It is fascinating to watch these events, and to plot visual light-curves of the mutual eclipses. CCD imaging CCD imaging is an excellent way of recording the appearance of Jupiter. Images can enhance Jupiter's rather low contrast, and can provide accurate measurements of both latitude and longitude. A telescope of at least 200 mm is needed for high-quality images. Imagers are recommended to use an infrared exclusion filter.
Most observers process their images to reduce limb-darkening and enhance contrast.
Sharpening in particular may enhance the appearance but make it less reliable. Traditional photography of Jupiter is difficult, because of the planet's low surface brightness and its limb darkening. It has now been superceded by CCD imaging, as the shorter exposures can give excellent results even in mediocre seeing such as is common in Britain. BAA Jupiter Section Director.