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3<5 9 LONGITUCCSY STEM I

Jupier's NEB/NTrZ ■ September 28. 2001 (09.40 to 11:00 UT)

P Cljv S*i9iT«J. Arkansas SkyOt^^itcry - 031m Schmidt

Fig. 9.5. A wonderful strip sketch of a portion of Jupiter made by Clay Sherrod. Note the longitudinal data provided and the labeling of the belts and zones. (Credit: P. Clay Sherrod).

Equatorial Belt. It can span the entire width of the planet or a shorter segment. If desired, the strip sketch can be even more restricted than this, covering only the Great Red Spot (GRS) and its immediate surroundings, for example, allowing you to concentrate on this in great detail. Phillip Budine refers to these as sectional sketches, covering only a short longitudinal section of the planet. Or, the strip sketch can be kept going for hours, making a continuous record of the planet as it rotates during the night. When this latter method is adopted, the sketch can be done in conjunction with central meridian transit timings, to be discussed later, and tied to the sketch by annotating features with their longitude. In recent times, Claus Benninghoven and Clay Sherrod have demonstrated great skill in making strip sketches, rivaling information recorded by CCD cameras (Figs. 9.5-9.7).

To start a strip sketch, all the rules discussed in making a full disk drawing should be followed. Limit the observation to no more than 20 min for the section being drawn, recording the large features first, then drawing in the smaller features in relation to the larger ones. Finally, check the accuracy of your sketch with the view in your telescope. The A.L.P.O. also provides a form for the strip sketch. The same data mentioned above for a full disk drawing should also be recorded for a strip sketch.

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