Intensity Estimates

When completing a drawing of Jupiter, observers can also makes estimates of the intensity of the features recorded. While the value of a drawing is its ability to provide a visual record of the planet's appearance, intensity estimates provide a source of data that can actually be quantified. This is very important data that the amateur can collect. Professionals find this data, collected over time, to be valuable to their own research.

Observing forms can also provide a place to record intensity estimates (Fig. 9.1). The observing form used by the A.L.P.O. provides a separate disk on its form next

Fig. 9.6. More amazing strip sketches of Jupiter by Clay Sherrod. Note the spectacular detail he has recorded! (Credit: P. Clay Sherrod).
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