Astronomical sketching : a step-by-step introduction by Richard Handy; et al

By Richard Handy; et al

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Rework any inconsistencies with your blending stump and kneaded eraser. After shading the comet features, replot any stars that were blurred in the process. Take a few moments to reexamine the view through the eyepiece and compare the star brightness to what you see on your sketch. Adjust the boldness of any stars necessary to match what you see. 16) This is also a good time to finish writing any notes about the observation. Step 9: Marking motion I find that part of the enjoyment of comet observing is noting the motion of the comet over the course of the observation.

The dashed circle represents how I visualized this diameter on the sketch. Step 4: Sketching the first layer of the coma With the size and profi le of the coma in mind, lightly load your blending stump with graphite (see Using a Blending Stump on page 153). Take the blending stump and begin swirling it lightly, starting at the point you marked in Step 2. Using a delicate circular motion, proceed outward from the center to define the coma’s visible diameter. 4) As you approach the outer edge of the coma, decrease the pressure on the blending stump to the lightest possible touch.

17) Do not forget to note the time. With this step complete, you have a full record of time well spent with the comet. 19. 2 Creating a Wide Field Comet Sketch Every so often, a notably bright comet will grace the night sky, offering an exciting opportunity for detailed binocular observations. Some may even stand up to naked-eye scrutiny. Making an effort to sketch one of these remarkable comets will provide you with a fine record of an event that you will remember for years to come. For a naked-eye or binocular sketch, you may want to print or copy a sky chart of the area so that you can concentrate on the comet rather than the daunting multitude of stars you are bound to see.

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