars that are visible through the eyepiece.
Step 4 The gray tone values are added at this stage of the sketch. Hold the 2B Conté stick on its side and lightly, but rapidly, in a back-and-forth random motion, build up the surface with strokes of white. Make certain that you do not cover the outlined shadow areas already established in the previous step. 6) Step 5 Blend the white that you have overlaid on the surface of the paper with a natural or synthetic sponge. Rapid and randomized motions seem to work best, creating a uniform smooth gray tone.
One ﬁnal issue is how to hold your red ﬂashlight. If you are able to sit while observing, you can keep the clipboard in your lap and hold the ﬂashlight in one hand while you sketch with the other. 3 if you must stand to observe, the solu- 44 Astronomical Sketching: A Step-by-Step Introduction tion requires a bit more creativity since you must now hold the clipboard with your free hand. A simple solution is to lay the ﬂashlight on its side on the clipboard and aim it at your sketch. 4) This can be a frustrating solution though, because the ray of light will fade from light to dark across the length of your sketch.